CN1753592A - Organic electroluminescent element and display device including organic electroluminescent element - Google Patents
Organic electroluminescent element and display device including organic electroluminescent elementDownload PDFInfo
- Publication number
- CN1753592A CN1753592ACN 200510092761CN200510092761ACN1753592ACN 1753592 ACN1753592 ACN 1753592ACN 200510092761CN200510092761CN 200510092761CN 200510092761 ACN200510092761 ACN 200510092761ACN 1753592 ACN1753592 ACN 1753592A
- Authority
- CN
- China
- Prior art keywords
- layer
- salt
- concentration
- cathode
- electron source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Electroluminescent Light Sources (AREA)
Abstract
Description
Translated fromChinese技术领域technical field
本发明涉及一种有机电激发光元件(organic electroluminescent device，OELD)及包含有机电激发光元件的显示装置，特别是涉及一种盐类在电子源中具有一随空间分布变化的浓度的有机电激发光元件及包含有机电激发光元件的显示装置。The invention relates to an organic electroluminescent device (organic electroluminescent device, OELD) and a display device comprising the organic electroluminescent device, in particular to an organic electroluminescent device in which a salt has a concentration that varies with spatial distribution in an electron source. An excitation light element and a display device including an organic electroluminescence element.
背景技术Background technique
关于OELD的开发方面，由于阴极的材料必须是低功函数的金属，本身的反应性须要很强，故早期业者是用镁加入少许的银(大概用十比一的比例)当作一个很好的阴电极用合金。然而，高反应性金属却极不适合于应用在OELD工艺上，故业者随后以钝性的金属，如铝，当作电子注入电极。但这一类的金属的功函数和有机层的最低未填满分子轨域(lowest unoccupiedmolecular orbital，LUMO)能阶不匹配，故实际在使用时需要在铝及有机层之间插入一层极薄的盐类，如氟化锂(LiF)。如此一来，借着LiF的绝缘性引发电子穿隧效应(tunneling effect)，可大幅增进电子注入效率，解决钝性金属功函数不匹配的问题。Regarding the development of OELD, since the material of the cathode must be a metal with a low work function, the reactivity itself needs to be very strong, so the early industry used magnesium to add a small amount of silver (probably with a ratio of ten to one) as a very good solution. Alloys for cathode electrodes. However, highly reactive metals are extremely unsuitable for the OELD process, so the industry then uses passive metals, such as aluminum, as electron injection electrodes. However, the work function of this type of metal does not match the energy level of the lowest unoccupied molecular orbital (LUMO) of the organic layer, so it is necessary to insert an extremely thin layer between the aluminum and the organic layer in actual use. salts such as lithium fluoride (LiF). In this way, the electron tunneling effect (tunneling effect) can be induced by the insulation of LiF, which can greatly improve the electron injection efficiency and solve the problem of passive metal work function mismatch.
在电子传输层的开发方面，目前最强力的作法乃是在有机电子传输材料中掺杂高活性的金属，如锂(Li)或铯(Cs)，以形成自由基阴离子及电荷转移错合物[radical anions and charge transfer(CT)complexes]。因此，让元件的操作电压大幅度下降。掺杂锂(Li)金属有机薄膜的导电度约为3×10-5(S/cm)，这表示其内的载子密度(carrier density)可能高达1018(cm-3)。然而，由于铯(Cs)、锂(Li)、镁(Mg)等碱金或碱土族金属的化学活性非常高，且金属的掺杂浓十分严苛，些微的偏差将导致元件发光效率及操作寿命的大幅变异。因此，不适合大规模应用在制作OELD时所常使用的热蒸镀工艺上。此外，掺杂层的金属离子在电流趋动下会发生扩散而在有机发光层中引发亮度骤熄效应(luminance quenching effect)，导致元件的发光效率及操作寿命下降。In terms of the development of the electron transport layer, the current most powerful approach is to dope highly active metals, such as lithium (Li) or cesium (Cs), in organic electron transport materials to form free radical anions and charge transfer complexes. Things [radical anions and charge transfer (CT) complexes]. Therefore, the operating voltage of the element is greatly reduced. The electrical conductivity of lithium (Li)-doped metal-organic thin films is about 3×10-5 (S/cm), which means that the carrier density therein may be as high as 1018 (cm-3 ). However, due to the high chemical activity of alkali gold or alkaline earth metals such as cesium (Cs), lithium (Li), and magnesium (Mg), and the doping concentration of the metal is very strict, a slight deviation will lead to a decrease in the luminous efficiency and operation of the device. Large variability in lifespan. Therefore, it is not suitable for large-scale application in the thermal evaporation process commonly used in the manufacture of OELD. In addition, the metal ions in the doped layer will diffuse under the trend of current to cause a luminance quenching effect in the organic light-emitting layer, resulting in a decrease in the luminous efficiency and operating life of the device.
发明内容Contents of the invention
有鉴于此，本发明的目的就是在提供一种有机电激发光元件(organicelectroluminescent device，OELD)及包含有机电激发光元件的显示装置。其盐类在电子源中具有一随空间分布变化的浓度的设计，可以致使盐类在电子源邻近于阴极处的浓度大于盐类在电子源邻近于发光层处的浓度。如此一来，可以提升电子源的电子注入效率及电子传输能力，而降低元件的操作电压，且延长元件的操作寿命。In view of this, the object of the present invention is to provide an organic electroluminescent device (OELD) and a display device including the organic electroluminescent device. The design that the salt has a concentration varying with the spatial distribution in the electron source can cause the concentration of the salt at the electron source adjacent to the cathode to be greater than the concentration of the salt at the electron source adjacent to the light-emitting layer. In this way, the electron injection efficiency and electron transport capability of the electron source can be improved, the operating voltage of the element can be reduced, and the operating life of the element can be extended.
根据本发明的目的，提出一种有机电激发光元件，包括一阳极、一阴极、一发光层、一空穴源及一电子源。发光层设置于阳极及阴极之间，空穴源设置于阳极及发光层之间。电子源设置于阴极与发光层之间，由至少一有机材料及至少一盐类所构成。盐类在电子源中具有一随空间分布变化的浓度，致使盐类在电子源邻近于阴极处的浓度大于在电子源邻近于发光层处的浓度。According to the purpose of the present invention, an organic electroluminescent element is proposed, which includes an anode, a cathode, a light-emitting layer, a hole source and an electron source. The light-emitting layer is arranged between the anode and the cathode, and the hole source is arranged between the anode and the light-emitting layer. The electron source is arranged between the cathode and the light-emitting layer, and is composed of at least one organic material and at least one salt. The salt has a spatially variable concentration in the electron source such that the concentration of the salt is greater where the electron source is adjacent to the cathode than where the electron source is adjacent to the light-emitting layer.
根据本发明的再一目的，提出一种显示装置，包括一基板及一有机电激发光元件。有机电激发光元件设置于基板上，并包括一阳极、一阴极、一发光层、一空穴源及一电子源。发光层设置于阳极及阴极之间，空穴源设置于阳极及发光层之间。电子源设置于阴极与发光层之间，由至少一有机材料及至少一盐类所构成。盐类在电子源中具有一随空间分布变化的浓度，致使盐类在电子源邻近于阴极处的浓度大于在电子源邻近于发光层处的浓度。According to still another object of the present invention, a display device is provided, which includes a substrate and an organic electroluminescence element. The organic electroluminescent element is arranged on the substrate and includes an anode, a cathode, a light emitting layer, a hole source and an electron source. The light-emitting layer is arranged between the anode and the cathode, and the hole source is arranged between the anode and the light-emitting layer. The electron source is arranged between the cathode and the light-emitting layer, and is composed of at least one organic material and at least one salt. The salt has a spatially variable concentration in the electron source such that the concentration of the salt is greater where the electron source is adjacent to the cathode than where the electron source is adjacent to the light-emitting layer.
为让本发明的上述目的、特征、和优点能更明显易懂，以下配合附图以及优选实施例，以更详细地说明本发明。In order to make the above objects, features, and advantages of the present invention more comprehensible, the present invention will be described in more detail below in conjunction with the accompanying drawings and preferred embodiments.
附图说明Description of drawings
图1绘示乃依照本发明的实施例一的包含有机电激发光元件的显示装置的剖面图；FIG. 1 is a cross-sectional view of a display device including an organic electroluminescent element according to Embodiment 1 of the present invention;
图2绘示乃依照本发明的实施例二的包含有机电激发光元件的显示装置的剖面图；FIG. 2 is a cross-sectional view of a display device including an organic electroluminescent element according to Embodiment 2 of the present invention;
图3绘示乃依照本发明的实施例三的包含有机电激发光元件的显示装置的剖面图；以及FIG. 3 shows a cross-sectional view of a display device including an organic electroluminescent element according to
图4A～4C绘示乃本实施例各色元件及比较例各色元件于操作电压及发光亮度的关系曲线上的比较示意图。4A to 4C are schematic diagrams showing the comparison of the relationship between the operating voltage and the luminance of each color element of this embodiment and each color element of the comparative example.
简单符号说明simple notation
10、20、30：显示装置10, 20, 30: display device
11：基板11: Substrate
12：阳极12: anode
13：阴极13: Cathode
14：发光层14: Luminous layer
15：空穴源15: Hole source
16、26、36：电子源16, 26, 36: electron source
17：空穴传输层17: Hole transport layer
18：空穴注入层18: Hole injection layer
19、29、39：有机电激发光元件19, 29, 39: Organic electroluminescent components
26a：第一层26a: First floor
26b：第二层26b: Second floor
26c：第三层26c: third floor
36(1)、36(2)、36(i-1)、36(i)、36(i+1)、36(N-1)、36(N)：层36(1), 36(2), 36(i-1), 36(i), 36(i+1), 36(N-1), 36(N): layers
M：有机材料M: organic material
S：盐类S: salt
C1、C2、C3：盐类在电子源中随空间分布变化的浓度C1, C2, C3: The concentration of salts in the electron source varies with the spatial distribution
X1、Y1、Z(1)：盐类在电子源邻近于阴极处的浓度X1, Y1, Z(1): the concentration of the salt at the electron source adjacent to the cathode
X2、Y2、Z(N)：盐类在电子源邻近于发光层处的浓度X2, Y2, Z(N): the concentration of the salt at the electron source adjacent to the light-emitting layer
具体实施方式Detailed ways
实施例一Embodiment one
请参照图1，绘示乃依照本发明的实施例一的包含有机电激发光元件(organic electroluminescent device，OELD)的显示装置的剖面图。在图1中，显示装置10包括一基板11及一有机电激发光元件19，有机电激发光元件19设置于基板11上，并包括一阳极12、一阴极13、一发光层14、一空穴源15及一电子源16。其中，有机电激发光元件19以阳极12设置于基板11上为例作说明，但本实施例的技术并不局限在此。例如，有机电激发光元件19以阴极13设置于基板11上。发光层14设置于阳极12及阴极13之间，空穴源15设置于阳极12及发光层14之间。电子源16设置于阴极13与发光层14之间，由至少一有机材料M及至少一盐类S所构成。盐类S在电子源16中具有一随空间分布变化的浓度C1，致使盐类S在电子源16邻近于阴极13处的浓度X1大于在电子源16邻近于发光层14处的浓度X2。如此一来，可以提升电子源16的电子注入效率及电子传输能力，而降低有机电激发光元件19的操作电压，且延长有机电激发光元件19的操作寿命。Please refer to FIG. 1 , which shows a cross-sectional view of a display device including an organic electroluminescent device (OELD) according to Embodiment 1 of the present invention. In FIG. 1 , a display device 10 includes a substrate 11 and an organic electroluminescent element 19. The organic electroluminescent element 19 is arranged on the substrate 11 and includes an anode 12, a cathode 13, a light-emitting layer 14, and a hole. source 15 and an electron source 16. Wherein, the organic electroluminescent element 19 is illustrated by taking the anode 12 disposed on the substrate 11 as an example, but the technology of this embodiment is not limited thereto. For example, the organic electroluminescent element 19 is disposed on the substrate 11 with the cathode 13 . The light emitting layer 14 is disposed between the anode 12 and the cathode 13 , and the hole source 15 is disposed between the anode 12 and the light emitting layer 14 . The electron source 16 is disposed between the cathode 13 and the light emitting layer 14 and is composed of at least one organic material M and at least one salt S. The salt S has a spatially variable concentration C1 in the electron source 16 such that the concentration X1 of the salt S at the electron source 16 adjacent to the cathode 13 is greater than the concentration X2 at the electron source 16 adjacent to the light-emitting layer 14 . In this way, the electron injection efficiency and electron transport capability of the electron source 16 can be improved, the operating voltage of the organic electroluminescent element 19 can be reduced, and the operating life of the organic electroluminescent element 19 can be extended.
在本实施例中，电子源16为单层结构。此外，空穴源15还包括一空穴传输层17及一空穴注入层18，空穴传输层17设置于阳极11及发光层14之间，空穴注入层18设置于空穴传输层17及阳极11之间。In this embodiment, the electron source 16 has a single-layer structure. In addition, the hole source 15 also includes a hole transport layer 17 and a hole injection layer 18, the hole transport layer 17 is arranged between the anode 11 and the light emitting layer 14, and the hole injection layer 18 is arranged between the hole transport layer 17 and the anode Between 11.
当X1及X2实质上分别为100wt％及0wt％时，表示邻近于阴极13处的一小部分的电子源16完全由盐类S所构成，不含任何有机材料M。而邻近于发光层14处的另一小部分的电子源16完全由有机材料M所构成，不含任何盐类S。并且，电子源16的其它部分由有机材料M及盐类S所共同构成。其中，当X1实质上为100wt％时，X2实质上可不为0wt％。此外，当X2实质上为0wt％时，X1实质上可不为100wt％。When X1 and X2 are substantially 100wt% and 0wt% respectively, it means that a small portion of the electron source 16 adjacent to the cathode 13 is completely composed of salt S without any organic material M. Another small portion of the electron source 16 adjacent to the light-emitting layer 14 is entirely made of organic material M without any salt S. In addition, other parts of the electron source 16 are composed of the organic material M and the salt S. Wherein, when X1 is substantially 100 wt%, X2 may not be substantially 0 wt%. In addition, when X2 is substantially 0 wt%, X1 may not be substantially 100 wt%.
然本实施例所属技术领域中的技术人员亦可以明了本实施例的技术并不局限在此，例如，盐类S包括一有机金属盐类或一无机金属盐类。此外，盐类S包括一碱金族(IA)盐类或一碱土族(IIA)盐类。此外，当盐类S为无机金属盐类时，盐类S可包括氯化钠(sodium chloride，NaCl)、氟化锂(lithium fluoride，LiF)、氟化铯(cesium fluoride，CsF)、氧化锂(lithium oxide，Li2O)、氟化钡(barium fluoride，BaF2)、氟化锶(strontium fluoride，CrF2)、氟化镁(magnesium fluoride，MgF2)、氟化钙(calcium fluoride，CaF2)或氧化钙(calcium oxide，CaO)。也就是说，盐类S选自于氯化钠、氟化锂、氟化铯、氧化锂、氟化钡、氟化锶、氟化镁、氟化钙及氧化钙所组成的族群中的至少一种或任意组合。另外，当盐类S为有机金属盐类时，盐类可包括烷基锂(alkyllithium)、碳酸铯(cesium carbonate，CsCO3)、醋酸铯(cesium acetate，H3COOCs)、醋酸钾(potassium acetate，H3COOK)或醋酸钠(sodium acetate，H3COONa)。也就是说，盐类S选自于烷基锂、碳酸铯、醋酸铯、醋酸钾及醋酸钠所组成的族群中的至少一种或任意组合。再者，盐类S的金属的原子序可大于或等于19，且盐类S包括氟化铯、氟化钡、氟化镁、氟化锶、氟化钙、醋酸铯、醋酸钾或碳酸铯。也就是说，盐类S选自于氟化铯、氟化钡、氟化镁、氟化锶、氟化钙、醋酸铯、醋酸钾及碳酸铯所组成的族群中的至少一种或任意组合。However, those skilled in the art of this embodiment can also understand that the technology of this embodiment is not limited thereto. For example, the salt S includes an organic metal salt or an inorganic metal salt. In addition, the salt S includes an alkali gold (IA) salt or an alkaline earth (IIA) salt. In addition, when the salt S is an inorganic metal salt, the salt S may include sodium chloride (sodium chloride, NaCl), lithium fluoride (lithium fluoride, LiF), cesium fluoride (cesium fluoride, CsF), lithium oxide (lithium oxide, Li2 O), barium fluoride (BaF2 ), strontium fluoride (CrF2 ), magnesium fluoride (magnesium fluoride, MgF 2 ), calcium fluoride (calcium fluoride, CaF2 ) or calcium oxide (CaO). That is to say, the salt S is selected from the group consisting of sodium chloride, lithium fluoride, cesium fluoride, lithium oxide, barium fluoride, strontium fluoride, magnesium fluoride, calcium fluoride and calcium oxide. One or any combination. In addition, when the salt S is an organic metal salt, the salt may include alkyllithium (alkyllithium), cesium carbonate (cesium carbonate, CsCO3 ), cesium acetate (cesium acetate, H3 COOCs), potassium acetate (potassium acetate , H3 COOK) or sodium acetate (sodium acetate, H3 COONa). That is to say, the salt S is at least one or any combination selected from the group consisting of alkyllithium, cesium carbonate, cesium acetate, potassium acetate and sodium acetate. Furthermore, the atomic number of the metal of the salt S may be greater than or equal to 19, and the salt S includes cesium fluoride, barium fluoride, magnesium fluoride, strontium fluoride, calcium fluoride, cesium acetate, potassium acetate or cesium carbonate . That is to say, the salt S is at least one or any combination selected from the group consisting of cesium fluoride, barium fluoride, magnesium fluoride, strontium fluoride, calcium fluoride, cesium acetate, potassium acetate and cesium carbonate .
至于有机材料M的运作功能方面在此简单说明如下。有机材料M可传输电子，且有机材料M的电子迁移率大致上大于10-6(cm2/VS)。此外，有机材料M可同时传输电子及空穴，且有机材料M的电子及空穴迁移率皆大致上大于10-6(cm2/VS)。The operation function of the organic material M is briefly described as follows. The organic material M can transport electrons, and the electron mobility of the organic material M is substantially greater than 10−6 (cm2 /VS). In addition, the organic material M can transport electrons and holes at the same time, and the electron and hole mobilities of the organic material M are both substantially greater than 10−6 (cm2 /VS).
需要注意的是，基于盐类S在电子源16中具有一随空间分布变化的浓度C1，以及盐类S在电子源16邻近于阴极13处的浓度X1大于盐类在电子源16邻近于发光层14处的浓度X2的前提下，电子源14可只由一种有机材料及一种盐类所构成。此外，电子源14可由一种有机材料及多种不同的盐类所构成。另外，电子源14可由多种不同的有机材料及一种盐类所构成。再者，电子源14可由多种不同的有机材料及多种不同的盐类所构成。It should be noted that, based on the fact that the salt S has a concentration C1 that varies with the spatial distribution in the electron source 16, and the concentration X1 of the salt S at the electron source 16 adjacent to the cathode 13 is greater than that of the salt S at the electron source 16 adjacent to the luminescence Under the premise of the concentration X2 at the layer 14, the electron source 14 can be composed of only one organic material and one salt. In addition, the electron source 14 can be composed of an organic material and various salts. In addition, the electron source 14 can be composed of various organic materials and a salt. Furthermore, the electron source 14 can be composed of various organic materials and various salts.
上述的阳极12及阴极13包含金属、金属合金或透明导电材料，且阳极12及阴极13之中至少一电极为透明或半透明电极。上述的透明导电材料包含铟锡氧化物(indium tin oxide，ITO)、铟锌氧化物(indium zinc oxide，IZO)、镉锡氧化物(cadmium tin oxide，CTO)、氧化锡(stannic dioxide，SnO2)及氧化锌(zinc oxide，ZnO)等类似的透明金属氧化物，上述的金属及金属合金包含金(aurum，Au)、银(silver，Ag)、铝(aluminum，Al)、铟(indium，In)、镁(magnesium，Mg)及钙(calcium，Ca)等。其中，阴极13可以为导电度大于100的导体、功函数在4.2电子伏特(eV)以下的金属、或混有功函数为4.2(eV)的金属的金属合金。The above-mentioned anode 12 and cathode 13 include metal, metal alloy or transparent conductive material, and at least one of the anode 12 and cathode 13 is a transparent or translucent electrode. The above-mentioned transparent conductive materials include indium tin oxide (ITO), indium zinc oxide (IZO), cadmium tin oxide (CTO), tin oxide (stannic oxide, SnO2 ) and similar transparent metal oxides such as zinc oxide (ZnO), the above-mentioned metals and metal alloys include gold (aurum, Au), silver (silver, Ag), aluminum (aluminum, Al), indium (indium, In), magnesium (magnesium, Mg) and calcium (calcium, Ca), etc. Wherein, the cathode 13 can be a conductor with a conductivity greater than 100, a metal with a work function below 4.2 electron volts (eV), or a metal alloy mixed with a metal with a work function of 4.2 (eV).
当只有阳极12为透明或半透明时，阴极13可以为反射性金属，则有机电激发光元件10为下单面发光元件(bottom emissive device)，且基板11必须为透明或半透明基板。当只有阴极13为透明或半透明时，阳极12可以为反射性金属，则有机电激发光元件10为上单面发光元件(top emissivedevice)，且基板11可为透明、半透明或非透明基板。当阳极12及阴极13为透明或半透明时，有机电激发光元件10为上下双面发光元件(dual emissivedevice)，且基板11必须为透明或半透明基板。When only the anode 12 is transparent or translucent, the cathode 13 can be a reflective metal, then the organic electroluminescent device 10 is a bottom emissive device, and the substrate 11 must be a transparent or translucent substrate. When only the cathode 13 is transparent or translucent, the anode 12 can be a reflective metal, then the organic electroluminescent element 10 is a top emissive device, and the substrate 11 can be transparent, translucent or non-transparent substrate . When the anode 12 and the cathode 13 are transparent or translucent, the organic electroluminescent device 10 is a dual emissive device, and the substrate 11 must be a transparent or translucent substrate.
本实施例的显示装置10可以应用在计算机屏幕、平面电视、监控屏幕、车用型电视、移动电话、掌上型游戏装置、数码相机(digital camera，DC)、数码摄录像机(digital video，DV)、数字播放装置、个人数字助理(personaldigital assistant，PDA)、联网机(webpad)、笔记型计算机(notebook)、掌上型计算机、膝上型计算机、平板式计算机(Table PC)、可携式图像播放装置、视频摄影机、可携式信息终端装置、数字视频盘片播放装置及投射装置等电子产品上。The display device 10 of the present embodiment can be applied in computer screens, flat-screen TVs, monitoring screens, car TVs, mobile phones, handheld game devices, digital cameras (digital camera, DC), digital video recorders (digital video, DV) , digital playback device, personal digital assistant (personaldigital assistant, PDA), networked machine (webpad), notebook computer (notebook), palmtop computer, laptop computer, tablet computer (Table PC), portable image player Devices, video cameras, portable information terminal devices, digital video disc playback devices and projection devices and other electronic products.
在本实施例中，电子源16是以具有电子传输能力的有机材料混以原子序大于17的碱金或碱土族金属盐类而成。由于碱金、碱土族金属盐已不似其金属态时那么具有高活性，因此不会遇到在先前技艺中难以应用在实际工艺上的问题。此外，电子源16的性质介于纯盐单层和纯有机单层之间，对于原先有机材料/盐类之间的异质界面具有整合的效果。另外，当掺杂在电子源16中的盐类的金属原子序大于或等于17时，由于此金属离子的体积较大，故和阴离子间的离子键会较弱。当掺杂在电子源16中会产生于近似于掺杂纯金属离子的效果，因而大幅增进有机材料的导电率及电子传输能力。相反地，当金属的原子序小于17时，则可能因为和带负电离子间的离子键太强而不易游离成金属态的离子，但本实施例并不局限在此。In this embodiment, the electron source 16 is formed by mixing organic materials with electron transport capability with alkali gold or alkaline earth metal salts with an atomic number greater than 17. Since alkali gold and alkaline earth metal salts are not as highly active as their metal state, they will not encounter the problems that are difficult to apply to practical processes in the prior art. In addition, the properties of the electron source 16 are between pure salt monolayers and pure organic monolayers, and have an integrated effect on the heterogeneous interface between the original organic materials/salts. In addition, when the metal atomic number of the salt doped in the electron source 16 is greater than or equal to 17, the ionic bond between the metal ion and the anion will be weak due to the large volume of the metal ion. When the electron source 16 is doped, it will produce an effect similar to that of doping pure metal ions, thereby greatly improving the conductivity and electron transport capability of the organic material. Conversely, when the atomic number of the metal is less than 17, it may not be easy to dissociate into metal ions because the ionic bond with the negatively charged ions is too strong, but the present embodiment is not limited thereto.
以上各点观之，本实施例的电子源16具有良好的电子注入效率及电子传输能力，并请改善了先前技艺中的诸多缺点。In view of the above points, the electron source 16 of this embodiment has good electron injection efficiency and electron transport capability, and has improved many shortcomings in the prior art.
实施例二Embodiment two
请参照图2，绘示乃依照本发明的实施例二的包含有机电激发光元件的显示装置的剖面图。本实施例的显示装置20与实施例一的显示装置10不同之处在于有机电激发光元件29，而本实施例的有机电激发光元件29与实施例一的有机电激发光元件19不同之处在于电子源26。至于其它相同的构成要件，继续沿用标号，并不再赘述。Please refer to FIG. 2 , which shows a cross-sectional view of a display device including an organic electroluminescent element according to Embodiment 2 of the present invention. The difference between the display device 20 of the present embodiment and the display device 10 of the first embodiment lies in the organic electroluminescent element 29, and the organic electroluminescent element 29 of the present embodiment is different from the organic electroluminescent element 19 of the first embodiment At the electron source 26 . As for the other same constituent elements, the reference numerals will continue to be used and will not be repeated.
在图2中，电子源26设置于阴极13与发光层14之间，由至少一有机材料M及至少一盐类S所构成。盐类S在电子源26中具有一随空间分布变化的浓度C2，致使盐类S在电子源16邻近于阴极13处的浓度Y1大于在电子源26邻近于发光层14处的浓度Y2。如此一来，可以提升电子源26的电子注入效率及电子传输能力，而降低有机电激发光元件29的操作电压，且延长有机电激发光元件29的操作寿命。In FIG. 2 , the electron source 26 is disposed between the cathode 13 and the light emitting layer 14 , and is composed of at least one organic material M and at least one salt S. The salt S has a spatially variable concentration C2 in the electron source 26 such that the concentration Y1 of the salt S at the electron source 16 adjacent to the cathode 13 is greater than the concentration Y2 at the electron source 26 adjacent to the light-emitting layer 14 . In this way, the electron injection efficiency and electron transport capability of the electron source 26 can be improved, the operating voltage of the organic electroluminescent element 29 can be reduced, and the operating life of the organic electroluminescent element 29 can be extended.
在本实施例中，电子源26包括一第一层26a、一第二层26b及一第三层26c，第一层26a及第二层26b分别邻接阴极13及发光层14，盐类S在第一层26a中的浓度Y1大于盐类S在第二层26b中的浓度Y2。第三层26c设置于第一层26a及第二层26b之间，盐类S在第三层26c中的浓度Y3介于盐类S在第一层26a中的浓度Y1及盐类S在第二层26b中的浓度Y2之间。In this embodiment, the electron source 26 includes a first layer 26a, a second layer 26b and a third layer 26c, the first layer 26a and the second layer 26b are respectively adjacent to the cathode 13 and the light emitting layer 14, the salt S is in The concentration Y1 in the first layer 26a is greater than the concentration Y2 of the salt S in the second layer 26b. The third layer 26c is arranged between the first layer 26a and the second layer 26b, and the concentration Y3 of the salt S in the third layer 26c is between the concentration Y1 of the salt S in the first layer 26a and the concentration Y3 of the salt S in the first layer 26a. between the concentration Y2 in the second layer 26b.
当Y1及Y2实质上分别为100wt％及0wt％时，表示第一层26a完全由盐类S所构成，不含任何有机材料M。而第二层26b完全由有机材料M所构成，不含任何盐类S。并且，第三层26c由有机材料M及盐类S所共同构成，盐类S在第三层26c中的浓度Y3实质上介于0wt％及100wt％之间。其中，当Y1实质上为100wt％时，Y2实质上可不为0wt％。此外，当Y2实质上为0wt％时，Y1实质上可不为100wt％。When Y1 and Y2 are substantially 100 wt % and 0 wt % respectively, it means that the first layer 26 a is completely composed of salts S without any organic material M. The second layer 26b is entirely composed of organic materials M without any salt S. Moreover, the third layer 26c is jointly composed of the organic material M and the salt S, and the concentration Y3 of the salt S in the third layer 26c is substantially between 0wt% and 100wt%. Wherein, when Y1 is substantially 100 wt%, Y2 may not be substantially 0 wt%. In addition, when Y2 is substantially 0 wt%, Y1 may not be substantially 100 wt%.
然本实施例所属技术领域中的技术人员亦可以明了本实施例的技术并不局限在此，例如Y1及Y2实质上不分别为100wt％及0wt％时，第一层26a、第二层26b及第三层26c可由一种有机材料及一种盐类所构成。此外，第一层26a、第二层26b及第三层26c可由一种有机材料及多种不同的盐类所构成。另外，第一层26a、第二层26b及第三层26c可由多种不同的有机材料及一种盐类所构成。再者，第一层26a、第二层26b及第三层26c可由多种不同的有机材料及多种不同的盐类所构成。其中，第一层26a、第二层26b及第三层26c的盐类可相同或不同，第一层26a、第二层26b及第三层26c的有机材料可相同或不同。However, those skilled in the technical field of this embodiment can also understand that the technology of this embodiment is not limited thereto. For example, when Y1 and Y2 are not substantially 100wt% and 0wt%, respectively, the first layer 26a and the second layer 26b And the third layer 26c may be composed of an organic material and a salt. In addition, the first layer 26a, the second layer 26b and the third layer 26c may be composed of one organic material and various salts. In addition, the first layer 26a, the second layer 26b and the third layer 26c may be composed of various organic materials and a salt. Furthermore, the first layer 26a, the second layer 26b and the third layer 26c may be composed of various organic materials and various salts. The salts of the first layer 26a, the second layer 26b and the third layer 26c may be the same or different, and the organic materials of the first layer 26a, the second layer 26b and the third layer 26c may be the same or different.
当Y1及Y2实质上分别为100wt％及0wt％时，第一层26a可由一种或多种不同的盐类所构成，第二层26b可由一种或多种不同的有机材料所构成。此外，第三层26c可由一种有机材料及多种不同的盐类所构成。另外，第三层26c可由多种不同的有机材料及一种盐类所构成。再者，第三层26c可由多种不同的有机材料及多种不同的盐类所构成。其中，第一层26a及第三层26c的盐类可相同或不同，第二层26b及第三层26c的有机材料可相同或不同。When Y1 and Y2 are substantially 100wt% and 0wt% respectively, the first layer 26a may be formed of one or more different salts, and the second layer 26b may be formed of one or more different organic materials. In addition, the third layer 26c can be composed of an organic material and various salts. In addition, the third layer 26c can be composed of various organic materials and a salt. Furthermore, the third layer 26c can be composed of various organic materials and various salts. Wherein, the salts of the first layer 26a and the third layer 26c may be the same or different, and the organic materials of the second layer 26b and the third layer 26c may be the same or different.
虽然本实施例以盐类S在第三层26c中的浓度Y3介于盐类S在第一层26a中的浓度Y1及盐类S在第二层26b中的浓度Y2之间为例作说明，但本实施例的技术并不局限在此。例如，盐类S在第三层26c中的浓度Y3可以等同于盐类S在第一层26a中的浓度Y1，但大于盐类S在第二层26b中的浓度Y2。或者是，盐类S在第三层26c中的浓度Y3可以等同于盐类S在第二层26b中的浓度Y2，但小于盐类S在第一层26a中的浓度Y1。Although the present embodiment takes the concentration Y3 of the salt S in the third layer 26c as an example between the concentration Y1 of the salt S in the first layer 26a and the concentration Y2 of the salt S in the second layer 26b , but the technology of this embodiment is not limited thereto. For example, the concentration Y3 of the salt S in the third layer 26c may be equal to the concentration Y1 of the salt S in the first layer 26a, but greater than the concentration Y2 of the salt S in the second layer 26b. Alternatively, the concentration Y3 of the salt S in the third layer 26c may be equal to the concentration Y2 of the salt S in the second layer 26b, but smaller than the concentration Y1 of the salt S in the first layer 26a.
实施例三Embodiment three
请参照图3，绘示乃依照本发明的实施例三的包含有机电激发光元件的显示装置的剖面图。本实施例的显示装置30与实施例二的显示装置20不同之处在于有机电激发光元件39，而本实施例的有机电激发光元件39与实施例二的有机电激发光元件29不同之处在于电子源36。至于其它相同的构成要件，继续沿用标号，并不再赘述。Please refer to FIG. 3 , which shows a cross-sectional view of a display device including an organic electroluminescent element according to
在图3中，电子源36设置于阴极13与发光层14之间，由至少一有机材料M及至少一盐类S所构成。盐类S在电子源36中具有一随空间分布变化的浓度C3，致使盐类S在电子源36邻近于阴极13处的浓度大于在电子源36邻近于发光层14处的浓度。如此一来，可以提升电子源36的电子注入效率及电子传输能力，而降低有机电激发光元件39的操作电压，且延长有机电激发光元件39的操作寿命。In FIG. 3 , the electron source 36 is disposed between the cathode 13 and the light emitting layer 14 , and is composed of at least one organic material M and at least one salt S. The salt S has a spatially variable concentration C3 in the electron source 36 such that the concentration of the salt S is greater at the electron source 36 adjacent to the cathode 13 than at the electron source 36 adjacent to the light-emitting layer 14 . In this way, the electron injection efficiency and electron transport capability of the electron source 36 can be improved, the operating voltage of the organic electroluminescent element 39 can be reduced, and the operating life of the organic electroluminescent element 39 can be extended.
在本实施例中，电子源36包括数层，盐类S在此些层中的浓度变化，从邻接阴极13的一层中的高浓度往邻接于发光层14的另一层中的低浓度逐渐递减。例如，盐类S的浓度由邻接阴极13的一层往邻接于发光层14的另一层逐层递减。此外，在电子源36中，除了与阴极13及发光层14邻接的那二层之外，盐类S在其余相邻或不相邻的任意二层的浓度可以是相同的。In this embodiment, the electron source 36 comprises several layers in which the concentration of the salt S varies from a high concentration in one layer adjacent to the cathode 13 to a low concentration in another layer adjacent to the light-emitting layer 14. Decrease gradually. For example, the concentration of the salt S decreases layer by layer from one layer adjacent to the cathode 13 to another layer adjacent to the light emitting layer 14 . In addition, in the electron source 36, except for the two layers adjacent to the cathode 13 and the light emitting layer 14, the concentration of the salt S in any two adjacent or non-adjacent layers can be the same.
假设电子源36包含N层，由层36(1)～36(N)所组成，N的值为大于3的正整数。层36(1)及36(N)分别邻接阴极13及发光层14，盐类S在层36(1)中的浓度为Z(1)，即盐类S在电子源36邻近于阴极13处的浓度。盐类S在层36(N)中的浓度为Z(N)，即盐类S在电子源36邻近于发光层14处的浓度。因此，盐类S在电子源36邻近于阴极13处的浓度Z(1)大于盐类在电子源36邻近于发光层14处的浓度Z(N)。层36(i)设置于层36(i-1)及36(i+1)之间，i的值为2～N-1，盐类S在层36(i)中的浓度Z(i)小于盐类S在层36(i-1)中的浓度Z(i-1)，但大于盐类S在层36(i+1)中的浓度Z(i+1)。其中，盐类S在层36(2)中的浓度Z(2)可小于或等于盐类S在层36(1)中的浓度Z(1)，盐类S在层36(N-1)中的浓度Z(N-1)可大于或等于盐类S在层36(N)中的浓度Z(N)。Assume that the electron source 36 includes N layers, composed of layers 36(1)-36(N), where the value of N is a positive integer greater than 3. Layers 36(1) and 36(N) are respectively adjacent to the cathode 13 and the light-emitting layer 14, and the concentration of the salt S in the layer 36(1) is Z(1), that is, the salt S is at the electron source 36 adjacent to the cathode 13 concentration. The concentration of salt S in layer 36(N) is Z(N), ie the concentration of salt S at electron source 36 adjacent to light-emitting layer 14 . Therefore, the concentration Z(1) of the salt S at the electron source 36 adjacent to the cathode 13 is greater than the concentration Z(N) of the salt at the electron source 36 adjacent to the light-emitting layer 14 . Layer 36(i) is arranged between layers 36(i-1) and 36(i+1), the value of i is 2 to N-1, and the concentration Z(i) of salt S in layer 36(i) is less than the concentration Z(i-1) of salt S in layer 36(i-1), but greater than the concentration Z(i+1) of salt S in layer 36(i+1). Wherein, the concentration Z(2) of salt S in layer 36(2) may be less than or equal to the concentration Z(1) of salt S in layer 36(1), and the concentration Z(1) of salt S in layer 36(N-1) The concentration Z(N-1) in the layer 36(N) may be greater than or equal to the concentration Z(N) of the salt S in the layer 36(N).
当Z(1)及Z(N)实质上分别为100wt％及0wt％时，表示层36(1)完全由盐类S所构成，不含任何有机材料M。而层36(N)完全由有机材料M所构成，不含任何盐类S。并且，层36(i)由有机材料M及盐类S所共同构成。其中，当Z(1)实质上为100wt％时，Z(N)实质上可不为0wt％。此外，当Z(N)实质上为0wt％时，Z(1)实质上可不为100wt％。When Z(1) and Z(N) are substantially 100wt% and 0wt% respectively, the representation layer 36(1) is completely composed of salt S without any organic material M. The layer 36(N) is entirely composed of organic material M without any salt S. Furthermore, the layer 36(i) is composed of the organic material M and the salt S together. Wherein, when Z(1) is substantially 100 wt%, Z(N) may not be substantially 0 wt%. In addition, when Z(N) is substantially 0 wt%, Z(1) may not be substantially 100 wt%.
然本实施例所属技术领域中的技术人员亦可以明了本实施例的技术并不局限在此，例如Z(1)及Z(N)实质上不分别为100wt％及0wt％时，层36(1)～36(N)可由一种有机材料及一种盐类所构成。此外，层36(1)～36(N)可由一种有机材料及多种不同的盐类所构成。另外，层36(1)～36(N)可由多种不同的有机材料及一种盐类所构成。再者，层36(1)～36(N)可由多种不同的有机材料及多种不同的盐类所构成。其中，层36(1)～36(N)的各层的盐类可相同或不同，层36(1)～36(N)的各层的有机材料可相同或不同。However, those skilled in the technical field of this embodiment can also understand that the technology of this embodiment is not limited thereto. For example, when Z(1) and Z(N) are not substantially 100 wt% and 0 wt% respectively, the layer 36 ( 1)-36(N) can be composed of an organic material and a salt. In addition, layers 36(1)-36(N) may be composed of an organic material and various salts. In addition, layers 36(1)-36(N) may be composed of various organic materials and a salt. Furthermore, the layers 36(1)-36(N) can be composed of various organic materials and various salts. The salts of the layers 36(1)-36(N) may be the same or different, and the organic materials of the layers 36(1)-36(N) may be the same or different.
当Z(1)及Z(N)实质上分别为100wt％及0wt％时，层36(1)可由一种或多种不同的盐类所构成，层36(N)可由一种或多种不同的有机材料所构成。此外，层36(i)可由一种有机材料及多种不同的盐类所构成，i的值为2～N-1。另外，层36(i)可由多种不同的有机材料及一种盐类所构成，i的值为2～N-1。再者，层36(i)可由多种不同的有机材料及多种不同的盐类所构成，i的值为2～N-1。其中，层36(1)及36(i)的盐类可相同或不同，层36(N)及36(i)的有机材料可相同或不同，i的值为2～N-1。When Z(1) and Z(N) are substantially 100wt% and 0wt% respectively, layer 36(1) may be composed of one or more different salts, and layer 36(N) may be composed of one or more Made of different organic materials. In addition, the layer 36(i) can be composed of one organic material and a plurality of different salts, and the value of i is 2˜N−1. In addition, the layer 36(i) can be composed of various organic materials and a kind of salt, and the value of i is 2˜N−1. Furthermore, the layer 36(i) can be composed of various organic materials and various salts, and the value of i is 2˜N−1. The salts of layers 36(1) and 36(i) can be the same or different, the organic materials of layers 36(N) and 36(i) can be the same or different, and the value of i is 2˜N-1.
至于上述实施例的电子源的电子注入效率及电子传输能力，在此以有机发光元件19的电子源16为例作说明，并制作红色(R)元件、绿色(G)元件及蓝色元件(B)等实施例元件。此外，本实施例的各色元件与一比较例中各色元件对应比较各色元件的操作电压及发光亮度的关系。在本实施例中，本实施例的各色元件分别以铟锡氧化物(indium tin oxide，ITO)、氟化锂(LiF)及铝(Al)所构成的复合阴极作为阳极12及阴极13，并分别以氟化铯及Dinaphthyl anthrathene(ADN)为盐类S及有机材料M，构成上述的电子源16。其中，分别以RGB发光材料当作本实施例及比较例中红色元件、绿色元件及蓝色元件的发光层。铯为原子序55的碱金族金属，而氟化铯在电子源16中的掺杂比例实质上为20wt％，且ADN是一种同时具有传输电子及空穴能力的有机材料。此外，比较例各色元件与本实施例各色元件不同之处在于电子源，比较例元件的电子源仅以传统的有机材料当作电子传输层，如8-tris-hydroxyquinoline aluminum(Alq3)。将不同的操作电压施加在本实施例各色元件及比较例各色元件上，以观察本实施例各色元件及比较例各色元件在不同操作电压下的发光亮度。As for the electron injection efficiency and electron transport capability of the electron source of the above-mentioned embodiment, the electron source 16 of the organic light-emitting element 19 is taken as an example for illustration, and a red (R) element, a green (G) element and a blue element ( B) and other embodiment elements. In addition, the relationship between the operating voltage and the luminous brightness of each color element is compared between each color element of this embodiment and each color element in a comparative example. In this embodiment, each color element of this embodiment uses a composite cathode composed of indium tin oxide (indium tin oxide, ITO), lithium fluoride (LiF) and aluminum (Al) as the anode 12 and the cathode 13, and The above-mentioned electron source 16 is composed of cesium fluoride and Dinaphthyl anthrathene (ADN) as the salt S and the organic material M respectively. Wherein, RGB light-emitting materials are used as the light-emitting layers of the red element, the green element and the blue element in this embodiment and the comparative example, respectively. Cesium is an alkali metal with an atomic number of 55, and the doping ratio of cesium fluoride in the electron source 16 is substantially 20 wt%, and ADN is an organic material capable of transporting both electrons and holes. In addition, the difference between the devices of the comparative example and the devices of the present embodiment lies in the electron source. The electron source of the device of the comparative example only uses traditional organic materials as the electron transport layer, such as 8-tris-hydroxyquinoline aluminum (Alq3 ). Different operating voltages were applied to the various color elements of this embodiment and the various color elements of the comparative example to observe the luminance of the various color elements of the present embodiment and the various color elements of the comparative example under different operating voltages.
请同时参照图4A～4C，其绘示乃本实施例各色元件及比较例各色元件于操作电压及发光亮度的关系曲线上的比较示意图。从图4A～4C可以知道，在操作电压3～6伏特(V)之间下，若以同一操作电压施加在本实施例各色元件及比较例各色元件上，可以发现本实施例各色元件及比较例各色元件的发光亮度对应地较比较例各色元件的发光亮度还要高。换言之，若要使本实施例各色元件及比较例各色元件对应地具有相同的发光亮度时，本实施例各色元件所需的操作电压对应地较比较例各色元件所需的操作电压还要低。所以，本实施例的电子源16确实较比较例的电子传输层具有较佳的电子注入效率及电子传输能力，且本实施例各色元件在使用电子源16后，可以大大地降低所需的操作电压。至于电子源26及36亦同样具有良好的电子注入效率及电子传输能力，且有机电激发光元件29及39分别使用电子源26及36后，一样可以大大地降低所需的操作电压。Please refer to FIGS. 4A-4C at the same time, which are schematic diagrams showing the comparison of the relationship between the operating voltage and the luminance of each color element of this embodiment and each color element of the comparative example. From Figures 4A to 4C, it can be seen that under an operating voltage of 3 to 6 volts (V), if the same operating voltage is applied to the various color elements of this embodiment and the various color elements of the comparative example, it can be found that the various color elements of this embodiment and the comparison Correspondingly, the luminous brightness of each color element of the example is higher than that of each color element of the comparative example. In other words, to make the elements of the embodiment and the elements of the comparative example have the same luminance, the operating voltage required by the elements of the embodiment is lower than that of the elements of the comparative example. Therefore, the electron source 16 of this embodiment does have better electron injection efficiency and electron transport capability than the electron transport layer of the comparative example, and the use of the electron source 16 for various elements of this embodiment can greatly reduce the required operation. Voltage. The electron sources 26 and 36 also have good electron injection efficiency and electron transport capability, and the organic electroluminescent elements 29 and 39 use the electron sources 26 and 36 respectively, which can also greatly reduce the required operating voltage.
因此，不管是红色元件、绿色元件或蓝色元件，本实施例各色元件在操作电压及发光亮度的关系曲线上比比较例各色元件在操作电压及发光亮度的关系曲线有左移的现象。这代表本实施例各色元件在使用本实施例的电子源16后，其操作电压都获得下降。Therefore, regardless of whether it is a red element, a green element or a blue element, the relationship curve between the operating voltage and the luminous brightness of each color element of this embodiment is shifted to the left compared with the relationship curve of each color element of the comparative example. This means that the operating voltages of the various elements of this embodiment are reduced after using the electron source 16 of this embodiment.
本发明上述实施例所揭露的有机电激发光元件及包含有机电激发光元件的显示装置，其盐类在电子源中具有一随空间分布变化的浓度的设计，可以致使盐类在电子源邻近于阴极处的浓度大于盐类在电子源邻近于发光层处的浓度。如此一来，可以提升电子源的电子注入效率及电子传输能力，而降低元件的操作电压，且延长元件的操作寿命。The organic electroluminescence element and the display device comprising the organic electroluminescence element disclosed in the above-mentioned embodiments of the present invention have a design in which the concentration of the salt in the electron source varies with the spatial distribution, which can cause the salt to be in the vicinity of the electron source The concentration at the cathode is greater than the concentration of the salt at the electron source adjacent to the emissive layer. In this way, the electron injection efficiency and electron transport capability of the electron source can be improved, the operating voltage of the element can be reduced, and the operating life of the element can be extended.
虽然上述实施例以电子源应用在有机电激发光元件上为例作说明上，但上述实施例所揭露的电子源亦可应用其它需要电子注入及传输功能的电子产品上。Although the above embodiments are described by taking the application of the electron source on the organic electroluminescent device as an example, the electron source disclosed in the above embodiments can also be applied to other electronic products that require electron injection and transport functions.
综上所述，虽然本发明以优选实施例揭露如上，然而其并非用以限定本发明，本领域的技术人员在不脱离本发明的精神和范围内，可作些许的更动与润饰，因此本发明的保护范围应当以后附的权利要求所界定者为准。In summary, although the present invention is disclosed above with preferred embodiments, it is not intended to limit the present invention. Those skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, The scope of protection of the present invention should be defined by the appended claims.
Claims (22)
Translated fromChinesePriority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100927615ACN100508679C (en) | 2005-08-23 | 2005-08-23 | Organic electroluminescent element and display device comprising the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100927615ACN100508679C (en) | 2005-08-23 | 2005-08-23 | Organic electroluminescent element and display device comprising the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1753592Atrue CN1753592A (en) | 2006-03-29 |
| CN100508679C CN100508679C (en) | 2009-07-01 |
Family
ID=36680213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100927615AExpired - LifetimeCN100508679C (en) | 2005-08-23 | 2005-08-23 | Organic electroluminescent element and display device comprising the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100508679C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101241972B (en)* | 2007-02-09 | 2011-09-14 | 三星电子株式会社 | Display device |
| CN103050636A (en)* | 2011-10-17 | 2013-04-17 | 海洋王照明科技股份有限公司 | Top emission organic electroluminescence diode and manufacturing method thereof |
| CN104051650A (en)* | 2013-03-15 | 2014-09-17 | 海洋王照明科技股份有限公司 | Organic electroluminescent device and preparation method thereof |
| CN104064680A (en)* | 2013-03-21 | 2014-09-24 | 海洋王照明科技股份有限公司 | Organic electroluminescent device and preparation method thereof |
| CN104617223A (en)* | 2015-02-03 | 2015-05-13 | 京东方科技集团股份有限公司 | Organic light-emitting diode device, manufacturing method thereof and evaporation facility |
| CN106784355A (en)* | 2016-12-29 | 2017-05-31 | 深圳市华星光电技术有限公司 | laminated organic electroluminescent device |
| CN106972107A (en)* | 2015-11-30 | 2017-07-21 | 乐金显示有限公司 | Organic Light Emitting Diode and the organic LED display device including it |
| CN112117389A (en)* | 2015-10-27 | 2020-12-22 | 三星显示有限公司 | Organic electroluminescent device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3266573B2 (en)* | 1998-04-08 | 2002-03-18 | 出光興産株式会社 | Organic electroluminescence device |
| EP1285957A3 (en)* | 2001-08-20 | 2005-12-21 | TDK Corporation | Organic electroluminescent device and method of its preparation |
| EP1487029B1 (en)* | 2003-06-13 | 2011-09-21 | Semiconductor Energy Laboratory Co., Ltd. | Electron injection composition for organic light emitting element |
- 2005
- 2005-08-23CNCNB2005100927615Apatent/CN100508679C/ennot_activeExpired - Lifetime
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8564195B2 (en) | 2007-02-09 | 2013-10-22 | Samsung Display Co., Ltd. | Display device |
| CN101241972B (en)* | 2007-02-09 | 2011-09-14 | 三星电子株式会社 | Display device |
| CN103050636A (en)* | 2011-10-17 | 2013-04-17 | 海洋王照明科技股份有限公司 | Top emission organic electroluminescence diode and manufacturing method thereof |
| CN104051650A (en)* | 2013-03-15 | 2014-09-17 | 海洋王照明科技股份有限公司 | Organic electroluminescent device and preparation method thereof |
| CN104064680A (en)* | 2013-03-21 | 2014-09-24 | 海洋王照明科技股份有限公司 | Organic electroluminescent device and preparation method thereof |
| US10707418B2 (en) | 2015-02-03 | 2020-07-07 | Boe Technology Group Co., Ltd. | Organic light-emitting diode device, manufacturing method thereof and evaporation equipment |
| CN104617223A (en)* | 2015-02-03 | 2015-05-13 | 京东方科技集团股份有限公司 | Organic light-emitting diode device, manufacturing method thereof and evaporation facility |
| US20160225990A1 (en)* | 2015-02-03 | 2016-08-04 | Boe Technology Group Co., Ltd. | Organic light-emitting diode device, manufacturing method thereof and evaporation equipment |
| US9716228B2 (en) | 2015-02-03 | 2017-07-25 | Boe Technology Group Co., Ltd. | Organic light-emitting diode device, manufacturing method thereof and evaporation equipment |
| CN104617223B (en)* | 2015-02-03 | 2017-12-08 | 京东方科技集团股份有限公司 | Organic light emitting diode device and preparation method thereof and evaporated device |
| CN112117389B (en)* | 2015-10-27 | 2024-09-20 | 三星显示有限公司 | Organic electroluminescent device |
| CN112117389A (en)* | 2015-10-27 | 2020-12-22 | 三星显示有限公司 | Organic electroluminescent device |
| CN106972107A (en)* | 2015-11-30 | 2017-07-21 | 乐金显示有限公司 | Organic Light Emitting Diode and the organic LED display device including it |
| CN106972107B (en)* | 2015-11-30 | 2019-08-13 | 乐金显示有限公司 | Organic Light Emitting Diode, its manufacturing method and the organic LED display device including the Organic Light Emitting Diode |
| US12213334B2 (en) | 2015-11-30 | 2025-01-28 | Lg Display Co., Ltd. | Organic emitting diode and organic light emitting diode display device including the same |
| CN106784355B (en)* | 2016-12-29 | 2019-10-18 | 深圳市华星光电技术有限公司 | Laminated organic electroluminescent device |
| US10147899B2 (en) | 2016-12-29 | 2018-12-04 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Tandem organic electroluminescent element |
| CN106784355A (en)* | 2016-12-29 | 2017-05-31 | 深圳市华星光电技术有限公司 | laminated organic electroluminescent device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100508679C (en) | 2009-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6022529B2 (en) | Organic electroluminescent device and organic electroluminescent display device | |
| CN108550614B (en) | Organic light emitting display panel and display device thereof | |
| CN1223238C (en) | Electroluminescent display device | |
| CN1610463A (en) | Organic Electroluminescence Display Device | |
| CN1615059A (en) | Full-color electroluminescent display | |
| US10615355B2 (en) | Organic light-emitting display panel and display device | |
| CN1836332A (en) | Circuit arrangement for AC driving of organic diodes | |
| CN108539034B (en) | Organic light emitting display panel and organic light emitting display device | |
| CN1670981A (en) | Organic light emitting diode and display panel and communication device including same | |
| CN101051674A (en) | Image display system including electroluminescent device and manufacturing method thereof | |
| CN107134256A (en) | Display panel and its driving method, display device | |
| CN103378297A (en) | Organic light emitting diode and display device including same | |
| CN1671258A (en) | Organic electroluminescent device and electronic instrument | |
| CN1753592A (en) | Organic electroluminescent element and display device including organic electroluminescent element | |
| US20070035235A1 (en) | Organic electroluminescent device and display incorporating the same | |
| CN1582072A (en) | Organic light-emitting double-sided display element | |
| CN1808739A (en) | Organic Electroluminescent Devices | |
| CN108767130A (en) | Organic light emitting display panel and its display device | |
| CN1674745A (en) | Organic electroluminescence element and display device including same | |
| CN107425140A (en) | A kind of OLED structure | |
| CN1638574A (en) | Organic electro-luminescence device and fabricating method thereof | |
| CN1655657A (en) | Organic electroluminescence element | |
| CN1612657A (en) | Organic Light Emitting Components | |
| CN1324361C (en) | Double-sided display device | |
| CN1845357A (en) | Organic Electroluminescent Devices |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | Granted publication date:20090701 | |
| CX01 | Expiry of patent term |