| Identifiers | |
|---|---|
3D model (JSmol) |
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| Properties | |
| AlGaInP | |
| Structure | |
| Cubic | |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Aluminium gallium indium phosphide (AlGaInP, alsoAlInGaP,InGaAlP, etc.) is asemiconductor material that provides a platform for the development ofmulti-junction photovoltaics and optoelectronic devices. It has adirectbandgap ranging from ultraviolet to infrared photon energies.[1]
AlGaInP is used inheterostructures for high-brightness red, orange, green, and yellowlight-emitting diodes. It is also used to makediode lasers.
AlGaInP is typically grown byheteroepitaxy ongallium arsenide orgallium phosphide substrates in order to form aquantum well structure that can be fabricated into different devices.
| Optical properties | |
|---|---|
| Refractive index | 3.49 |
| Chromatic dispersion | -1.68 μm−1 |
| Absorption coefficient | 50536 cm−1 |
The direct bandgap of AlGaInP encompasses the energy range of visible light (1.7 eV - 3.1 eV). By selecting a specific composition of AlGaInP, the bandgap can be selected to correspond to the energy of a specific wavelength of visible light. For instance, this can be used to obtain LEDs that emit red, orange, or yellow light.[1]
Like most other III-V semiconductors and their alloys, AlGaInP possesses azincblende crystal structure.[2]
AlGaInP is used as the active material in:
AlGaInP is frequently used in LEDs for lighting systems, along withindium gallium nitride (InGaN).[citation needed]
A diode laser consists of a semiconductor material in which a p-n junction forms the active medium and optical feedback is typically provided by reflections at the device facets. AlGaInP diode lasers emit visible and near-infrared light with wavelengths of 0.63-0.76 μm.[3] The primary applications of AlGaInP diode lasers are in optical disc readers, laser pointers, and gas sensors, as well as foroptical pumping, and machining.[1]
The toxicology of AlGaInP has not been fully investigated. The dust is an irritant to skin, eyes and lungs. The environment, health and safety aspects of aluminium indium gallium phosphide sources (such astrimethylgallium,trimethylindium andphosphine) and industrial hygiene monitoring studies of standardMOVPE sources have been reported in a review.[4]