Indium gallium aluminium nitride (InGaAlN, AlInGaN) is a GaN-based compound semiconductor. It is usually prepared by epitaxial growth, such as metalorganic chemical vapour deposition (MOCVD), molecular-beam epitaxy (MBE), pulsed laser deposition (PLD), etc. This material is used for specialist opto-electronics applications, often in blue laser diodes and LEDs.
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