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Brief Introduction of GaN
GaN is the major material used for blue-light/green-light LED due to its ability to combine electrical parts and LED optical parts, increasing LED product efficiency.
The GaN-based LEDs grown on the sapphire substrate have... moreBrief Introduction of GaN
GaN is the major material used for blue-light/green-light LED due to its ability to combine electrical parts and LED optical parts, increasing LED product efficiency.
The GaN-based LEDs grown on the sapphire substrate have current transport along the lateral direction due to the insulating nature of the substrate. In addition, the finite resistance of the n-type GaN buffer layer causes the p–n junction current to be nonuniform and crowds near the edge of the contact.
The most frequently chosen crystallographic planes have been the R-plane, C-plane, and A-plane of sapphire. The tremendous mismatch between the lattices of GaN and sapphires can be partly overcome by the use of thin buffer layers of AlN or GaN. In spite of the lattice-matching problem, many useful optoelectronic and electronic devices can be made. #GaN #on #sapphire
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