GaN based LEDs grown by molecular beam epitaxy

Abstract
GaN based LEDs are grown on sapphire by MBE using NH3. The n- and p-type doping levels are 4×1018 and 3×1017 cm–3, respectively. LEDs turn on at 3 V, and the forward voltage is 3.7 V at 20 mA. The electroluminescence peaks at 390 nm.