HIGH-CONCENTRATION HYDROGEN IN UNINTENTIONALLY DOPED GAN

We use nuclear reaction analysis to study hydrogen in unintentionally doped GaN, and high-concentration hydrogen, nearly 10(21) cm(-3), is d etected. Accordingly, a broad but intense infrared absorption zone wit h a peak at 2962 cm(-1) is reported, which is tentatively assigned to the stretch mode of NH: Ga complex. The complex is assumed to be one c andidate answering for background electrons in unintentionally doped G aN. (C) 1998 Elsevier Science B.V. All rights reserved.