Journal of Korean Vacuum Science & Technology
- 제4권3호
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- Pages.63-67
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- 2000
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- 1226-6167(pISSN)
Free exciton transitions and Varshni′s coeffecients for GaN epitaxial layers grown by horizontal LP - MOCVD
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Lee, Joo-in
(Nano surface Group, Korea Research Institute of Standards and Science) ;
- Leem, Jae-Young (Nano surface Group, Korea Research Institute of Standards and Science) ;
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Son, J.S.
(School of Architecture, Environment and LIfe Science, Kyungwoon University) ;
- Viswanath, A. Kasi (C-MET Panchawati)
- 발행 : 2000.10.01
초록
We have studied the photoluminescence properties of undoped epitaxial layers of GaN on sapphire substrate grown by horizontal low pressure metal organic chemical vapor deposition method in the temperature range of 9-300 K. At 9 K the spectra are dominated by the well resolved interband free excitons A and B as well as bound excitons. Temperature dependence of free exciton transitions was studied and Varshni's coefficients for the temperature variation of bandgap were determined.
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