Effect of annealing temperature on the optical properties of a bulk GaN substrateopen access
- Authors
- Lee, Hee Ae; Lee, Joo Hyung; Lee, Seung Hoon; Kang, Hyo Sang; Lee, Seong Kuk; Oh, Nu ri; Park, Won Il; Park, Jae Hwa
- Issue Date
- Oct-2020
- Publisher
- KOREAN ASSOC CRYSTAL GROWTH, INC
- Keywords
- Hydride vapor phase epitaxy; Gallium nitride; Optical property; Crystallinity; Residual stress; Defect density
- Citation
- JOURNAL OF CERAMIC PROCESSING RESEARCH, v.21, no.5, pp.609 - 614
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF CERAMIC PROCESSING RESEARCH
- Volume
- 21
- Number
- 5
- Start Page
- 609
- End Page
- 614
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/7917
- DOI
- 10.36410/jcpr.2020.21.5.609
- ISSN
- 1229-9162
- Abstract
- Variation of optical properties in a bulk GaN substrate have experimentally investigated with respect to different annealing conditions of 700 - 1,000 degrees C. As-annealed GaN was characterized by scanning electron microscopy, photoluminescence, and Raman spectroscopy. The experimental results demonstrated that the crystallinity and internal residual compressive stress of GaN are most effectively improved when heat-treated at 900 degrees C for three hours. The optical characteristics were also improved by enhancing the quality of the GaN substrate by decreasing both the defect density and the residual stress. It was also confirmed that the effect of the heat treatment was excellent given that impurities were effectively removed by this process.
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