Journal
OPTICS EXPRESS
Volume 21, Issue 21, Pages 24599-24610Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.024599
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Funding
- National Science Council of Taiwan [NSC-100-2221-E-005-092-MY3, 102-2218-E-005-001]
- Ministry of Economic Affairs [100-EC-17-A-07-SI-158]
- Southern Taiwan Science Park [102CE06]
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This study evaluates the effect of crystallinity and point defects on time-dependent photoresponsivity and the cathodoluminescence (CL) properties of beta-Ga2O3 epilayers. A synchrotron high-resolution X-ray technique was used to understand the crystalline structure of samples. Rutherford backscattering spectroscopy was used to determine the net chemical composition of the samples to examine the type and ratio of their possible point defects. The results show that in functional time-dependent photoresponsivity of photodetectors based on beta-Ga2O3 epilayers, point defects contribution overcomes the contribution of crystallinity. However, the crystalline structure affects the intensities and emission regions of CL spectra more than point defects. (C)2013 Optical Society of America
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