期刊
IEEE SENSORS JOURNAL
卷 10, 期 10, 页码 1609-1614出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2010.2045889
关键词
Nanorod template; noise; photodetector; ultraviolet
资金
- Center for Frontier Materials and Micro/Nano Science and Technology, National Cheng Kung University
- Advanced Optoelectronic Technology Center, National Cheng Kung University under Ministry of Education
- Bureau of Energy, Ministry of Economic Affairs of Taiwan [98-D0204-6]
We report the fabrication of GaN photodetectors (PDs) prepared on nanorod template. Using the nanorods template, it was found that we can effectively suppress leakage current, ultraviolet-to-visible rejection ratio and photoconductive gain of the PDs. With -2 V applied bias, it was found that noise equivalent power (NEP) and normalized detectivity (D*) were 7.00 x 10(-10) W and 2.26 x 10(9) cmHz(0.5)W(-1), respectively, for the PD prepared on nanorods template. With the same -2 V bias, it was found that NEP and D* were 3.56 x 10(-6) W and 4.44 x 10(5) cmHz(0.5)W(-1), respectively, for the PD prepared on a conventional sapphire substrate.
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