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High quantum efficiency UV detection using a‐Se based photodetector |
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| Authors: | Tomoaki Masuzawa Masanori Onishi Ichitaro Saito Takatoshi Yamada Angel T. T. Koh Daniel H. C. Chua Shuichi Ogawa Yuji Takakuwa Yusuke Mori Tatsuo Shimosawa Ken Okano |
| Affiliation: | 1. Graduate School of Arts and Sciences, International Christian University, 3‐10‐2 Osawa Mitaka, 181‐8585 Tokyo, Japan;2. Nanotube Research Center, National Institute of Advanced Industrial Science and Technology, AIST Tsukuba Central 5, 305‐8568 Tsukuba, Japan;3. Dept. of Materials Science & Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574, Singapore;4. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2‐1‐1 Katahira, Aoba 980‐8577, Sendai, Japan;5. Dept. of Electrical Engineering, Graduate School of Engineering, Osaka University, 2‐1 Yamadaoka, Suita, Osaka 565‐0871, Japan;6. Dept. of Clinical Laboratory, Faculty of Medicine, University of Tokyo, 7‐3‐1 Hongo, Bunkyoku, 113‐8655 Tokyo, Japan |
| Abstract: | High‐sensitivity ultraviolet (UV) photodetection has been attempted by utilizing the carrier multiplication effect in amorphous selenium. The prototype photodetector presented in this Letter showed an extremely high sensitivity to UV light, so that up to 1000 carriers are generated per incident photon. This result should lead to the development of an ultrahigh‐sensitivity photodetector that can be used for spectrometric applications covering the visible to UV region. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
| Keywords: | ultraviolet photodetector amorphous selenium diamond cold cathode |