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标题：赤色光増感型高感度15μm厚HARP光電変換膜の開発
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作者：大川裕司 ; 宮川和典 ; 松原智樹等
期刊名称：映像情報メディア学会誌
印刷版ISSN：1342-6907
电子版ISSN：1881-6908
出版年度：2008
卷号：62
期号：12
页码：2031-2036
DOI：10.3169/itej.62.2031
出版社：The Institute of Image Information and Television Engineers
摘要：HARP (High-gain Avalanche Rushing amorphous Photoconductor) photoconductive films have high sensitivity by means of avalanche multiplication in amorphous selenium (a-Se) . A 15-μm-thick HARP photoconductive film that has a photoelectric-conversion efficiency for red light that is twice that of the conventional one has been developed. The HARP film, which mainly consists of a-Se with a band gap of about 2.0 eV, does not have sufficient photoelectric-conversion efficiency for red light. To solve this problem, the film is doped with Te with a band gap of about 0.3 eV. Doping a-Se with a larger amount of Te increases the efficiency. However, it can also deteriorate characteristics such as dark current, defect occurrence, and lag, because it creates many trap levels for electrons in the Te-doped a-Se layer. Trapped electrons increase the internal electric field around the incidentlight-side interface. We investigated Te-doping conditions that would not cause these problems.
关键词：HARP;高感度;光電変換膜;光電変換効率;セレン;テルル