TAILIEUCHUNG - báo cáo hóa học:" Temperature Dependence of Photoelectrical Properties of Single Selenium Nanowires"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Temperature Dependence of Photoelectrical Properties of Single Selenium Nanowires | Nanoscale Res Lett 2010 5 926-929 DOI s11671-010-9585-2 NANO EXPRESS Temperature Dependence of Photoelectrical Properties of Single Selenium Nanowires Zhi-Min Liao Chong Hou Li-Ping Liu Da-Peng Yu Received 22 February 2010 Accepted 16 March 2010 Published online 28 March 2010 The Author s 2010. This article is published with open access at Abstract Influence of temperature on photoconductivity of single Se nanowires has been studied. Time response of photocurrent at both room temperature and low temperature suggests that the trap states play an important role in the photoelectrical process. Further investigations about light intensity dependence on photocurrent at different temperatures reveal that the trap states significantly affect the carrier generation and recombination. This work may be valuable for improving the device optoelectronic performances by understanding the photoelectrical properties. Keywords Se nanowires Trap states Photoconductivity Temperature effects Semiconductor nanowires have great potential applications as the building blocks for nanoscale electronic and optoelectronic devices. Selenium Se is an important semiconductor and Se nanowires have attracted enormous attentions due to their unique physical properties such as high photoconductivity large piezoelectric and thermoelectric effects 1-14 . In particular photodetectors and photoelectrical switchers based on individual Se nanowires have been fabricated 10-14 . In order to further improve . Liao C. Hou . Yu State Key Laboratory for Mesoscopic Physics Department of Physics Peking University Beijing 100871 People s Republic of China e-mail liaozm@ . Yu e-mail yudp@ . Liu Department of Chemistry TsingHua University Beijing People s Republic of China the performance of the Se nanowires optoelectronic devices well understanding of the photoelectrical properties is desirable. Measurement of the temperature dependence of .

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