標題: | Photoconductive Enhancement of Single-Layer Tin Oxide-Coated ZnO Nanowires |
作者: | Lin, Chin-Ching Chen, Yu-Wei Chiang, Mei-Ching Lee, Chia-Hua Tung, Yung-Liang Chen, San-Yuan 材料科學與工程學系 Department of Materials Science and Engineering |
關鍵字: | II-VI semiconductors;nanowires;photoconductivity;photoexcitation;pyrolysis;semiconductor quantum wires;tin compounds;transmission electron microscopy;ultraviolet radiation effects;wide band gap semiconductors;zinc compounds |
公開日期: | 2010 |
摘要: | In this study, zinc oxide nanowires (ZnO NWs) coated with crystalline tin oxide (SnO(2)) by an ultrasonic spray pyrolysis were investigated. High resolution transmission electron microscopy analysis confirms that a continuous single SnO(2) layer of about 10 nm has been coated on the ZnO NWs. Photoconductivity measurements revealed that the ZnO NWs coated with the single uniform SnO(2) layer had a higher photoconductivity ratio by about a factor of 8 compared to the pristine ZnO NWs, attributed to the multi-photoexcited electrons. Under a steady radiation of UV light (lambda=325 nm), a substantial increase in the steady-state photocurrent is noticeable, suggesting that extra photoinduced charges are transferred from SnO(2) to ZnO NWs. |
URI: | http://hdl.handle.net/11536/6176 http://dx.doi.org/10.1149/1.3271100 |
ISSN: | 0013-4651 |
DOI: | 10.1149/1.3271100 |
期刊: | JOURNAL OF THE ELECTROCHEMICAL SOCIETY |
Volume: | 157 |
Issue: | 2 |
起始頁: | H227 |
結束頁: | H230 |
顯示於類別: | 期刊論文 |