| 查看: 1209 | 回复: 15 | ||
| 【奖励】 本帖被评价11次，作者sipei增加金币 9 个 | ||
| 当前主题已经存档。 | ||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | ||
[资源]
JAP上 ZnO 的表面态与发光的光谱性质的关系的最新综述
|
||
|
Surface-state related luminescence in ZnO nanocrystals Johannes Fallert,a Robert Hauschild, Felix Stelzl, Alex Urban, Markus Wissinger, Huijuan Zhou, Claus Klingshirn, and Heinz Kalt Institut für Angewandte Physik, Universität Karlsruhe (TH), Wolfgang-Gaede-Strasse 1, 76131 Karlsruhe, Germany Received 7 December 2006; accepted 14 February 2007; published online 4 April 2007 We investigate the optical properties of four different samples of ZnO nanocrystals, with a particle size average varying from 70 up to 380 nm. The photoluminescence PL of all samples shows at low temperature an emission band around 3.31 eV, which is several orders of magnitude stronger compared to the PL of bulk ZnO at this energy. This band shows a clear dependence on the surface to volume ratio of the nanocrystals and is therefore assigned to surface states. Temperature dependent measurements reveal that this band plays a major role up to room temperature for all examined ZnO powders. Additionally, intensity dependent measurements display that the origin of this emission band can be assigned to bound exciton complexes BECs. Compared to the well known shallow BECs the measured lifetimes of these relatively strong bound excitons states are much longer. © 2007 American Institute of Physics. DOI: 10.1063/1.2718290 大家赶紧下吧！ [ Last edited by popsheng on 2007-7-11 at 09:23 ] |
回复此楼» 猜你喜欢
湖北师范大学复试调剂
已经有0人回复
-
武汉纺织大学_化工学院官方调剂群-院士团队招生-学生自由度高-每届发展好
已经有0人回复
-
无机化学论文润色/翻译怎么收费?
已经有182人回复
-
济南大学国家优青课题组 2026 调剂招生来啦
已经有0人回复
-
武汉纺织大学_化学院官方调剂群-院士团队招生-学生自由度高发展好-欢迎各位同学
已经有0人回复
-
西华大学 化学 调剂有名额
已经有0人回复
-
上海应用技术大学招生调剂研究生
已经有7人回复
9楼2007-07-20 18:08:10
2楼2007-07-08 11:12:27
5楼2007-07-09 20:16:09
6楼2007-07-09 21:31:37
