Trap states and carrier dynamics of TiO2 studied by photoluminescence spectroscopy under weak excitation condition
文献类型：期刊论文
| 作者 | Wang, Xiuli1,2; Feng, Zhaochi1; Shi, Jianying1; Jia, Guoqing1,2; Shen, Shuai1,2; Zhou, Jun1,2; Li, Can1 |
| 刊名 | physical chemistry chemical physics
 |
| 出版日期 | 2010 |
| 卷号 | 12期号:26页码:7083-7090 |
| 英文摘要 | anatase and rutile tio2 were investigated with photoluminescence techniques under the weak excitation condition, where trap states play a vital role in carrier dynamics. the visible emission of anatase and near-infrared (nir) emission of rutile both exhibit extremely long lifetimes up to milliseconds. the decay processes can be well described by the power-law decay which corresponds to the trapping-detrapping effect. these results indicate that the luminescence processes in both anatase and rutile tio2 have a close relationship with trap states. the visible emission band was assigned to the donor-acceptor recombination. oxygen vacancies and hydroxyl groups mainly serve as the donor and acceptor sites, respectively. the nir luminescence is originated from the recombination of trapped electrons with free holes, while the trapped electrons were formed through two paths, direct trapping or trap-to-trap hopping. the trap states in anatase and rutile tio2 may largely influence the photocatalysis process of tio2 and determine the photocatalytic activity under stationary illumination. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | chemistry, physical ; physics, atomic, molecular & chemical |
| 研究领域[WOS] | chemistry ; physics |
| 关键词[WOS] | transient absorption-spectroscopy ; temperature-dependent photoluminescence ; diffuse-reflectance spectroscopy ; electron-hole recombination ; time-resolved luminescence ; anatase tio2 ; semiconductor clusters ; charge separation ; ir spectroscopy ; irradiated tio2 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000279098300023 |
| 公开日期 | 2015-11-17 |
| 源URL | [http://159.226.238.44/handle/321008/142230]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Xiuli,Feng, Zhaochi,Shi, Jianying,et al. Trap states and carrier dynamics of TiO2 studied by photoluminescence spectroscopy under weak excitation condition[J]. physical chemistry chemical physics,2010,12(26):7083-7090. |
| APA | Wang, Xiuli.,Feng, Zhaochi.,Shi, Jianying.,Jia, Guoqing.,Shen, Shuai.,...&Li, Can.(2010).Trap states and carrier dynamics of TiO2 studied by photoluminescence spectroscopy under weak excitation condition.physical chemistry chemical physics,12(26),7083-7090. |
| MLA | Wang, Xiuli,et al."Trap states and carrier dynamics of TiO2 studied by photoluminescence spectroscopy under weak excitation condition".physical chemistry chemical physics 12.26(2010):7083-7090. |
入库方式： OAI收割
来源：大连化学物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。