Giant defect-induced effects on nanoscale charge separation in semiconductor photocatalysts
文献类型：期刊论文
| 作者 | Chen, Ruotian1,2; Pang, Shan1; An, Hongyu1; Dittrich, Thomas3; Fan, Fengtao1; Li, Can1 |
| 刊名 | Nano letters
 |
| 出版日期 | 2019 |
| 卷号 | 19期号:1页码:426-432 |
| 关键词 | Defect Photocatalysis Solar energy conversion Charge separation Surface photovoltage |
| ISSN号 | 1530-6984 |
| DOI | 10.1021/acs.nanolett.8b04245 |
| 通讯作者 | Dittrich, thomas(dittrich@helmholtz-berlin.de) ; Fan, fengtao(ftfan@dicp.ac.cn) ; Li, can(canli@dicp.ac.cn) |
| 英文摘要 | Defects can markedly impact the performance of semiconductor-based photocatalysts, where the spatial separation of photo generated charges is required for converting solar energy into fuels. however, understanding exactly how defects affect photogenerated charge separation at nanometer scale remains quite challenging. here, using time and space-resolved surface photovoltage approaches, we demonstrate that the distribution of surface photogenerated charges and the direction of photogenerated charge separation are determined by the defects distributed within a 100 nm surface region of a photocatalytic cu2o particle. this is enabled by the defect-induced charge separation process, arising from the trapping of electrons at the near-surface defect states and the accumulation of holes at the surface states. more importantly, the driving force for defect-induced charge separation is greater than 4.2 kv/cm and can be used to drive photocatalytic reactions. these findings highlight the importance of near-surface defect engineering in promoting photogenerated charge separation and manipulating surface photogenerated charges; further, they open up a powerful avenue for improving photocatalytic charge separation and solar energy conversion efficiency. |
| WOS关键词 | CARRIER DYNAMICS ; CUPROUS-OXIDE ; SURFACE ; EFFICIENCY ; NANOSTRUCTURES ; ENHANCEMENT ; STATES ; CUO ; XPS |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| WOS类目 | Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter |
| 语种 | 英语 |
| WOS记录号 | WOS:000455561300054 |
| 出版者 | AMER CHEMICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2372898 |
| 专题 | 大连化学物理研究所 |
| 通讯作者 | Dittrich, Thomas; Fan, Fengtao; Li, Can |
| 作者单位 | 1.Chinese Acad Sci, Collaborat Innovat Ctr Chem Energy Mat IChEM, Dalian Natl Lab Clean Energy, State Key Lab Catalysis,Dalian Inst Chem Phys, Zhongshan Rd 457, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Helmholtz Zentrum Berlin Mat & Energie GmbH, Inst Silizium Photovolta, Kekulestr 5, D-12489 Berlin, Germany |
| 推荐引用方式 GB/T 7714 | Chen, Ruotian,Pang, Shan,An, Hongyu,et al. Giant defect-induced effects on nanoscale charge separation in semiconductor photocatalysts[J]. Nano letters,2019,19(1):426-432. |
| APA | Chen, Ruotian,Pang, Shan,An, Hongyu,Dittrich, Thomas,Fan, Fengtao,&Li, Can.(2019).Giant defect-induced effects on nanoscale charge separation in semiconductor photocatalysts.Nano letters,19(1),426-432. |
| MLA | Chen, Ruotian,et al."Giant defect-induced effects on nanoscale charge separation in semiconductor photocatalysts".Nano letters 19.1(2019):426-432. |
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来源：大连化学物理研究所
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