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Triplet Sensitization by "Self-Trapped" Excitons of Nontoxic CuInS2 Nanocrystals for Efficient Photon Upconversion

文献类型：期刊论文

作者Han, Yaoyao1,2,3; He, Shan1,2; Luo, Xiao1,2; Li, Yulu1,2; Chen, Zongwei1,2; Kang, Wanchao4; Wang, Xiuli4; Wu, Kaifeng1,2
刊名JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
出版日期2019-08-21
卷号141期号:33页码:13033-13037
ISSN号0002-7863
DOI10.1021/jacs.9b07033
通讯作者Wu, Kaifeng(kwu@dicp.ac.cn)
英文摘要Triplet energy transfer (TET) from semiconductor nanocrystals (NCs) has recently emerged as a new triplet sensitization paradigm. It remains unclear how trap states pervasive in NCs influence TET or whether trapped excitons can undergo efficient TET. Here we partially address this issue by studying TET from CuInS2 NCs as a model system because their photogenerated excitons are known to be "self-trapped" due to hole localization to intragap Cu states. We found that, thanks to the long lifetime (209 +/- 17 ns) of self-trapped excitons, they could be extracted with an efficiency of similar to 92.3% by surface-anchored anthracene despite that the TET rate was relatively slow (57.1 +/- 1.7 mu s(-1)). We further leveraged this efficient sensitization to achieve triplet-triplet-annihilation photon upconversion (TTA-UC) with a quantum yield of 18.6 +/- 0.3%. Thus, this study not only demonstrates trapped excitons can undergo efficient TET as well, but also presents the first TTA-UC system sensitized by nontoxic NCs which is important for the real-life application of this technique.
WOS关键词ENERGY-TRANSFER ; SEMICONDUCTOR NANOCRYSTALS ; QUANTUM DOTS ; LUMINESCENT ; TRANSMITTER ; STATES
资助项目Strategic Pilot Science and Technology Projects of Chinese Academy of Sciences[XDA21010206] ; Strategic Pilot Science and Technology Projects of Chinese Academy of Sciences[XDB17010100] ; Ministry of Science and Technology of China[2018YFA0208703] ; LiaoNing Revitalization Talents Program[XLYC1807154]
WOS研究方向Chemistry
语种英语
出版者AMER CHEMICAL SOC
WOS记录号WOS:000482546400017
资助机构Strategic Pilot Science and Technology Projects of Chinese Academy of Sciences ; Strategic Pilot Science and Technology Projects of Chinese Academy of Sciences ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; LiaoNing Revitalization Talents Program ; LiaoNing Revitalization Talents Program ; Strategic Pilot Science and Technology Projects of Chinese Academy of Sciences ; Strategic Pilot Science and Technology Projects of Chinese Academy of Sciences ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; LiaoNing Revitalization Talents Program ; LiaoNing Revitalization Talents Program ; Strategic Pilot Science and Technology Projects of Chinese Academy of Sciences ; Strategic Pilot Science and Technology Projects of Chinese Academy of Sciences ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; LiaoNing Revitalization Talents Program ; LiaoNing Revitalization Talents Program ; Strategic Pilot Science and Technology Projects of Chinese Academy of Sciences ; Strategic Pilot Science and Technology Projects of Chinese Academy of Sciences ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; LiaoNing Revitalization Talents Program ; LiaoNing Revitalization Talents Program
源URL[http://cas-ir.dicp.ac.cn/handle/321008/173404]  
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
通讯作者Wu, Kaifeng
作者单位1.Chinese Acad Sci, State Key Lab Mol React Dynam, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
2.Chinese Acad Sci, Dynam Res Ctr Energy & Environm Mat, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Liaoning, Peoples R China
推荐引用方式
GB/T 7714		 Han, Yaoyao,He, Shan,Luo, Xiao,et al. Triplet Sensitization by "Self-Trapped" Excitons of Nontoxic CuInS2 Nanocrystals for Efficient Photon Upconversion[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2019,141(33):13033-13037.
APA Han, Yaoyao.,He, Shan.,Luo, Xiao.,Li, Yulu.,Chen, Zongwei.,...&Wu, Kaifeng.(2019).Triplet Sensitization by "Self-Trapped" Excitons of Nontoxic CuInS2 Nanocrystals for Efficient Photon Upconversion.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,141(33),13033-13037.
MLA Han, Yaoyao,et al."Triplet Sensitization by "Self-Trapped" Excitons of Nontoxic CuInS2 Nanocrystals for Efficient Photon Upconversion".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 141.33(2019):13033-13037.

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来源：大连化学物理研究所

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