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

doi:10.1021/jacs.9b07033

	Triplet Sensitization by "Self-Trapped" Excitons of Nontoxic CuInS2 Nanocrystals for Efficient Photon Upconversion
	Han, Yaoyao 1,2,3; He, Shan 1,2; Luo, Xiao 1,2; Li, Yulu 1,2; Chen, Zongwei 1,2; Kang, Wanchao 4; Wang, Xiuli 4; Wu, Kaifeng 1,2
刊名	JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
	2019-08-21
卷号	141 期号:33 页码:13033-13037
ISSN号	0002-7863
DOI	10.1021/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.
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关键词	ENERGY-TRANSFER ; SEMICONDUCTOR NANOCRYSTALS ; QUANTUM DOTS ; LUMINESCENT ; TRANSMITTER ; STATES
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
内容类型	期刊论文
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.