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Efficient Optical Orientation and Slow Spin Relaxation in Lead-Free CsSnBr3 Perovskite Nanocrystals

文献类型：期刊论文

作者Liang, Wenfei3,4,5; Li, Yulu3,4; Xiang, Dongmei3,4; Han, Yaoyao1,3,4; Jiang, Qike2; Zhang, Wei5; Wu, Kaifeng3,4
刊名ACS ENERGY LETTERS
出版日期2021-05-14
卷号6期号:5页码:1670-1676
ISSN号2380-8195
DOI10.1021/acsenergylett.1c00413
通讯作者Zhang, Wei(zhangwei@cigit.ac.cn) ; Wu, Kaifeng(kwu@dicp.ac.cn)
英文摘要Spin properties of lead halide perovskites have recently received considerable research attention, because the strong spin-orbit coupling (SOC) enables facile optical orientation of spin-polarized states, a property particularly useful for information science and spintronics. The strong SOC, however, also limits the spin relaxation lifetime. Herein, we study optical orientation and spin relaxation in lead-free CsSnBr3 perovskite nanocrystals. The SOC of CsSnBr3 (similar to 0.43 eV) is 3.5-fold weaker than that of lead halide perovskites but is still strong enough to ensure efficient optical orientation. Meanwhile, the room-temperature spin lifetime is prolonged to 18 +/- 2 ps, longer than the reported lifetimes of various lead halide perovskites, and it is likely limited by electron-hole exchange rather than SOC. These results demonstrate the strong potential of nontoxic tin halide perovskites for spin-related applications.
资助项目National Natural Science Foundation of China[21975253] ; Ministry of Science and Technology of China[2018YFA0208703] ; Strategic Pilot Science and Technology Project of Chinese Academy of Sciences[XDB17010100] ; Chongqing Talents Program[CQYC201905041]
WOS研究方向Chemistry ; Electrochemistry ; Energy & Fuels ; Science & Technology - Other Topics ; Materials Science
语种英语
出版者AMER CHEMICAL SOC
WOS记录号WOS:000651810400002
源URL[http://119.78.100.138/handle/2HOD01W0/13679]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Zhang, Wei; Wu, Kaifeng
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Liaoning, Peoples R China
3.Chinese Acad Sci, State Key Lab Mol React Dynam, Dalian 116023, Liaoning, Peoples R China
4.Chinese Acad Sci, Dynam Res Ctr Energy & Environm Mat, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
5.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
推荐引用方式
GB/T 7714		 Liang, Wenfei,Li, Yulu,Xiang, Dongmei,et al. Efficient Optical Orientation and Slow Spin Relaxation in Lead-Free CsSnBr3 Perovskite Nanocrystals[J]. ACS ENERGY LETTERS,2021,6(5):1670-1676.
APA Liang, Wenfei.,Li, Yulu.,Xiang, Dongmei.,Han, Yaoyao.,Jiang, Qike.,...&Wu, Kaifeng.(2021).Efficient Optical Orientation and Slow Spin Relaxation in Lead-Free CsSnBr3 Perovskite Nanocrystals.ACS ENERGY LETTERS,6(5),1670-1676.
MLA Liang, Wenfei,et al."Efficient Optical Orientation and Slow Spin Relaxation in Lead-Free CsSnBr3 Perovskite Nanocrystals".ACS ENERGY LETTERS 6.5(2021):1670-1676.

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来源：重庆绿色智能技术研究院

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