气候变化领域集成服务门户(CCPortal): Self-trapped exciton engineering for white-light emission in colloidal lead-free double perovskite nanocrystals

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DOI	10.1016/j.scib.2020.03.010
	Self-trapped exciton engineering for white-light emission in colloidal lead-free double perovskite nanocrystals
	Cong M.; Yang B.; Hong F.; Zheng T.; Sang Y.; Guo J.; Yang S.; Han K.
发表日期	2020
ISSN	20959273
起始页码	1078
结束页码	1084
卷号	65 期号:13
英文摘要	Intrinsic broadband photoluminescence (PL) of self-trapped excitons (STEs) are systematically studied in lead-free double perovskite nanocrystals (NCs). It is clarified that bandgap (direct/indirect) has important influence on the PL properties of STEs: indirect bandgap NCs exhibit strong exciton-phonon coupling which results in non-radiative STEs, while direct bandgap NCs exhibit moderate exciton-phonon coupling, inducing bright STE PL. Furthermore, by alloying K+ and Li+ ions in Cs2AgInCl6 NCs, the NCs exhibit broadband white-light emission. Charge-carrier dynamics study indicates that the efficient white-light emission originates from the further suppressed non-radiative processes of the STEs in the direct bandgap structure. This work may deepen the understanding of STEs and guide the design of high-performance lead-free perovskites. © 2020 Science China Press
关键词	Carrier-phonon coupling Double perovskite Hot-carrier cooling Nanocrystal Trap state
英文关键词	Chlorine compounds; Energy gap; Nanocrystals; Perovskite; Phonons; Photoluminescence; Broad-band photoluminescence; Carrier cooling; Carrier-phonon coupling; Charge carrier dynamics; Double perovskites; Exciton-phonon couplings; Lead-free perovskites; Trap state; Excitons
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207015
作者单位	State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China; University of the Chinese Academy of Sciences, Beijing, 100039, China; Institute of Molecular Sciences and Engineering, Shandong University, Qingdao, 266237, China; Key Laboratory of Chemical Lasers, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
推荐引用方式 GB/T 7714	Cong M.,Yang B.,Hong F.,et al. Self-trapped exciton engineering for white-light emission in colloidal lead-free double perovskite nanocrystals[J],2020,65(13).
APA	Cong M..,Yang B..,Hong F..,Zheng T..,Sang Y..,...&Han K..(2020).Self-trapped exciton engineering for white-light emission in colloidal lead-free double perovskite nanocrystals.Science Bulletin,65(13).
MLA	Cong M.,et al."Self-trapped exciton engineering for white-light emission in colloidal lead-free double perovskite nanocrystals".Science Bulletin 65.13(2020).