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Water-Dispersible -CsPbBr3 Perovskite Nanocrystals with Ultra-Stability and its Application in Electrochemical -CO2 Reduction

Keqiang Chen Han Zhang Paras N.Prasad Kun Qi Tong Zhou Tingqiang Yang Yupeng Zhang Zhinan Guo Chang-Keun Lim Jiayong Zhang Igor-utic

纳微快报（英文）2021，Vol.13Issue(11)：190-202,13.

Water-Dispersible -CsPbBr3 Perovskite Nanocrystals with Ultra-Stability and its Application in Electrochemical -CO2 Reduction

Water?Dispersible -CsPbBr3 Perovskite Nanocrystals with Ultra?Stability and its Application in Electrochemical -CO2 Reduction

Keqiang Chen ¹Han Zhang ²Paras N.Prasad ¹Kun Qi ²Tong Zhou ¹Tingqiang Yang ³Yupeng Zhang ¹Zhinan Guo ¹Chang-Keun Lim ¹Jiayong Zhang ²Igor-utic⁴

作者信息

1. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province,Institute of Microscale Optoelectronics,Shenzhen University,Shenzhen 518060,People's Republic of China
2. Institute for Lasers,Photonics,and Biophotonics,Department of Chemistry,University at Buffalo,State University of New York,Buffalo,NY 14260,USA
3. Department of Physics,University at Buffalo,State University of New York,Buffalo,NY 14260,USA
4. Department of Chemical and Materials Engineering,School of Engineering,Nazarbayev University,Nur?Sultan City 010000,Kazakhstan
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摘要

Abstract

Thanks to the excellent optoelectronic properties, lead halide perovskites (LHPs) have been widely employed in highperformance optoelectronic devices such as solar cells and lightemitting diodes. However, overcoming their poor stability against water has been one of the biggest challenges for most applications. Herein, we report a novel hot-injection method in a Pb-poor envi?ronment combined with a well-designed purification process to synthesize water-dispersible -CsPbBr3 nanocrystals (NCs). The as-prepared NCs sustain their superior photoluminescence (91％ quantum yield in water) for more than 200 days in an aqueous environment, which is attributed to a passivation effect induced by excess CsBr salts. Thanks to the ultra-stability of these LHP NCs, for the first time, we report a new application of LHP NCs, in which they are applied to electrocatalysis of -CO2 reduction reac?tion. Noticeably, they show significant electrocatalytic activity (faradaic yield: 32％ for -CH4, 40％ for CO) and operation stability (> 350 h).

关键词

CsPbBr3 nanocrystals/Water-dispersible/Ultra-stability/Electrochemical -CO2 reduction

Key words

CsPbBr3 nanocrystals/Water-dispersible/Ultra-stability/Electrochemical -CO2 reduction

引用本文复制引用

Keqiang Chen,Han Zhang,Paras N.Prasad,Kun Qi,Tong Zhou,Tingqiang Yang,Yupeng Zhang,Zhinan Guo,Chang-Keun Lim,Jiayong Zhang,Igor-utic..Water-Dispersible -CsPbBr3 Perovskite Nanocrystals with Ultra-Stability and its Application in Electrochemical -CO2 Reduction[J].纳微快报（英文）,2021,13(11):190-202,13.

基金项目

This research was supported by the National Natural Science Foundation of China(Nos.11674258,51602305,51702219,61975134,11904250),Guangdong Basic and Applied Basic Research Foundation(2020B1515020051),the Science and Technology Innovation Commission of Shenzhen(JCYJ20180305125345378),and Shenzhen Nanshan District Pilot?age Team Program(LHTD20170006).Partial support from The Institute For Lasers,Photonics and Biophotonics at The University at Buffalo is also acknowledged.T.Z.and I.Z.were supported by the U.S.DOE,Office of Science BES,Award No.DE-SC0004890. （Nos.11674258,51602305,51702219,61975134,11904250）

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