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


Chen K. Qi K. Zhou T. Yang T. Zhang Y. Guo Z. Lim C.-K. Zhang J. Žutic I. Zhang H. Prasad P.N.
December 2021Springer Science and Business Media B.V.

Nano-Micro Letters
2021#13Issue 1

Thanks to the excellent optoelectronic properties, lead halide perovskites (LHPs) have been widely employed in high-performance optoelectronic devices such as solar cells and light-emitting 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 environment 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 reaction. Noticeably, they show significant electrocatalytic activity (faradaic yield: 32% for CH4, 40% for CO) and operation stability (> 350 h).[Figure not available: see fulltext.]

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

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Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
Institute for Lasers, Photonics, and Biophotonics, Department of Chemistry, University at Buffalo, State University of New York, Buffalo, 14260, NY, United States
Department of Physics, University at Buffalo, State University of New York, Buffalo, 14260, NY, United States
Department of Chemical and Materials Engineering, School of Engineering, Nazarbayev University, Nur-Sultan City, 010000, Kazakhstan
Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou, 215009, Jiangsu, China

Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province
Institute for Lasers
Department of Physics
Department of Chemical and Materials Engineering
Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application

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