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

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

doi:10.1007/s40820-021-00690-8

Nano-Micro Letters (Aug 2021)

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

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

Affiliations

Keqiang Chen: Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University
Kun Qi: Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University
Tong Zhou: Department of Physics, University at Buffalo, State University of New York
Tingqiang Yang: Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University
Yupeng Zhang: Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University
Zhinan Guo: Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University
Chang-Keun Lim: Institute for Lasers, Photonics, and Biophotonics, Department of Chemistry, University at Buffalo, State University of New York
Jiayong Zhang: 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
Igor Žutic: Department of Physics, University at Buffalo, State University of New York
Han Zhang: Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University
Paras N. Prasad: Institute for Lasers, Photonics, and Biophotonics, Department of Chemistry, University at Buffalo, State University of New York

DOI: https://doi.org/10.1007/s40820-021-00690-8
Journal volume & issue: Vol. 13, no. 1
pp. 1 – 13

Abstract

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Abstract 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).

Published in Nano-Micro Letters

ISSN: 2311-6706 (Print); 2150-5551 (Online)
Publisher: SpringerOpen
Country of publisher: Germany
LCC subjects: Technology
Website: http://www.springer.com/40820

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