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Title: Enhanced photoredox activity of CsPbBr 3 nanocrystals by quantitative colloidal ligand exchange

Abstract

Quantitative colloidal ligand exchange on lead-halide perovskite nanocrystals (NCs) has remained a challenge due to the dynamic passivation of amines and carboxylic acids and the instability of core lead-halide perovskite systems. Here in this paper, we present a facile colloidal ligand exchange process using cinnamate acid ligands to quantitatively displace native oleate ligands on CsPbBr 3 NCs. The short cinnamate ligands lead to a 23-fold enhancement of the electron-donating ability of the CsPbBr 3 NCs when benzoquinone is used as an electron acceptor. A significantly increased photoredox activity is also observed in a complete photocatalytic reaction: the α-alkylation of aldehydes. Our results provide a new strategy to tune the photoredox activity of halide perovskite NCs as well as the exploration of NC-ligand interactions.

Authors:
ORCiD logo [1];  [2];  [2];  [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States). Chemistry and Nanoscience Center
  2. San Diego State Univ., San Diego, CA (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1579639
Alternate Identifier(s):
OSTI ID: 1575950
Report Number(s):
NREL/JA-5900-74931
Journal ID: ISSN 0021-9606
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 151; Journal Issue: 20; Journal ID: ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Pb-halide perovskite nanocrystals; photocatalysis; tuning optoelectronic properties; perovskites; photoluminescence spectroscopy; ligand exchange; nanocrystals; photoinduced electron transfer

Citation Formats

Lu, Haipeng, Zhu, Xiaolin, Miller, Collin, San Martin, Jovan, Chen, Xihan, Miller, Elisa M., Yan, Yong, and Beard, Matthew C. Enhanced photoredox activity of CsPbBr3 nanocrystals by quantitative colloidal ligand exchange. United States: N. p., 2019. Web. doi:10.1063/1.5129261.
Lu, Haipeng, Zhu, Xiaolin, Miller, Collin, San Martin, Jovan, Chen, Xihan, Miller, Elisa M., Yan, Yong, & Beard, Matthew C. Enhanced photoredox activity of CsPbBr3 nanocrystals by quantitative colloidal ligand exchange. United States. doi:10.1063/1.5129261.
Lu, Haipeng, Zhu, Xiaolin, Miller, Collin, San Martin, Jovan, Chen, Xihan, Miller, Elisa M., Yan, Yong, and Beard, Matthew C. Thu . "Enhanced photoredox activity of CsPbBr3 nanocrystals by quantitative colloidal ligand exchange". United States. doi:10.1063/1.5129261.
@article{osti_1579639,
title = {Enhanced photoredox activity of CsPbBr3 nanocrystals by quantitative colloidal ligand exchange},
author = {Lu, Haipeng and Zhu, Xiaolin and Miller, Collin and San Martin, Jovan and Chen, Xihan and Miller, Elisa M. and Yan, Yong and Beard, Matthew C.},
abstractNote = {Quantitative colloidal ligand exchange on lead-halide perovskite nanocrystals (NCs) has remained a challenge due to the dynamic passivation of amines and carboxylic acids and the instability of core lead-halide perovskite systems. Here in this paper, we present a facile colloidal ligand exchange process using cinnamate acid ligands to quantitatively displace native oleate ligands on CsPbBr3 NCs. The short cinnamate ligands lead to a 23-fold enhancement of the electron-donating ability of the CsPbBr3 NCs when benzoquinone is used as an electron acceptor. A significantly increased photoredox activity is also observed in a complete photocatalytic reaction: the α-alkylation of aldehydes. Our results provide a new strategy to tune the photoredox activity of halide perovskite NCs as well as the exploration of NC-ligand interactions.},
doi = {10.1063/1.5129261},
journal = {Journal of Chemical Physics},
number = 20,
volume = 151,
place = {United States},
year = {2019},
month = {11}
}

Journal Article:
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