期刊
JOURNAL OF CHEMICAL PHYSICS
卷 151, 期 20, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5129261
关键词
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资金
- Center for Hybrid Organic Inorganic Semiconductors for Energy (CHOISE), an Energy Frontier Research Center - Office of Basic Energy Sciences, Office of Science within the U.S. Department of Energy
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences and Biosciences
- NSF [CHE-1851747]
- [DE-AC36-08G028308]
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, 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 a-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. Published under license by AIP Publishing.
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