Enhanced photoredox activity of CsPbBr3 nanocrystals by quantitative colloidal ligand exchange

被引：57

作者：

Lu, Haipeng ^{[1
]}

Zhu, Xiaolin ^{[2
]}

Miller, Collin ^{[2
]}

San Martin, Jovan ^{[2
]}

Chen, Xihan ^{[1
]}

Miller, Elisa M. ^{[1
]}

Yan, Yong ^{[2
]}

Beard, Matthew C. ^{[1
]}

机构：

[1] Natl Renewable Energy Lab, Chem & Nanosci Ctr, Golden, CO 80401 USA

[2] San Diego State Univ, Dept Chem & Biochem, San Diego, CA 92182 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 2019年 / 151卷 / 20期

关键词：

HALIDE PEROVSKITES CSPBX3; QUANTUM-DOT; HOLE TRANSFER; ELECTRON; BR; CL;

D O I：

10.1063/1.5129261

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页数：5

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