Enhanced photoredox activity of CsPbBr3 nanocrystals by quantitative colloidal ligand exchange

Lu, Haipeng; Zhu, Xiaolin; Miller, Collin; San Martin, Jovan; Chen, Xihan; Miller, Elisa M.; Yan, Yong; Beard, Matthew C.

doi:10.1063/1.5129261

Enhanced photoredox activity of CsPbBr₃ nanocrystals by quantitative colloidal ligand exchange

Journal Article · Wed Nov 27 23:00:00 EST 2019 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.5129261· OSTI ID:1579639

^[1]; Zhu, Xiaolin ^[2]; Miller, Collin ^[2]; San Martin, Jovan ^[2]; ^[1]; ^[1]; ^[2]; ^[1]

National Renewable Energy Lab. (NREL), Golden, CO (United States). Chemistry and Nanoscience Center
San Diego State Univ., San Diego, CA (United States)

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.

View Accepted Manuscript (DOE)

Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Center for Hybrid Organic-Inorganic Semiconductors for Energy (CHOISE); National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1579639

Alternate ID(s):: OSTI ID: 1575950

Report Number(s):: NREL/JA--5900-74931

Journal Information:: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 20 Vol. 151; ISSN 0021-9606

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Enhanced photoredox activity of CsPbBr3 nanocrystals by quantitative colloidal ligand exchange

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Enhanced photoredox activity of CsPbBr₃ nanocrystals by quantitative colloidal ligand exchange