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Polymer ligands induced remarkable spectral shifts in all-inorganic lead halide perovskite nanocrystals

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Abstract

Perovskite nanocrystals (NCs) have aroused wide interest in the field of optoelectronics. Herein, a quantitative post-processing method is proposed to precisely alter the photoluminescence of lead halide perovskite NCs by ligand substitution using a multidentate multifunctional polymer ligand with amide, carboxylic acid and terminal double bond groups. Surprisingly, the synergistic effect of the ligand leads to a continuously blue-shifted emission over a wide visible region (∼100 nm) with increasing addition of the polymer ligand. Moreover, the full width at half maximum (fwhm) also gradually narrows, indicating the formation of a uniform particle size after the ligand surface interaction. Simultaneously, the terminal double bonds can be cross-linked with styrene to protect perovskite NCs from moisture. These results provide a new route for controllable photoluminescence regulation and preliminarily explore the correlation between the luminescence properties of perovskite NCs and polymer ligands.

Graphical abstract: Polymer ligands induced remarkable spectral shifts in all-inorganic lead halide perovskite nanocrystals

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Article information


Submitted
13 Apr 2020
Accepted
22 Jun 2020
First published
23 Jun 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Polymer ligands induced remarkable spectral shifts in all-inorganic lead halide perovskite nanocrystals

H. Xiao, Y. Wei, P. Dang, S. Liang, Z. Cheng, G. Li and J. Lin, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/D0TC01822H

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