Issue 1, 2022

Water-assisted synthesis of lead-free Cu based fluorescent halide perovskite nanostructures

Abstract

Lead halide perovskite nanocrystals (NCs) are eminent for their emission properties, but lead (Pb) toxicity and moisture instability have become an impediment to their commercial use. To resolve these obstacles and develop an environmentally friendly energy material at a low cost, we discuss the synthesis of lead-free Cs2CuCl4, Cs2CuBr4, and Cs2CuBr2Cl2 perovskite nanostructures with non-toxic copper (Cu). In this work, we adopted a ligand assisted re-precipitation (LARP) synthesis route for material preparation at room temperature. Water is used as a polar solvent to dissolve the metal halide precursors rapidly. For the first time, we achieved a high PLQY of 38% in mixed halide perovskite Cs2CuBr2Cl2NCs with blue luminescence in an aqueous medium. Cu-based perovskites Cs2CuCl4, Cs2CuBr4, and Cs2CuBr2Cl2 demonstrated their morphology as square nanoplates, nanorods, and rectangular nanoplates, respectively. The long-term photoluminescence stability of these stored perovskites was also examined at different intervals for 45 days.

Graphical abstract: Water-assisted synthesis of lead-free Cu based fluorescent halide perovskite nanostructures

Supplementary files

Article information

Article type
Paper
Submitted
14 sep 2021
Accepted
01 nov 2021
First published
09 nov 2021
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2022,3, 658-664

Water-assisted synthesis of lead-free Cu based fluorescent halide perovskite nanostructures

H. Shankar, A. Jha and P. Kar, Mater. Adv., 2022, 3, 658 DOI: 10.1039/D1MA00849H

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