Issue 21, 2024

Chemically driven dimensionality modulation of hybrid tin(ii) halide perovskite microcrystals

Abstract

The lattice arrangement of lead-free perovskites can be altered by synthesis parameters such as concentration, temperature, choice of solvents, and the length of monovalent cations. This effect, often described as dimensionality modulation, can be exploited to develop new materials with better optical properties than their three-dimensional counterpart. This work explores the versatility of the hot-injection synthesis for obtaining 2-thiopheneethylammonium (TEA+) based tin halide perovskite microcrystals. The dimensionality of TEA-based tin bromide perovskite microcrystals can be modulated through changes in the TEA concentration, giving rise to the formation of highly luminescent 0D-TEA4SnBr6 and low-emissive 2D-TEA2SnBr4 microplates. In contrast, 0D-[TEASnCl3][TEACl] and 2D-TEA2SnI4 are thermodynamically preferred as main products when using the chloride and iodide analogues, respectively, limiting the dimensional versatility. It is noteworthy that 0D-TEA4SnBr6 shows the highest PLQY from the low dimensional TEA tin halide family (PLQY = 75% in thin-film) owing to a more confined configuration based on isolated [SnBr6]4− octahedra moieties separated by TEA+ cations, being attractive for optoelectronic applications.

Graphical abstract: Chemically driven dimensionality modulation of hybrid tin(ii) halide perovskite microcrystals

Supplementary files

Article information

Article type
Paper
Submitted
16 Feb 2024
Accepted
02 May 2024
First published
06 May 2024
This article is Open Access
Creative Commons BY license

J. Mater. Chem. C, 2024,12, 7605-7614

Chemically driven dimensionality modulation of hybrid tin(II) halide perovskite microcrystals

R. I. Sánchez-Alarcón, O. E. Solís, M. C. Momblona-Rincon, T. S. Ripolles, J. P. Martínez-Pastor, R. Abargues and P. P. Boix, J. Mater. Chem. C, 2024, 12, 7605 DOI: 10.1039/D4TC00623B

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