Issue 15, 2023

Tuning white light emission and band gap in the one-dimensional metal halide (C6H13N4)3Pb2Br7 by pressure engineering

Abstract

One-dimensional (1D) metal halides have become promising white-light-emitting materials because of their unique broadband emission. Understanding the relationship between the optical characteristics and crystal structures of 1D metal halides is crucial to advancing their applications in the optoelectronic field. Here, we reported the pressure-driven optical and structural responses of the 1D metal halide (HMTA)3Pb2Br7 (HMTA = hexamethylenetetramine, C6H13N4+, cations). The broadband emission enhancement was achieved by applying mild pressure (<0.6 GPa), accompanied by a prolongation of the carrier lifetime. Moreover, the band gap narrowed with pressure, which was attributed to the enhanced orbital coupling between the metal and halogen by lattice contraction. Our high-pressure studies not only reveal the regulation mechanism of the self-trapped exciton (STE) emission in 1D metal halides but also indicate that pressure treatment can serve as a powerful strategy to tune the emission of white-light materials.

Graphical abstract: Tuning white light emission and band gap in the one-dimensional metal halide (C6H13N4)3Pb2Br7 by pressure engineering

Supplementary files

Article information

Article type
Communication
Submitted
13 feb 2023
Accepted
12 mar 2023
First published
13 mar 2023

J. Mater. Chem. C, 2023,11, 5018-5023

Tuning white light emission and band gap in the one-dimensional metal halide (C6H13N4)3Pb2Br7 by pressure engineering

N. Li, Y. Fang, L. Zhang, K. Wang and B. Zou, J. Mater. Chem. C, 2023, 11, 5018 DOI: 10.1039/D3TC00523B

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