Issue 19, 2021

Photophysics in Cs3Cu2I5 and CsCu2I3

Abstract

Cs3Cu2I5 and CsCu2I3 have been demonstrated to emit broad spectrum light with high photoluminescence quantum efficiency (PLQY) due to their low-dimensional electronic structure and soft lattice with a strong electron–phonon coupling. Owing to their advantages of non-toxicity, simple synthesis method, high air stability and thermal stability, they have become one of the most promising semiconductors for next-generation optoelectronic devices. There are two explanations for the mechanism of their broad-spectrum luminescence, that is, self-trapped exciton (STE) luminescence and excited-state structure reorganization. We sort out the halogen composition-related PL, temperature-dependent PL and theoretical calculations of Cs3Cu2I5 and CsCu2I3 in recent years to review the mechanism of this broad spectrum luminescence from the perspectives of electronic dimensions and lattice distortion. In addition, current application status and future prospects of Cs3Cu2I5 and CsCu2I3 in optoelectronic fields are also presented in this review.

Graphical abstract: Photophysics in Cs3Cu2I5 and CsCu2I3

Article information

Article type
Review Article
Submitted
07 апр 2021
Accepted
25 юли 2021
First published
04 авг 2021

Mater. Chem. Front., 2021,5, 7088-7107

Photophysics in Cs3Cu2I5 and CsCu2I3

Y. Hui, S. Chen, R. Lin, W. Zheng and F. Huang, Mater. Chem. Front., 2021, 5, 7088 DOI: 10.1039/D1QM00552A

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