Pressure-Driven Abnormal Emission Blue-Shift of Lead-Free Halide Double Perovskite Cs2AgInCl6 Nanocrystals

• DOI: 10.1021/acs.inorgchem.2c00185
• Publication Date: 2022-04-15T12:51:10Z
• Authors: Ao Chen; Xiaoling Jing; Tianyuan Wang; Tingting Zhao; Yu Zhang; Donglei Zhou; Rui Sun; Xueting Zhang; Ran Liu; Bo Liu; Quanjun Li; Bingbing Liu
• Keywords: Blueshift; Stokes shift; Absorption edge

Lead-free halide double perovskites (DPs) have been proposed as stable and promising alternatives to lead perovskites. Understanding the structural-optical properties of DPs is important for their applications. In this study, Cs2AgInCl6 DP nanocrystals, with a direct band gap, were synthesized studied. Because strong electron-phonon coupling leading exciton self-trapping, broad emission large Stokes shift nanocrystals observed. We observed an abnormal blue-shifted accompanied by red-shifted absorption edge because reduced under compression in cubic phase nanocrystals. Our study clarified basic correlation may promote application related fields.