Photoluminescence of Singlet/Triplet Self‐Trapped Excitons in Sb<sup>3+</sup>‐Based Metal Halides
Yuyu Jing, Ying Liu, Mingze Li, Zhiguo Xia
Abstract
Abstract Emerging lead‐free metal halides with low toxicity and unparalleled optoelectronic properties have attracted growing research interests, also demonstrating extensive application potentials. Among these, Sb 3+ ‐based all‐inorganic/organic–inorganic hybrid metal halides become a vital group due to the special energy level distribution along with diverse optical properties. However, there remains a gap in understanding the relationship between the crystal structure and the radiation process of involved Sb 3+ emission. Herein, the existing reports about Sb 3+ ‐based luminescent metal halides are revisited and their structure–luminescence–application relationship is explored, and it is further established that the triplet self‐trapped excitons (STEs) emission of Sb 3+ varies in different crystallographic environments and endows tunable luminescent performance. This work aims to provide constructive strategies in the further exploitation of Sb 3+ ‐based metal halides, and also guides the structural design and photoluminescence tuning of doped metal halide materials.