Results
Title

Air‐Stable, Lead‐Free Zero‐Dimensional Mixed Bismuth‐Antimony Perovskite Single Crystals with Ultra‐broadband Emission.

Authors

Zhang, Ruiling; Mao, Xin; Yang, Yang; Yang, Songqiu; Zhao, Wenyuan; Wumaier, Tuerdi; Wei, Donghui; Deng, Weiqiao; Han, Keli

Abstract

Lead‐free zero‐dimensional (0D) organic‐inorganic metal halide perovskites have recently attracted increasing attention for their excellent photoluminescence properties and chemical stability. Here, we report the synthesis and characterization of an air‐stable 0D mixed metal halide perovskite (C8NH12)4Bi0.57Sb0.43Br7⋅H2O, in which individual [BiBr6]3− and [SbBr6]3− octahedral units are completely isolated and surrounded by the large organic cation C8H12N . Upon photoexcitation, the bulk crystals exhibit ultra‐broadband emission ranging from 400 to 850 nm, which originates from both free excitons and self‐trapped excitons. This is the first example of 0D perovskites with broadband emission spanning the entire visible spectrum. In addition, (C8NH12)4Bi0.57Sb0.43Br7⋅H2O exhibits excellent humidity and light stability. These findings present a new direction towards the design of environmentally‐friendly, high‐performance 0D perovskite light emitters.

Subjects

PEROVSKITE; X-ray diffraction; CRYSTAL structure; METAL halides; DENSITY functional theory

Publication

Angewandte Chemie, 2019, Vol 131, Issue 9, p2751

ISSN

0044-8249

Publication type

Academic Journal

DOI

10.1002/ange.201812865