Broadband red emission from one-dimensional hexamethonium lead bromide perovskitoid

Biqi He; Kuan Kuang; Bing Xu; Junjie Tang; Sheng Cao; Zixian Yu; Mingkai Li; Yunbin He; Junnian Chen

doi:10.1039/d3cc03477a

Broadband red emission from one-dimensional hexamethonium lead bromide perovskitoid

Chem Commun (Camb). 2023 Oct 4;59(79):11795-11798. doi: 10.1039/d3cc03477a.

Authors

Biqi He¹, Kuan Kuang¹, Bing Xu², Junjie Tang¹, Sheng Cao¹, Zixian Yu¹, Mingkai Li¹, Yunbin He¹, Junnian Chen¹

Affiliations

¹ Ministry-of-Education Key Laboratory of Green Preparation and Application for Functional Materials, and School of Materials Science & Engineering, Hubei University, Wuhan 430062, China.
² Lingnan Normal University, Zhanjiang, 524048, China.

PMID: 37706286
DOI: 10.1039/d3cc03477a

Abstract

Broadband emissions from low-dimensional hybrid perovskites have aroused intense interest. However, the achievement of broadband red emission in lead halide perovskites remains challenging. Herein, we report a one-dimensional (1D) hybrid lead bromide perovskitoid, (HM)Pb₂Br₆ (HM = hexamethonium), featuring a corrugated "3 × 3" [Pb₂Br₆]^2- chain. The unique structure results in intriguingly red emission peaking at 692 nm, with a PLQY of around 6.24%. Our spectroscopic and computational studies reveal that the red emission derives from self-localized Pb₂³⁺, Pb³⁺ and Br₂^- species confined within the inorganic lead bromide lattice that function as radiative centres. This finding will benefit the design of perovskite systems for efficient red emission.