Highly Stable Orange‐Red Long‐Persistent Luminescent CsCdCl3:Mn2+ Perovskite Crystal. (25th October 2022)

• Record Type: Journal Article
• Authors: He, Shuangshuang; Qiang, Qinping; Lang, Tianchun; Cai, Mingsheng; Han, Tao; You, Houjiang; Peng, Lingling; Cao, Shixiu; Liu, Bitao; Jing, Xiaolong; Jia, Bi
• Is Part Of: Angewandte Chemie. Volume 134:Number 48(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-10-25
• Subjects: Hexagonal Perovskite -- High Stability -- Lead-Free -- Luminescent Materials -- Mn2+ Doping; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202208937
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Halide perovskite has been widely studied as a new generation of photoelectronic materials. However, their thermal and humidity‐induced emission quenching have greatly limited their utility and reliability. Here, we report a hexagonal Mn 2+ ‐doped CsCdCl3 perovskite crystal that possesses stable photoluminescence (PL) at both high temperature and humidity. The room temperature long‐persistent luminescence (LPL) of the single crystals lasts up to 1480 s and can be adjusted by changing the concentration of Mn 2+ ion doping. The characteristic emission of d‐d transition of Mn 2+ is realized, and the photoluminescence quantum yield (PLQY) is up to 91.4 %, it can maintain more than 90 % of the initial PL spectral integral area at 150 °C (423 K). High humid stability PL can be achieved more than 75 % of the initial PL intensity after 55 days of immersion in water. These excellent properties show the application prospect of the LPL material in lighting indication and anti‐counterfeiting. Abstract : Mn 2+ ‐doped CsCdCl3 perovskite luminescent crystals with tunable afterglow time, high efficiency and stability were synthesized by a hydrothermal method. CsCdCl3 : Mn 2+ shows the longest afterglow time of 1480 s and the highest PLQY of 91.4 %. CsCdCl3 : Mn 2+ maintained over 90 % of the PL intensity at 423 K, and the PL remains about 80 % after soaking in water for 55 days.