Ultralong afterglow and unity quantum yield from a transparent CsCdCl3:Mn crystal

• Published in: Aggregate (Hoboken) Vol. 4; no. 4
• Main Authors: Liu, Yeqi, Zhang, Xiangzhou, Wang, Xiaojia, Yan, Shao, Liang, Yanjie, Zhang, Yuhai
• Format: Journal Article
• Language: English
• Published: Guangzhou John Wiley & Sons, Inc 01.08.2023; Wiley
• Subjects: CsCdCl3 crystal; Energy; Information storage; Plasma sintering; resonant energy transfer; Single crystals; Spectrum analysis; thermally enhanced luminescence; transparent afterglow matrix; ultralong afterglow
• ISSN: 2692-4560; 2766-8541; 2692-4560
• DOI: 10.1002/agt2.334

Transparent afterglow crystals are keenly desired for three‐dimensional information storage. Herein, CsCdCl3 perovskite crystals were grown by a programmable cooling procedure in a hydrothermal reactor. The pristine crystal showed an abnormal optical behavior where the absorption increased by 2.3 folds at high temperature, leading to a fourfold boost of photoluminescence (PL) intensity. After Mn2+ doping, the PL quantum yield was improved to nearly unity. Importantly, the doped crystals exhibited an ultralong afterglow up to 12 h after ceasing UV excitation and a high transmittance up to 75% in the visible region. This work brought a new member to the library of transparent afterglow crystal, opening up many possibilities to advanced applications such as volumetric display and three‐dimensional information encryption. The solution‐grown CsCdCl3 perovskite crystals exhibit a high transmittance up to 75% in the visible region. After Mn2+ doping, the photoluminescent quantum yield of crystal is improved to nearly unity. Simultaneously, a long afterglow up to 12 hours is activated.