Multicolor luminescence and afterglow from Cs2NaScCl6:Sb3+,Mn2+ crystals

被引：0

作者：

Wang, Xiaojia ^{[1
]}

Zheng, Wei ^{[2
]}

Zhang, Xiangzhou ^{[1
]}

Chen, Xiangxiang ^{[1
]}

Zhang, Yuhai ^{[1
]}

机构：

[1] Univ Jinan, Inst Adv Interdisciplinary Res iAIR, Sch Chem & Chem Engn, Jinan 250022, Shandong, Peoples R China

[2] Shandong Univ, Sch Mat Sci & Engn, Jinan 250061, Shandong, Peoples R China

来源：

INORGANIC CHEMISTRY FRONTIERS | 2024年 / 11卷 / 22期

关键词：

Atomic emission spectroscopy - Excitons - Gallium compounds - Laser beams - Layered semiconductors - Nanocrystals - Perovskite - Quantum yield - Semiconductor doping;

D O I：

10.1039/d4qi02019g

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

In contrast to single-band emitting phosphors, dual-band emitting phosphors provide a versatile tool for ratio-metric color tuning, enabling a wide color gamut and ensuing applications in information encryption and the anti-counterfeiting area. Here, a double perovskite, Cs2NaScCl6:xMn(2+) single crystals, was grown by a hydrothermal method. Pristine Cs2NaScCl6 crystals exhibited a pure blue emission band originating from the self-trapped excitons. Upon doping with Mn2+, the crystals exhibited a dual-band emission profile, consisting of both STE and Mn2+ emissions. To this end, the ratio of two bands was manipulated with Mn2+-doping concentration, rendering a wide color gamut from blue to red. Interestingly, co-doping with Sb3+ ions significantly enhanced the overall photoluminescence, boosting the quantum yield from 8.8% to up to 62.4%. Such an enhancement is attributed to an efficient energy transfer process from the STE to Mn2+ based on an investigation of photoluminescence lifetime. Importantly, these crystals exhibited an intriguing afterglow after X-ray excitation, with a duration exceeding 3000 s. This remarkable phenomenon opens up many new possibilities for their application in the advanced anti-counterfeiting area.

引用

页码：8123 / 8129

页数：7