荧光粉
光致发光
发光
猝灭(荧光)
量子产额
材料科学
兴奋剂
量子效率
磷光
光化学
分析化学(期刊)
光电子学
化学
光学
荧光
物理
有机化学
作者
Ming Zhao,Yeping Ge,Yurong Li,Xiaoyan Song,Zhiguo Xia,Xinping Zhang
标识
DOI:10.1038/s41377-024-01607-x
摘要
Abstract Highly efficient inorganic phosphors are desirable for lighting-emitting diode light sources, and increasing the doping concentration of activators is a common approach for enhancing the photoluminescence quantum yield (PLQY). However, the constraint of concentration quenching poses a great challenge for improving the PLQY. Herein, we propose a fundamental design principle by separating activators and prolonging their distance in Eu 2+ -activated Rb 3 Y(PO 4 ) 2 phosphors to inhibit concentration quenching, in which different quenching rates are controlled by the Eu distribution at various crystallographic sites. The blue-violet-emitting Rb 3 Y(PO 4 ) 2 : x Eu ( x = 0.1%–15%) phosphors, with the occupation of Rb1, Rb2 and Y sites by Eu 2+ , exhibit rapid luminescence quenching with optimum external PLQY of 10% due to multi-channel energy migration. Interestingly, as the Eu concentration increases above 20%, Eu 2+ prefer to occupy the Rb1 and Y sites with separated polyhedra and large interionic distances, resulting in green emission with suppressed concentration quenching, achieving an improved external PLQY of 41%. Our study provides a unique design perspective for elevating the efficiency of Eu 2+ -activated phosphors toward high-performance inorganic luminescent materials for full-spectrum lighting.
科研通智能强力驱动
Strongly Powered by AbleSci AI