铽
光致发光
材料科学
兴奋剂
掺杂剂
光学
镧系元素
发光二极管
离子
量子效率
钙钛矿(结构)
激子
光电子学
二极管
发光
化学
物理
有机化学
量子力学
结晶学
作者
Hao Liang,Gang Yang,Songchao Bai,Chao Li,Xueguo Li,Yinhua Wang,Jinshu Huang,Jun Ji,Yongsheng Zhu
出处
期刊:Optics Letters
[The Optical Society]
日期:2022-09-06
卷期号:47 (19): 5176-5176
被引量:18
摘要
Lead-free double perovskite materials with efficient and stable self-trapped exciton (STE) emissions show enormous potential for next-generation solid-state lighting. However, the low-emission efficiency and difficulty of spectral regulation are two major obstacles to their application. Here, all-inorganic rare-earth-based double perovskite Cs2NaYCl6 single crystals with strong blue emissions were reported as effective hosts to accommodate lanthanide ion doping. By controlling the introduction of Tb3 + ions and efficient energy transfer from the STEs to the dopants, the emission color of Cs2NaYCl6 single crystals was flexibly modulated from blue to green. The quantum yields were also significantly improved from 10% to 78.81% by optimizing the Tb3 + ion concentration. Further, stable light-emitting diode prototypes based on Cs2NaYCl6 color conversion materials were fabricated to demonstrate the practical applications of rare-earth-based double perovskite.
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