荧光粉
热稳定性
拉曼光谱
发光二极管
发光
热释光
结构精修
发射光谱
量子效率
材料科学
分析化学(期刊)
光致发光
物理
结晶学
光电子学
化学
谱线
光学
晶体结构
天文
有机化学
色谱法
作者
Xiaoyu Ji,Jilin Zhang,Ying Li,Shuzhen Liao,Xinguo Zhang,Zhiyu Yang,Zhengliang Wang,Zhongxian Qiu,Wenli Zhou,Liping Yu,Shixun Lian
标识
DOI:10.1021/acs.chemmater.8b01652
摘要
Ba1.8–xSrxSiO4:0.1Ce3+,0.1Na+ (x = 0–1.8) phosphors were prepared by a high-temperature solid-state reaction. The emission peaks of Ba1.8–xSrxSiO4:0.1Ce3+,0.1Na+ shift from 391 to 411 nm with increasing Sr2+ content under excitation by a UV light at around 360 nm. Ba0.4Sr1.4SiO4:0.1Ce3+,0.1Na+ phosphor exhibits the best performance of luminescence, whose absolute quantum efficiency is 97.2%, and the emission intensity at 150 °C remains 90% of that at room temperature. The effect of replacing Ba2+ by Sr2+ on the red shift of the emission band and the increase of quantum efficiency (QE) and thermal stability (TS) was investigated in detail based on the Rietveld refinements, Raman spectra, thermoluminescence, and decay curves, etc. The performance of UV chip-based pc-LEDs indicates that Ba0.4Sr1.4SiO4:0.1Ce3+,0.1Na+ can be a promising blue phosphor for white-emitting pc-LEDs.
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