荧光粉
材料科学
热稳定性
分析化学(期刊)
发光二极管
发光
显色指数
结构精修
兴奋剂
色温
发光效率
钙钛矿(结构)
光电子学
光学
衍射
化学
纳米技术
结晶学
物理
图层(电子)
有机化学
色谱法
作者
Jiang Guo,Sichun Li,Jiayun Kong,Yuxin Li,Li Zhou,Liyang Lou,Qiuyi Lv,Rong Tang,Ling-Ling Zheng,Bin Deng,Ruijin Yu
标识
DOI:10.1016/j.optlastec.2022.108347
摘要
A new yellow-emitting phosphor, NaCaTiTaO6:Dy3+, was synthesized via solid-phase synthesis at 1300 ℃. X-ray diffraction (XRD) analysis and Rietveld refinement showed that the prepared phosphors exhibited a stable double perovskite structure. The particle size of the phosphor was around 3.8 μm. The maximum emission peak at 574 nm is attributed to the 4F9/2→6H13/2 energy level transition under irradiation at 389 nm. The optimum Dy3+ doping concentration is 0.10 M equivalent, and concentration quenching is due to the nearest neighbor ion interaction. The luminescence intensity of the phosphor was reduced by only 15% at 420 K, exhibiting high thermal stability. Quantum yield (QY) was measured to be 26.31%. Finally, the Commission International de I’Eclairage (CIE) color coordinate of the phosphor for white light emitting diode (w-LED) was (0.314, 0.323), with a color rendering index (Ra) of 92 and a correlated color temperature (CCT) of 5578 K. Above all, the Dy3+-doped double perovskite NaCaTiTaO6:Dy3+ phosphor is expected to be used in w-LEDs.
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