4.7 Article

Photoluminescence enhancement of orange-emitting Ca5(PO4)2SiO4:Sm3+ phosphor through charge compensation of A+ (Li+, Na+ and K+) ions for white light-emitting diodes

期刊

DALTON TRANSACTIONS
卷 51, 期 22, 页码 8874-8884

出版社

ROYAL SOC CHEMISTRY
DOI: 10.1039/d2dt01034h

关键词

-

资金

  1. Department of Science and Technology of Sichuan Province [2020YJ0157, 2021JDTD0013]

向作者/读者索取更多资源

The orange-emitting Ca5-x(PO4)(2)SiO4:xSm(3+) (C5PSO:Sm3+) phosphor was prepared via a simple solid-state method, and codoped with A(+) (A = Li, Na, and K) for improved luminescence performance. The effects of Sm3+ doping and Sm3+/A(+) codoping on the crystal structure and luminescence performance were investigated. A significant improvement in luminescence intensity was achieved through charge compensation of codoped A(+) ions.
The orange-emitting Ca5-x(PO4)(2)SiO4:xSm(3+) (C5PSO:Sm3+) phosphor was prepared via a simple solid-state method, and the charge compensators A(+) (A = Li, Na and K) were codoped into C5PSO:Sm3+ for improving the luminescence performance. The influences of Sm3+ doping and Sm3+/A(+) codoping on the crystal structure and the luminescence performance of the C5PSO:Sm3+ phosphor were investigated in detail. The X-ray diffraction results exhibited that all the as-prepared samples were assigned to the standard structure Ca-5(PO4)(2)SiO4 possessing the P63/m space group. Upon near-ultraviolet excitation at 401 nm, the characteristic emission peaks of the C5PSO:Sm3+ phosphors are located at 558 nm, 605 nm and 656 nm, respectively, which are derived from the (4)G(5/2) -> H-6(J) (J = 5/2, 7/2, and 9/2) electron transitions of Sm3+ ions. Furthermore, a significant luminescence improvement of the C5PSO:Sm3+ phosphor was attained through charge compensation of codoped A(+) ions, and the emission intensity is enhanced by 1.79-, 1.45-, and 1.14-fold for K+, Na+, and Li+, respectively. In addition, the actual orange-red LED and w-LED fabricated with the as-prepared C5PSO:Sm3+,K+ phosphor showed excellent optical performance. All the results demonstrated that the C5PSO:Sm3+,K+ orange-emitting phosphor could act as a potential orange-red component in the w-LEDs illumination field.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据