期刊
JOURNAL OF RARE EARTHS
卷 39, 期 11, 页码 1327-1335出版社
ELSEVIER
DOI: 10.1016/j.jre.2020.08.002
关键词
Luminescence; Phosphor; Antimonate; Gd2InSbO7; Rare earths
资金
- Fundamental Research Funds for the Central Universities [2452019076]
- Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds and Applications [2019XGJSKFJJ01]
- Construction Program of the Key Discipline in Hunan Province
- Education Department of Hunan Province [18A465]
- Science and Technology Plan of Chenzhou City [jsyf2017014]
Gd2InSbO7:Eu3+ red phosphors were successfully synthesized and exhibited good luminescence properties, showing potential applications in white LEDs.
Gd2InSbO7:Eu3+ red phosphors were successfully synthesized via high-temperature solid-state reaction. The phase purity, particle size, and luminescence properties of obtained phosphors were measured and analyzed in detail. The Gd2InSbO7 lattice possesses cubic structure with Fd-3m (227) space group. The phosphors emit bright red emission at 628 nm under 393 nm excitation, and this phenomenon is attributed to the D-5(0)-F-7(2) transition. The Judd-Ofelt parameters (Omega(2), Omega(4)), transition ratio, and branching ratios (beta) of Eu3+-doped Gd2InSbO7 phosphor were calculated on the basis of the emission spectra and decay lifetimes. The optimal content in Gd2InSbO7:xEu(3+) is identified to be 15 mol%. The thermal quenching of Gd2InSbO7:Eu3+ is found to be over 500 K, and its activation energy is 0.26 eV. The Commission Internationale de l'Eclairage (CIE) chromaticity coordinates of Gd2InSbO7:15%Eu3+ are (0.629, 0.371), which are close to ideal red chromaticity coordinates (0.670, 0.330). The fabricated w-LED exhibits good color rendering index (R-a) (86), correlated color temperature (CCT) (6997 K), and CIE chromaticity coordinates (0.302, 0.330). The obtained results demonstrate that Gd2InSbO7:Eu3+ phosphors have potential applications in white LEDs. (C) 2021 The Authors. Published by Elsevier B.V.
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。
推荐
暂无数据