文献类型：期刊文献

英文题名：Bi3+-doped Ba2Y1?xLuxNbO6:Bi3+ (0 ≤ x ≤ 1.0) solid solution phosphors: tunable photoluminescence and application for white LEDs

作者：Zhou, Changshun[1,2]; Jiang, Chenhui[1]; Zhao, Jun[3]; Zhan, Peimin[1]; Tang, Xufang[4]; Jin, Dingfeng[4]; Wang, Xinxing[1]

机构：[1] Yuanpei College, Shaoxing University, Shaoxing, 312000, China; [2] Civil Engineering College, Central South University, Changsha, Hunan, 410083, China; [3] Sichuan College of Architectural Technology, Deyang, 618000, China; [4] College of Materials and Chemistry, China Jiliang University, Hangzhou, 310018, China

年份：2021

卷号：44

期号：1

外文期刊名：Bulletin of Materials Science

收录：EI(收录号：20210809944800)、Scopus(收录号：2-s2.0-85101454723)

语种：英文

外文关键词：Photoluminescence - Efficiency - Density functional theory - Light emitting diodes - Solid state reactions - High temperature applications - Solid solutions - Phosphors - X ray diffraction

外文摘要：In this work, we use the conventional high temperature solid-state reaction to prepare Bi3+-doped Ba2Y1?xLuxNbO6:Bi3+ (0 ≤ x ≤ 1.0) solid solution phosphors. To study the Lu3+ content-dependent structural evolution and photoluminescence (PL) properties of the samples, the powder X-ray diffraction (pXRD), density functional theoretical (DFT) calculations, UV–visible diffuse reflectance and PL spectra are used. We find that all the phosphors are double-perovskite structural phase with a cubic space group of Fm 3 ˉ m , and the XRD positions shift to higher diffraction angle with the increase in Lu3+ content. The emission positions of the samples tune from 447 to 493 nm, which are due to the crystal field modulation around the Bi3+ ion. Among the obtained samples, the Ba2Y0.7Lu0.3NbO6:Bi3+ shows the best quantum efficiency (QE) of 57%. By using the optimal Ba2Y0.7Lu0.3NbO6:Bi3+ solid solution phosphor, the red-emitting CaAlSiN:Eu2+ phosphor, and a commercial 365 nm UV LED chip, we have fabricated a white LED device with the CIE coordinates at (0.378, 0.373), colour temperature (CT) of 3513 K, colour rendering index (CRI) of 67.1 and luminous efficiency of 39 lm W?1. ? 2021, Indian Academy of Sciences.