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]Shaoxing Univ, Yuanpei Coll, Shaoxing 312000, Peoples R China;[2]Cent South Univ, Civil Engn Coll, Changsha 410083, Hunan, Peoples R China;[3]Sichuan Coll Architectural Technol, Deyang 618000, Peoples R China;[4]China Jiliang Univ, Coll Mat & Chem, Hangzhou 310018, Peoples R China

年份：2021

卷号：44

期号：1

外文期刊名：BULLETIN OF MATERIALS SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000620080500004)、、WOS

基金：This work is funded by the project of Southwest University of Science and Technology Natural Science Foundation (No. 18zx7125).

语种：英文

外文关键词：Bi3+; perovskite; tunable photoluminescence; white LEDs

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 Fm3m, 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.