文献类型：期刊文献

英文题名：A novel red-emitting phosphor Ca2-xEuxGaTaO6 with high quantum efficiency and its applications in WLEDs and temperature sensing

作者：Zheng, Weicheng[1];Deng, Xutong[1];Zhou, Wenqian[1];Wen, Jindong[1];Zhu, Fangyin[1];Wu, Jinyu[1];Xiong, Zhengye[1]

机构：[1]Guangdong Ocean Univ, Sch Elect & Informat Engn, Zhanjiang 524088, Peoples R China

年份：2026

卷号：1074

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：SCI-EXPANDED(收录号：WOS:001798398800001)、、EI(收录号：20262420912951)、Scopus(收录号：2-s2.0-105041603861)、WOS

基金：Zhanjiang Science and Technology Program Project (Grant No. 2022A05022); and Key Areas Special Project for Higher Education Institutions in Guangdong Province (Grant No. 2024ZDZX4062) are appreciated because of their financial support. The authors extend their gratitude to Mr./Ms. Cao from Scientific Compass (www.shiyanjia.com) for providing invaluable assistance with the PL analysis.

语种：英文

外文关键词：Phosphor thin film; White light-emitting diodes; Optical temperature sensing; Luminescence

外文摘要：A novel double perovskite phosphor Ca2-xEuxGaTaO6 features high quantum efficiency and excellent optical thermometric properties. First-principles calculations using the DS-PAW code show that the band gap of Ca2GaTaO6 is 4.0127 eV. The optimal doping concentration of Eu3 + is determined to be 10 mol%, with concentration quenching induced by non-radiative energy transfer (NRET) mediated by dipole-dipole interactions. Notably, the internal quantum efficiency (IQE) of Ca1.9Eu0.1GaTaO6 reaches an impressive 96.66%. In an innovative approach, phosphor thin films were fabricated, which demonstrate a 10.6% enhancement in thermal luminescence stability at 423 K compared to the powder sample, along with improved resistance to thermal quenching. The absolute sensitivity (Sa) of the phosphor thin film and powder sample is 0.32 K-1 and 1.58 K-1, respectively. Their corresponding relative sensitivity (Sr) is 3.20%.K-1 and 1.12%.K-1. These results clearly indicate that the film formation process effectively preserves the intrinsic optical thermometric properties of the phosphor. A white light-emitting diode (WLED) assembled with this red-emitting phosphor achieves a color rendering index (CRI) of 94.5. Collectively, these findings highlight that the phosphor possesses outstanding luminescent and optical thermometric performances, positioning it as a promising multifunctional material for advanced applications in white LEDs and optical temperature sensors.