文献类型：期刊文献

英文题名：High quantum efficiency Ca2-xEuxAlTaO6 double perovskite phosphors: Applications in WLED and temperature sensing fields

作者：Zhu, Fangyin[1];Zheng, Weicheng[1];Li, Xiaohui[1];Hong, Xiaoyu[1];Yu, Junwen[1];Xiong, Zhengye[1]

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

年份：2026

卷号：1080

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：SCI-EXPANDED(收录号：WOS:001847823100001)、、EI(收录号：20263321280232)、Scopus(收录号：2-s2.0-105046923862)、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：White light-emitting diodes; Optical temperature sensing; Luminescence

外文摘要：In this work, a series of novel double perovskite phosphors, Ca2-xEuxAlTaO6, were successfully synthesized via the high-temperature solid-state reaction method. The material exhibits a relatively high internal quantum efficiency and excellent optical thermometric properties. Key properties of the samples were systematically investigated, including X-ray diffraction (XRD), crystal structure, luminescence spectra, elemental composition, thermal stability, quantum efficiency, and fluorescence decay lifetime. The quantum efficiency of the sample reaches as high as 73.96%, and the maximum relative sensitivity (Sr) is up to 7.29%& sdot;K- 1, indicating promising application potential in temperature sensing. Based on the optimally doped Ca2AlTaO6:0.18 Eu3+ red phosphor, a WLED device was fabricated by combining it with a commercial 395 nm LED chip. The device achieves a color rendering index (Ra) of 95.9, demonstrating excellent color rendering performance. In summary, Ca2-xEuxAlTaO6 phosphors possess high quantum efficiency and elevated relative sensitivity (Sr), exhibiting excellent luminescent properties and optical thermometric performance, as well as good compatibility with LED devices. Consequently, they show significant multifunctional application potential in fields such as light-emitting diodes and optical temperature sensors.