High-brightness red-emitting double-perovskite phosphor Sr_(2)LaTaO_(6):Eu^(3+) with high color purity and thermal stability[Invited]  

作　　者：Zongjie Zhang Wei Li Nan Ma Xiaoyong Huang 张宗杰;李伟;马楠;黄小勇(College of Physics and Optoelectronics,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]College of Physics and Optoelectronics,Taiyuan University of Technology,Taiyuan 030024,China

出　　处：《Chinese Optics Letters》2021年第3期13-16,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 51502190);Young Sanjin Scholars Distinguished Professor Program of Shanxi Province;Open Fund of the State Key Laboratory of Luminescent Materials and Devices (South China University of Technology, No. 2020-skllmd-01);Graduate Education Innovation Project of Shanxi Province。

摘　　要：Bright Eu3+-activated double-perovskite Sr2LaTaO6 red-emitting phosphors were successfully synthesized by a high-temperature solid-state method. Under near-ultraviolet excitation at 394 nm, optimal Sr2LaTaO6∶0.2 Eu3+phosphors emitted high-brightness red light around 613 nm with the International Commission on Illumination chromaticity coordinates(0.650,0.349). Notably, the color purity can reach 92%. Impressively, the favorable thermal stability of the Sr2LaTaO6∶0.2 Eu3+phosphors was characterized by temperature-dependent emission spectra at different temperatures from 303 to 463 K, and the emission intensity at 423 K remained 73% of its value at 303 K. All of the results suggested that the as-prepared Sr2LaTaO6∶0.2 Eu3+phosphors can be used in near-ultraviolet-excitable white light-emitting diodes as a red-emitting color converter.

关 键 词：Sr_(2)LaTaO_(6) Eu^(3+) DOUBLE-PEROVSKITE PHOSPHORS 

分 类 号：TQ422[化学工程] TN312.8[电子电信—物理电子学]