High-brightness red-emitting double-perovskite phosphor Sr2LaTaO6∶Eu3+ with high color purity and thermal stability [Invited]

• 作者: Zongjie Zhang Wei Li Nan Ma Xiaoyong Huang
• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: Metal Halide Perovskite and Their Applications
• 页码范围: 13-16
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL202119.030003

摘要

Bright Eu3+-activated double-perovskite Sr2LaTaO6 red-emitting phosphors were successfully synthesized by a high-tem-perature solid-state method.Under near-ultraviolet excitation at 394 nm,optimal Sr2LaTaO6∶0.2Eu3+ phosphors emittedhigh-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∶ 0.2Eu3+ phos-phors was characterized by temperature-dependent emission spectra at different temperatures from 303 to 463 K,and theemission intensity at 423 K remained 73％ of its value at 303 K.All of the results suggested that the as-preparedSr2LaTaO6∶0.2Eu3+ phosphors can be used in near-ultraviolet-excitable white light-emitting diodes as a red-emittingcolor converter.