Abstract

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 Sr₂LaTaO₆:0.2Eu³⁺ 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 Sr₂LaTaO₆:0.2Eu³⁺ 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 Sr₂LaTaO₆:0.2Eu³⁺ phosphors can be used in near-ultraviolet-excitable white light-emitting diodes as a red-emitting color converter.

© 2021 Chinese Laser Press

Synthesis and photoluminescence characteristics of the LiGd₃(MoO₄)₅:Eu³⁺ red phosphor with high color purity and brightness

Dasheng Lu, Xinghong Gong, Yujin Chen, Jianhua Huang, Yanfu Lin, Zundu Luo, and Yidong Huang
Opt. Mater. Express 8(2) 259-269 (2018)

High-brightness and high-color purity red-emitting Ca₃Lu(AlO)₃(BO₃)₄:Eu³⁺ phosphors with internal quantum efficiency close to unity for near-ultraviolet-based white-light-emitting diodes

Xiaoyong Huang, Shaoying Wang, Bin Li, Qi Sun, and Heng Guo
Opt. Lett. 43(6) 1307-1310 (2018)

High color rendering white light-emitting-diode illuminator using the red-emitting Eu²⁺-activated CaZnOS phosphors excited by blue LED

Te-Wen Kuo, Wei-Ren Liu, and Teng-Ming Chen
Opt. Express 18(8) 8187-8192 (2010)

Single-phase tunable white-light-emitting Sr₃ La(PO₄)₃ : Eu²⁺, Mn²⁺ phosphor for white LEDs

Zhijun Wang, Shuqin Lou, Panlai Li, and Zhenggang Lian
Appl. Opt. 56(4) 1167-1172 (2017)

Structure and photoluminescence properties of KSr₄(BO₃)₃:Eu³⁺ red-emitting phosphor

Yi Zhang, Li Wu, Minyuan Ji, Biao Wang, Yongfa Kong, and Jingjun Xu
Opt. Mater. Express 2(1) 92-102 (2012)