Yellow phosphors of high quantum yields excitable by both ultraviolet and blue light with Gd3BWO9 as the host

作者：Tan, Jiwei; Dai, Yannan; Yang, Shuai; Wu, Jiahao; Yu, Bing; Zhang, Yuefei; Duan, Chungang; Zhao, Qingbiao^*

来源：Journal of Solid State Chemistry, 2022, 306: 122793.

DOI：10.1016/j.jssc.2021.122793

• Phosphors
• Yellow
• Quantum yield
• Solid state synthesis
• LED

Yellow phosphors play an important role in the fabrication of white light LEDs. In this study, we synthesized a series of yellow phosphors with Gd3BWO9 (GBWO) as the host material. The broad emission band in the range of 400 nm-620 nm is attributed to the P-3(0)-> S-1(0) transition of Bi3+. The emission color is tuned from green to yellow by co-doping of Eu3+ or Sm3+ with Bi3+ in GBWO. Additionally, yellow phosphors excited by blue light (lambda(ex) = 487 nm) were obtained by co-doping Tb3+ with Eu3+ or Sm3+ in GBWO host. The emission can be tuned from green to yellow and orange by adjusting the ratio of Tb3+/Eu3+ and Tb3+/Sm3+. The quantum yield of GBWO:0.25 Tb3+, 0.03Eu(3+) yellow phosphor reaches 70.2%, and the quantum yield of GBWO:0.25 Tb3+, 0.05Eu(3+) orange phosphor is as high as 83.7%. The present yellow phosphors that can be excited by both ultraviolet and blue light and having high quantum yields can be candidates for the application in white LED.

• 单位
  上海交通大学; 武汉工程大学