Luminescence properties of Tb3+ doped Gd2(WO4)3 phosphor prepared by hydrothermal method

2018 International Conference on Advanced Materials, Intelligent Manufacturing and Automation

材料科学;机械制造;运输工程

Zhang, Zhengyang^1 ; Li, Jinkai^1 ; Wang, Wenzhi^1 ; Zhao, Weilin^1 ; Liu, Zongming^1

College of Materials Science and Engineering, University of Jinan, China^1

关键词: Color temperatures;    Exchange reaction;    Fluorescence decays;    Fluorescence lifetimes;    Hydrothermal methods;    Luminescence properties;    Quenching concentration;    White-light LEDs;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/382/2/022095/pdf
DOI  :  10.1088/1757-899X/382/2/022095

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The Gd2(WO4)3:Tb3+ phosphors have been successfully prepared using the hydrothermal method calcined at 900°C in this work. The crystal structure, PLE/PL and fluorescence decay behavior of samples were investigated in detail. Under the 270 nm excitation (4f8→4f75d1 transition of Tb3+), the (Gd2-xTbx)(WO4)3 (x=0.01-0.15) phosphors emit the strong green emission at 547 nm (5D4→7F5 transition of Tb3+). The quenching concentration was found to be ∼10% owing to the exchange reaction between Tb3+. The Tb3+ addition did not influence the CIE chromaticity coordinates (∼0.33±0.02, ∼0.60±0.02) and color temperatures (∼5542 K) of the (Gd2-xTbx)(WO4)3 phosphors. However, due to the energy transfer between Tb3+, the fluorescence lifetime for 547 nm emission decreased with the Tb3+ content increasing. The Gd2(WO4)3:Tb3+ phosphors with strong green emission are expected to be widely used in white light LED and display areas.