A novel UV pumped white-emitting phosphor La3SbO7:Dy3+ for white light-emitting diodes

2019 5th International Conference on Energy Materials and Environment Engineering

能源学;生态环境科学

Liu, Simei^1^2 ; Deng, Bin^1^3 ; Chen, Jun^1^3 ; Liu, Hui^1^3 ; Zhou, Chong-Song^1^3 ; Yu, Ruijin^2

College of Chemistry and Biology and Environmental Engineering, Xiangnan University, Chenzhou, Hunan

423043, China^1

College of Chemistry and Pharmacy, Northwest AandF University, Yangling, Shaanxi

712100, China^2

Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application, Chenzhou, Hunan

423043, China^3

关键词: Concentration quenching;    Emission intensity;    Luminescent material;    Photoluminescence properties;    Photoluminescence spectrum;    Solid-state routes;    White emitting phosphors;    White light emitting diodes;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/295/3/032035/pdf
DOI  :  10.1088/1755-1315/295/3/032035

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The dysprosium activating La3SbO7 white-emitting phosphors were prepared via solid-state route at 1350°C in air atmosphere and its photoluminescence properties were examined by X-ray diffraction (XRD) and photoluminescence spectra in details. La3SbO7:Dy3+ phosphor with excitation at 353 nm emitted blue light (490 nm) and yellow (580 nm) which were assigned to 4F9/2-6Hj/2 transitions (J=15, 13), respectively. Moreover, the transition 4F9/2-6H13/2 was the strongest emission intensity between two typical emission bands. The CIE of prepared phosphors entered into white region. The optimal emission intensity of the La3SbO7:Dy3+ luminescent materials was realized when x = 0.15 and the concentration quenching mechanism of Dy3+ has also been tested. And the La3SbO7:Dy3+ can be as a white-emitting phosphor applied in n-UV LEDs on results.