Study on luminescence properties of Gd2O2S: Tb3+ phosphors with different excitation sources

Le Chen; Zhaohui Bai; Quansheng Liu; Wenjing Luo

doi:10.1117/12.2687075

6 August 2023 Study on luminescence properties of Gd₂O₂S: Tb³⁺ phosphors with different excitation sources

Le Chen, Zhaohui Bai, Quansheng Liu, Wenjing Luo

Proceedings Volume 12781, International Conference on Optoelectronic Information and Functional Materials (OIFM 2023); 1278134 (2023) https://doi.org/10.1117/12.2687075
Event: 2023 International Conference on Optoelectronic Information and Functional Materials (OIFM 2023), 2023, Guangzhou, JS, China

Abstract

A series of Gd_2-XO₂S: Tb_X (X=0.01~0.11) phosphors were prepared by molten salt method at 950 ℃ using the low melting point characteristic of Na₂S₂O₃ (48 ℃), and the effect of Tb³⁺ doping concentration on the luminescent properties of phosphors was studied. The materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), laser particle size analyzer, photoluminescence (PL) and cathodoluminescence (CL). The results showed that Gd₂O₂S phosphor with good dispersion and crystallinity was prepared. The PL spectrum shows that the optimum doping concentration of Tb³⁺ is 0.07. When the concentration reaches 0.09, the integral ratio of blue/green light intensity of phosphor decreases to a fixed value; The CL spectrum shows that the optimum doping concentration is 0.08. When the concentration reaches 0.06, the integral ratio of blue/green light intensity of the phosphor decreases to a fixed value; The normalized spectral analysis shows that the continuous increase of Tb³⁺ doping under different excitation sources will reduce the ⁵D₃-⁷F_J (J=6,5,4) transition of the material.

Citation Download Citation

Le Chen, Zhaohui Bai, Quansheng Liu, and Wenjing Luo "Study on luminescence properties of Gd₂O₂S: Tb³⁺ phosphors with different excitation sources", Proc. SPIE 12781, International Conference on Optoelectronic Information and Functional Materials (OIFM 2023), 1278134 (6 August 2023); https://doi.org/10.1117/12.2687075

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KEYWORDS

Terbium

Gadolinium

Doping

Luminescence

Particles

Emission spectrum

Electron beams

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