Photoluminescence and thermoluminescence study of Ca1.02Sr1.98Al2O6: Dy phosphor synthesized by combustion method

IF 2.2 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Letters: X Pub Date : 2023-06-01 DOI:10.1016/j.mlblux.2023.100203

Sonal P. Tatte , Yatish R. Parauha , N.S. Dhoble , G.C. Mishra , S.J. Dhoble

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Abstract

In the present work, we have synthesized Ca_1.02Sr_1.98Al₂O₆ phosphors with different doping concentrations of Dy³⁺ (0.5 mol% to 4.0 mol%) by simple combustion method. The phase purity of the prepared phosphor has been confirmed by X-ray diffraction (XRD). Detailed investigations have been carried out to study the photoluminescence (PL) and thermoluminescence (TL) properties of the synthesized phosphors. Under 348 nm excitation, the PL emission spectrum shows two intense emission bands at blue and yellow color region due to the ⁴F_9/2 → ⁶H_15/2 and ⁴F_9/2 → ⁶H_13/2 transition of Dy³⁺ ions. In addition, the TL properties of gamma-irradiated Dy³⁺ doped Ca_1.02Sr_1.98Al₂O₆ phosphors were investigated. According to the obtained PL and TL results, the synthesized phosphors have good prospects for future investigations on white LED and TLD applications.

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燃烧法制备Ca1.02Sr1.98Al2O6: Dy荧光粉的光致发光和热致发光研究

本文采用简单燃烧法合成了掺杂不同浓度Dy3+ (0.5 ~ 4.0 mol%)的Ca1.02Sr1.98Al2O6荧光粉。用x射线衍射(XRD)证实了所制备的荧光粉的相纯度。对合成的荧光粉的光致发光(PL)和热致发光(TL)性能进行了详细的研究。在348 nm激发下，由于Dy3+离子的4F9/2→6H15/2和4F9/2→6H13/2跃迁，PL发射光谱在蓝色和黄色区域显示出两个较强的发射带。此外，还研究了γ辐照Dy3+掺杂Ca1.02Sr1.98Al2O6荧光粉的TL特性。根据所获得的PL和TL结果，所合成的荧光粉在白光LED和TLD方面具有良好的应用前景。

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