Photoluminescence features of trivalent holmium doped Ca2La8(SiO4)6O2 phosphors

IF 0.7 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

International Journal of Materials Research Pub Date : 2023-08-31 DOI:10.1515/ijmr-2022-0314

Vijay P. Singh, A. Nande, S. Dhoble

引用次数: 0

Abstract

Abstract This study examines the optical properties of Ca2La8−x(SiO4)6O2:xHo3+ phosphors derived using the sol–gel method. X-ray diffraction data and Rietveld analysis confirmed that the phosphors formed in hexagonal phase with an average estimated crystalline size of 27 nm. The prominent excitation peak observed at wavelength 463 nm corresponding to excitation energy 2.68 eV was due to the 5I8 → 5G6 + 5F1 transition. The photoluminescence emission spectra revealed that the synthesized phosphors emitted in the green color region with the 5S2 + 5F4 → 5I8 transition, releasing 2.27 eV energy. The emission and excitation analyses revealed the presence of concentration quenching as the Ho3+ concentration exceeded 0.03 mol in the Ca2La8−x(SiO4)6O2:xHo3+ series. Further, photometry analysis demonstrated a color purity exceeding 94 %, which supports the candidacy of these phosphors for solid-state lighting applications.

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三价钬掺杂Ca2La8(SiO4)6O2荧光粉的光致发光特性

摘要:本文研究了溶胶-凝胶法制备的Ca2La8−x(SiO4)6O2:xHo3+荧光粉的光学性质。x射线衍射数据和Rietveld分析证实，荧光粉形成于六方相，平均估计晶体尺寸为27 nm。5I8→5G6 + 5F1跃迁在波长463 nm处形成激发峰，激发能为2.68 eV。光致发光发射光谱显示，合成的荧光粉在绿色区域以5S2 + 5F4→5I8跃迁，释放能量为2.27 eV。发射和激发分析表明，Ca2La8−x(SiO4)6O2:xHo3+系在Ho3+浓度超过0.03 mol 时存在浓度猝灭现象。此外，光度分析表明颜色纯度超过94 %，这支持了这些荧光粉用于固态照明应用的候选性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Materials Research 工程技术-冶金工程

CiteScore

1.30

自引率

12.50%

发文量

119

审稿时长

6.4 months

期刊介绍： The International Journal of Materials Research (IJMR) publishes original high quality experimental and theoretical papers and reviews on basic and applied research in the field of materials science and engineering, with focus on synthesis, processing, constitution, and properties of all classes of materials. Particular emphasis is placed on microstructural design, phase relations, computational thermodynamics, and kinetics at the nano to macro scale. Contributions may also focus on progress in advanced characterization techniques. All articles are subject to thorough, independent peer review.