Studies on Up-Conversion Photoluminescence Exhibited by Er3+-Doped Akermanite (Di-Calcium Magnesium Silicate) Phosphors

IF 0.4 4区物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY Russian Physics Journal Pub Date : 2024-09-20 DOI:10.1007/s11182-024-03271-5

N. M. Prassanno, P. P. Nimje, R. Shrivastava

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Abstract

The preparation of di-calcium magnesium silicate Ca₂MgSi₂O₇ doped with 0.5, 1.0, 1.5, 2.0 and 2.5 mol.% of erbium (III) using a solid state reaction method is reported. An X-ray diffraction pattern obtained from the sample at optimum photoluminescence (PL) emission intensity exhibits a quite prominent resemblance with the crystallographic open database (COD) with entry 96-900-6449. This confirms the valid preparation of tetragonal akermanite with a P-4 21 m (113) space group. A 980 nm laser source is used as an excitation radiation for recording the PL emission spectra. The emission spectra exhibit two distinguished prominent peaks centered at 534 and 623 nm. These peaks are attributed to the ²H_11/2 → ⁴I_15/2 and ⁴F_9/2 → ⁴I_15/2 transitions of erbium (III) ions respectively. The sample with 2.0 mol.% of erbium (III) exhibits an optimum PL intensity, and beyond this the concentration quenching occurs. The thermoluminescence studies of the same sample suggest an existence of the near second order kinetics. Therefore, the sample could be a very good candidate in LED applications.

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掺杂 Er3+ 的 Akermanite（硅酸二钙镁）荧光粉的上转换光致发光研究

报告采用固态反应方法制备了掺有 0.5、1.0、1.5、2.0 和 2.5 mol.% 铒 (III) 的硅酸二钙镁 Ca2MgSi2O7。该样品在最佳光致发光（PL）发射强度下获得的 X 射线衍射图样与晶体学开放数据库（COD）中的条目 96-900-6449 非常相似。这证明制备具有 P-4 21 m (113) 空间群的四方天青石是有效的。在记录 PL 发射光谱时，使用了 980 nm 激光作为激发光源。发射光谱显示出以 534 纳米和 623 纳米为中心的两个不同的突出峰值。这些峰分别归因于铒（III）离子的 2H11/2 → 4I15/2 和 4F9/2 → 4I15/2 转变。铒（III）含量为 2.0 mol.% 的样品显示出最佳的 PL 强度，超过这一浓度则会出现浓度淬灭。同一样品的热致发光研究表明存在接近二阶的动力学。因此，该样品可以很好地应用于 LED。

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

Russian Physics Journal PHYSICS, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

50.00%

发文量

208

审稿时长

3-6 weeks

期刊介绍： Russian Physics Journal covers the broad spectrum of specialized research in applied physics, with emphasis on work with practical applications in solid-state physics, optics, and magnetism. Particularly interesting results are reported in connection with: electroluminescence and crystal phospors; semiconductors; phase transformations in solids; superconductivity; properties of thin films; and magnetomechanical phenomena.