Electron paramagnetic resonance and optical properties of green-emitting Mn(II)-doped hardystonite phosphor prepared by sol-gel method

被引：2

作者：

Singh V. ^{[1
]}

Kaur S. ^{[2
]}

Annapurna Devi C.B. ^{[3
]}

Rao A.S. ^{[2
]}

Joo J.B. ^{[1
]}

机构：

[1] Department of Chemical Engineering, Konkuk University, Seoul

[2] Department of Applied Physics, Delhi Technological University, Bawana Road, New Delhi

[3] Department of Physics, Vignan's Lara Institute of Technology & Science, Vadlamudi, Andhra Pradesh, Guntur

来源：

Optik | 2022年 / 266卷

基金：

新加坡国家研究基金会;

关键词：

Ca[!sub]2[!/sub]ZnSi[!sub]2[!/sub]O[!sub]7[!/sub; EPR; Luminescence; Mn(II); Phosphor; Sol-gel;

D O I：

10.1016/j.ijleo.2022.169553

中图分类号：

学科分类号：

摘要：

A series of Mn(II)-doped hardystonite phosphors was obtained by using a sol-gel technique. Structural, morphological, and optical properties of the prepared samples were investigated by X-ray diffraction, Fourier transform infrared, scanning electron microscopy and diffuse reflectance spectrum. The photoluminescence excitation and emission spectra of the prepared phosphors exhibited a strong band at ~ 254 nm and an intensified emission band at ~ 525 nm, respectively. Of all the prepared phosphors, 0.03Mn(II) doped hardystonite phosphor possessed a highly intense emission band, which demonstrated that 0.03 mol was the optimized concentration of Mn(II) ions. All the prepared phosphors emitted a bright green color, as confirmed by the Commission International de I′Eclairage co-ordinates. Electron paramagnetic resonance study suggested the existence of Mn(II) ions at sites with octahedral symmetry (g value ~2) and the dominance of covalent bonding in the prepared phosphors. © 2022 Elsevier GmbH

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