Red Photoluminescence from Fe-Doped MgAl2O4 Crystals

ECS Journal of Solid State Science and Technology Pub Date : 2024-05-09 DOI:10.1149/2162-8777/ad497b

Ami Hitomi, Arisa Mori, Ririka Watanabe, Toru Katsumata, Hiroaki Aizawa

引用次数: 0

Abstract

The influence of variations in composition (x = MgO/Al2O3 = 0.3–1.0), Fe2O3 concentrations (0.05 mol%–2.0 mol%), and O2 concentrations (100 vol% and 0 vol%) in the atmosphere on the PL characteristics of Fe-doped MgAl2O4 crystals were investigated using single phase spinel crystals grown by FZ technique. The peak wavelength shift of photoluminescence at around 730 nm are observed depending on the Fe2O3 concentration and composition. Concentration quenching of red PL occurred at Fe2O3 concentration above 0.1 mol%. PL intensity was higher in samples grown in 100 vol% O2 compared to those grown in 100 vol% Ar. PL intensity from Fe-doped MgAl2O4 increased with increasing compositions x from 0.3 to 1.0. MgAl2O4 doped with 0.1 mol% Fe2O3, and a stoichiometric composition (x = 1.0) grown in 100 vol% O2, demonstrated strong red PL with ultraviolet-C (UVC) lights excitation.

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掺杂铁的 MgAl2O4 晶体发出红色光致发光

利用 FZ 技术生长的单相尖晶石晶体，研究了大气中成分（x = MgO/Al2O3 = 0.3-1.0）、Fe2O3 浓度（0.05 mol%-2.0 mol%）和 O2 浓度（100 vol% 和 0 vol%）的变化对 Fe 掺杂 MgAl2O4 晶体的光致发光特性的影响。根据 Fe2O3 的浓度和成分，在 730 nm 左右观察到了光致发光峰值波长的移动。当 Fe2O3 的浓度超过 0.1 摩尔%时，红色 PL 出现浓度淬灭。与在 100 vol% Ar 中生长的样品相比，在 100 vol% O2 中生长的样品的聚光强度更高。随着成分 x 从 0.3 到 1.0 的增加，掺杂铁的 MgAl2O4 的聚光强度也随之增加。掺杂了 0.1 mol% Fe2O3 的 MgAl2O4 和在 100 vol% O2 中生长的化学成分（x = 1.0）在紫外线-C（UVC）灯的激发下显示出强烈的红色聚光。

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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ECS Journal of Solid State Science and Technology

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