Upconversion luminescence in Er-doped γ-AlON ceramic phosphors
Upconversion luminescence in Er-doped γ-AlON ceramic phosphors
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DOI：
10.1063/1.3125516
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发表时间：
2009-05
影响因子：
3.2
通讯作者：
Fusui Zhang;Shixiang Wang;X. J. Liu;L. An;Xiaoxue Yuan
中科院分区：
文献类型：
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作者：
Fusui Zhang;Shixiang Wang;X. J. Liu;L. An;Xiaoxue Yuan
采用碳热还原、氮化和固态合成相结合的方法制备了不同Er3+浓度的上转换发光用γ-AlON:Er3+荧光粉。研究了Er3+含量对发射光谱的影响。在980 nm二极管激光器的激发下，Er3+离子分别发生了S43/2/H211/2→I415/2和F49/2→I415/2的跃迁，产生了以548 nm为中心的绿色发射和以666 nm为中心的红色发射。泵浦功率依赖性表明上转换发光涉及双光子过程。随着Er3+浓度的增加，红色发射与绿色发射的比值增大。讨论了可能的机理。
γ-AlON:Er3+ phosphors with different Er3+ concentration for upconversion luminescence were prepared by a combination of carbothermal reduction and nitridation and solid-state synthesis methods. The effect of Er3+ content on emission spectra was investigated. Under the excitation of 980 nm diode laser, green emission centered at 548 nm and red emission centered at 666 nm were observed, which are ascribed to the transition of S43/2/H211/2→I415/2 and F49/2→I415/2 of Er3+ ions, respectively. The pump power dependence indicates a two-photon process involved in the upconversion luminescence. The ratio of red emission relative to green emission was enhanced with the increase in Er3+ concentration. The possible mechanisms were discussed.