Comparison of optical parameters and luminescence between Er3+/Yb3+ codoped phosphate glass ceramics and precursor glasses
Comparison of optical parameters and luminescence between Er3+/Yb3+ codoped phosphate glass ceramics and precursor glasses
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DOI：
10.1063/1.3028268
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发表时间：
2008-12
影响因子：
3.2
通讯作者：
Xiaochen Yu;F. Song;Wentao Wang;Lanjun Luo;Lin Han;Zhenzhou Cheng;T. Sun;Jianguo Tian;E. Pun
中科院分区：
文献类型：
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作者：
Xiaochen Yu;F. Song;Wentao Wang;Lanjun Luo;Lin Han;Zhenzhou Cheng;T. Sun;Jianguo Tian;E. Pun
制备了Er 3 +/Yb 3+共掺透明磷酸盐前驱体玻璃和微晶玻璃，并对其进行了表征。利用X射线衍射研究了ErPO 4和YbPO 4纳米晶体的形成。基于Judd-Ofelt理论计算了Er 3+在微晶玻璃和前驱体玻璃中的强度参数、自发辐射跃迁几率、分支比和辐射寿命，并根据所获得的光学参数确定了微晶玻璃的晶化过程。在975 nm波长激发下，观察到Er 3 + I413/2→I415/2跃迁的上转换发光和1.54 μm强荧光，其量子效率为95%，上转换发光的跃迁机制为双光子过程。
Er3+/Yb3+ codoped transparent phosphate precursor glasses and glass ceramics have been fabricated and characterized. The formation of ErPO4 and YbPO4 nanocrystals was studied using x-ray diffraction. The intensity parameters, the spontaneous radiative transition probabilities, the branching ratios, and the radiative lifetimes of Er3+ in both glass ceramics and precursor glasses were calculated based on the Judd–Ofelt theory, and the crystallization process in the glass ceramics is confirmed by the optical parameters obtained. Under 975 nm wavelength excitation intense 1.54 μm fluorescence and upconversion luminescence were observed in the glass ceramics, the quantum efficiency of the Er3+ I413/2→I415/2 transition is 95%, and the transition mechanisms of the upconversion luminescence are due to a two-photon process.