Efficient green upconversion luminescence in highly crystallized ultratransparent nano-glass ceramics containing isotropic KY3F10 nanocrystals.
Efficient green upconversion luminescence in highly crystallized ultratransparent nano-glass ceramics containing isotropic KY3F10 nanocrystals.
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DOI：
10.1364/ol.44.004674
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发表时间：
2019-10
期刊：
影响因子：
3.6
通讯作者：
Zhigang Gao;Zhiqiang Lai;Kailei Lu;Shu-Meng Guo;Lu Liu;Fei He;Piaoping Yang;Jing Ren;Jianzhong Zhang;Jun Yang
中科院分区：
文献类型：
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作者：
Zhigang Gao;Zhiqiang Lai;Kailei Lu;Shu-Meng Guo;Lu Liu;Fei He;Piaoping Yang;Jing Ren;Jianzhong Zhang;Jun Yang
以简单的三元氟氧化物玻璃为原料，通过控制晶化法制备了含各向同性KY3F10纳米晶的Yb3+/Er3+共掺纳米玻璃陶瓷(GCs)。所制得的纳米GC虽然具有很大的结晶度∼35%，但在300-700 nm的整个可见光波长范围内是超透明的。与前驱体玻璃相比，纳米GCs中Er3+的绿色上转换发光(UCL)显著增强(约55倍)。在功率密度为10W/cm2的GCS中，绿色UCL的绝对量子效率高达0.41±0.02%。在相同的激发条件下，UCL效率与著名的ZBLan：Yb3+/Er3+玻璃和含β-NaYF_4：Yb~(3+)/Er~(3+)纳米管的GCs相当，是含KYF_4：Yb~(3+)/Er~(3+)纳米管的近两倍。
Yb3+/Er3+ co-doped nano-glass ceramics (GCs) containing isotropic KY3F10 nanocrystals (NCs) are obtained from a simple ternary oxyfluoride glass by controlled crystallization. The nano-GCs thus obtained, albeit having very large crystallinity of ∼35%, are ultratransparent in the whole visible-light wavelength region of 300-700 nm. Remarkably enhanced green upconversion luminescence (UCL) of Er3+ (by 55 times) is observed in the nano-GCs as compared to the precursor glass. Absolute quantum efficiency of the green UCL reaches as high as 0.41±0.02% in the GCs under 10 W/cm2 power density. The UCL efficiency is comparable to that of the famous ZBLAN: Yb3+/Er3+ glass and GCs containing β-NaYF4:Yb3+/Er3+ NCs, and nearly twice as large as that of GCs containing KYF4:Yb3+/Er3+ NCs under the same excitation conditions.