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Quantum cutting and near-infrared emissions in Ho3+/Yb3+ codoped transparent glass-ceramics
Journal of Luminescence ( IF 3.6 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.jlumin.2020.117424
P. Babu , I.R. Martín , V. Lavín , U.R. Rodríguez-Mendoza , Hyo Jin Seo , K. Venkata Krishanaiah , V. Venkatramu

Abstract Visible to near-infrared quantum cutting and 2.0 μm near-infrared emissions have been obtained in Ho3+/Yb3+ co-doped oxyfluoride transparent glass-ceramic, containing cubic CaF2 nanocrystals, under 473 nm excitation. The formation of CaF2 nanocrystals and the incorporation of Ho3+/Yb3+ ions into these nanocrystals have been confirmed from x-ray diffraction and photoluminescence studies, respectively. Lifetime of 1.2 μm emission has been enhanced by three orders of magnitude in the glass-ceramic compared to that of the precursor glass. Time-resolved near-infrared quantum cutting emission of Yb3+ ions at different delay times under 532 nm laser excitation has also been obtained. Studies reveal that the infrared quantum cutting emission of Yb3+ and Ho3+ ions in the CaF2 nanocrystalline glass-ceramic could improve the efficiency of crystalline-Si solar cells, and that the 1.2 μm emission could be useful for further enhancing transmission windows using optical amplifiers.

中文翻译:

Ho3+/Yb3+ 共掺杂透明微晶玻璃中的量子切割和近红外发射

摘要 在含有立方 CaF2 纳米晶体的 Ho3+/Yb3+ 共掺杂氟氧化物透明微晶玻璃中,在 473 nm 激发下获得了近红外量子切割可见光和 2.0 μm 近红外发射。CaF2 纳米晶体的形成和 Ho3+/Yb3+ 离子掺入这些纳米晶体已分别通过 X 射线衍射和光致发光研究得到证实。与前体玻璃相比,微晶玻璃的 1.2 μm 发射寿命提高了三个数量级。还获得了在 532 nm 激光激发下不同延迟时间 Yb3+ 离子的时间分辨近红外量子切割发射。
更新日期:2020-10-01
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