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Nano-crystals precipitation and upconversion luminescence properties in Er~(3+)/Yb~(3+) co-doped fluoride phosphate glass-ceramics

机译:共掺杂Er〜(3 +)/ Yb〜(3+)氟化氟玻璃陶瓷的纳米晶体沉淀和上转换发光性能

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摘要

Er~(3+)/Yb~(3+) co -doped transparent glass-ceramics containing Ca_5(PO_4)_3F nano-crystals were prepared and their upconversion properties were investigated. Transparent glass-ceramics were obtained after heat treatment at the first crystallization temperature, TEM images showed that Ca_5(PO_4)_3F nano-crystals of 10-20 nm in diameter precipitated uniformly in the glass matrix, which is similar to the result of those calculated by Scherrer equation. Comparing with the samples before heat treatment, high efficiency upconversion luminescence of Er~(3+) at 547 nm and 667 nm was observed in the glass-ceramics under 980 nm excitation, and the intensity of red emission showed different tendency to that of green emission after nano-crystals precipitation. The reasons for the highly efficient upconversion luminescence in glass-ceramics were discussed.
机译:制备了含Ca_5(PO_4)_3F纳米晶体的Er〜(3 +)/ Yb〜(3+)共掺杂透明玻璃陶瓷,并研究了其上转换性能。在第一晶化温度下进行热处理后获得透明的玻璃陶瓷,TEM图像显示直径为10-20 nm的Ca_5(PO_4)_3F纳米晶体均匀地沉淀在玻璃基质中,这与计算得出的结果相似通过谢勒方程。与热处理前的样品相比,在980 nm激发下,微晶玻璃中观察到了Er〜(3+)在547 nm和667 nm处的高效上转换发光,红色发射强度与绿色发射强度呈现不同的趋势。纳米晶体沉淀后的发射。讨论了在玻璃陶瓷中高效上转换发光的原因。

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