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首页> 外文期刊>Science and technology of advanced materials >High luminescence quantum efficiency of Eu3+-doped SnO2–SiO2 glasses due to excitation energy transfer from nano-sized SnO2 crystals
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High luminescence quantum efficiency of Eu3+-doped SnO2–SiO2 glasses due to excitation energy transfer from nano-sized SnO2 crystals

机译:纳米级SnO2晶体的激发能转移,掺杂Eu3 +的SnO2-SiO2玻璃具有很高的发光量子效率

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The strong Eu3+ photoluminescence in xSnO2–(100?x)SiO2 derived by the sol–gel method was reported. It was shown that Eu3+ ions were embedded in SnO2 nanocrystals (tetragonal, rutile) surrounded by a SiO2 glass matrix. Time-resolved photoluminescence spectra and excitation spectra revealed that Eu3+ ions could receive excitation energy from electron–hole pairs in SnO2 semiconductor nanocrystal, whose band-gap energy shifted to the higher energy side due to the quantum size effect, and was tuned to an optimum frequency for energy transfer to Eu3+ ions. Absolute quantum luminescence efficiencies were found to be 60.5 (internal) and 26.7% (external).
机译:报道了通过溶胶-凝胶法得到的xSnO 2 –(100?x)SiO 2 中强的Eu 3 + 光致发光。结果表明,Eu 3 + 离子嵌入被SiO 2 玻璃基质包围的SnO 2 纳米晶体(四方,金红石)中。时间分辨的光致发光光谱和激发光谱表明,Eu 3 + 离子可以从SnO 2 半导体纳米晶体的电子-空穴对接收激发能,其带隙能转移到由于量子尺寸效应,它的能量较高,并且被调整到一个最佳的频率以将能量转移到Eu 3 + 离子上。发现绝对量子发光效率为60.5(内部)和26.7%(外部)。

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