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Study of photoluminescence properties of Er3+ ions in SiO2-GeO2 and Al2O3 nanoparticles

机译:SiO2-GeO2和Al2O3纳米粒子中Er3 +离子的光致发光特性研究

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We have used the sol-emulsion-gel method to prepare nanoparticles Of SiO2, SiO2-GeO2 and Al2O3 doped by the same concentration Er3+ ions for comparison. We have compared the luminescent efficiencies of these particles and we found that the luminescence spectra and lifetime of the excited state I-4(13/2) of Er3+ ions are found to be sensitive to the nature of host. A broad emission spectrum of width 58-55 nm peaked at wavelength of 1.5 mum and the decay times of I-4(13/2) --> I-4(15/2) transition are 7.57 and 2.07 ms for 1000 degreesC heat-treated 1.0 mol% Er3+ doped SiO2-GeO2 and Al2O3 nanoparticles, respectively. The analysis suggests that modification of relaxation mechanism is due to the nature of the host. (C) 2004 Elsevier Ltd. All rights reserved.
机译:为了比较,我们已经使用溶胶-乳液-凝胶法制备了由相同浓度的Er3 +离子掺杂的SiO2,SiO2-GeO2和Al2O3纳米粒子。我们比较了这些粒子的发光效率,发现Er3 +离子的激发态I-4(13/2)的发光光谱和寿命对宿主的性质敏感。对于1000摄氏度的热量,宽的58-55 nm的宽发射光谱在1.5微米的波长处达到峰值,并且I-4(13/2)-> I-4(15/2)跃迁的衰减时间分别为7.57和2.07 ms处理的1.0摩尔%Er3 +掺杂的SiO2-GeO2和Al2O3纳米颗粒。分析表明,松弛机制的改变归因于宿主的性质。 (C)2004 Elsevier Ltd.保留所有权利。

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