银纳米晶掺杂玻璃基片对Er^(3+)/Yb^(3+)共掺碲酸盐薄膜的荧光增强及其数值模拟  

Luminescence Enhancement of Er^(3+)/Yb^(3+) Co-doped Tellurite Films on Ag-nanoparticles-doped Glass Substrates and Numerical Simulating

作　　者：孙天拓[1] 林健[1,2] 魏恒勇[1] 冯昭彬[1] 

机构地区：[1]同济大学材料科学与工程学院,上海200092 [2]同济大学先进土木工程材料教育部重点实验室,上海200092

出　　处：《无机材料学报》2011年第11期1215-1220,共6页Journal of Inorganic Materials

基　　金：上海市科学技术委员会纳米专项基金(0852nm06500)~~

摘　　要：采用电场辅助热扩散工艺制备了银纳米晶掺杂玻璃基片,用非水解溶胶—凝胶法在基片上制备了Er3+/Yb3+共掺碲酸盐薄膜,研究结果表明,玻璃基片中的银纳米颗粒对Er3+/Yb3+共掺碲酸盐薄膜具有明显的荧光增强效果.利用菲克第一、第二定律、欧姆定律、泊松方程对电场辅助热扩散过程进行了数值模拟,计算了玻璃内银的浓度分布.结果表明:玻璃内银纳米颗粒的总量越大、近玻璃表面银纳米颗粒的浓度和粒度越大、银耗尽层的厚度越小,荧光增强效果越好.此外,不仅近玻璃表面的银纳米颗粒可以产生荧光增强效应,而且远离表面的银纳米颗粒也有荧光增强效应.The glass substrates doped with Ag nanoparticles （NPs） were fabricated by the field-assisted thermal diffusion （FATD） process. The Er^3＋/Yb^3＋ co-doped tellurite thin films were deposited on these substrates via nonhydrolytic Sol-Gel method. It was found that the luminescence of the thin film was significantly enhanced by the Ag NPs embedded in the glass substrate. The distribution of Ag in the substrate after FATD process was calculated by numerical simulating on base of Fick＇s first and second law, Ohm＇s law and Poisson equation. The enhancement factor increased with the increase of concentration and diameter of Ag NPs near the glass surface. When the total amount of NPs decreased and the thickness of space-charge layer increased, the enhancement effect became weak. In addition, besides the Ag NPs near the glass surface the Ag NPs far from the glass surface could also contribute to the luminescence enhancement.

关 键 词：银纳米晶 碲酸盐薄膜 电场辅助热扩散 表面等离子体增强荧光 数值模拟 

分 类 号：TQ174[化学工程—陶瓷工业]