基于贵金属-稀土掺杂氧化锌异质结纳米阵列发光薄膜的协同增强机制研究

项目名称： 基于贵金属-稀土掺杂氧化锌异质结纳米阵列发光薄膜的协同增强机制研究

项目编号： No.11474046

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 董斌

作者单位： 大连民族大学

项目金额： 95万元

中文摘要： 针对稀土掺杂氧化物纳米薄膜针发光效率低的瓶颈问题，本项目拟构建贵金属纳米粒子-稀土掺杂氧化锌异质结纳米阵列薄膜结构，利用贵金属表面等离激元共振与异质结电子传递的协同效应增强稀土离子的光致发光效率，从而获得发光效率高、结构稳定的高质量纳米发光薄膜材料。结合单波长光泵浦、双波长光泵浦以及光电转换效率等测试手段，探索上述协同效应对稀土离子发光效率的增强机制，解析其能量传递的变化规律，最终建立协同能量传递的微观动力学模型，为提高氧化物基稀土发光纳米薄膜的发光效率以及其在纳米光电子器件等领域的发展提供新思路。

中文关键词： 稀土发光；表面等离激元；纳米阵列；异质结；协同增强

英文摘要： Application of rare earth doped oxide films is limited by the photoluminescence properties.To solve this problem, we plan to construct the thin film consisted of noble metal nanoparticles and rare earth ions doped zinc oxide nanorods array.By taking the advantage of the synergistic effect between the surface plasmon resonance of noble metal and the charge transfer of heterojunction, the obtained zinc oxide based thin film exhibits remarkablely enhanced photoluminescence with stable structure.Moreover,the synergistic effect is investigated by the single-pump light ,dual-pumplight, and the photovoltaic conversion.The microscopic dynamic model of energy transfer is established.The variation of energy transfer coefficient is studied. The structure of zinc oxide nanorod array is optimized. The overlap between emission spectra of nanorod array and excitation spectra of rare earth doped oxide film is analyzed by selection of pump light with appropriate wavelength. The mechanism of effective energy transfer between nanorod array and rare earth doped zinc oxide film is studied. The study is important for the improvement of photoluminescence of rare earth doped oxide films and the applications of device based on the rare earth doped oxide films.

英文关键词： luminescence of rare earth;surface plasmon;nano array;heterojunction;Synergistic enhancement