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

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.

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。

本项目在基于贵金属-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中取得显著成果。通过构建贵金属-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氧化锌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，成功获得发光效率高、结构稳定的高质量稀土纳米发光薄膜材料。研究不同波长激发光对贵金属-稀土掺杂氧化锌异质结纳米阵列薄膜材料的有效激发，以及氧化锌纳米阵列之间空间间隙对贵金属表面等离激元共振激发的能量传递对稀土离子发光的增强作用。采用模拟计算对贵金属表面氧化锌等离激元共振局域电磁场增强进行研究，揭示贵金属-稀土掺杂氧化锌异质结纳米阵列对稀土离子的协同增强机制，为提高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。.在基金支持下，已接收发表科技论文23篇，都被SCI收录，其中一区论文9篇，影响因子大于10的5篇；申请国家发明专利4项,已授权2项。获辽宁省自然科学二等奖 1项。课题实施期间，组织承办第七届全国掺杂纳米材料发光性质学术会议，参加学术会议20余人次，做邀请及口头报告10余次。