基于能量传递的宽带太阳光谱调制近红外下转换CaNb2O6发光薄膜研究

项目名称： 基于能量传递的宽带太阳光谱调制近红外下转换CaNb2O6发光薄膜研究

项目编号： No.11474104

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： 王银珍

作者单位： 华南师范大学

项目金额： 95万元

中文摘要： 采用脉冲激光沉积(PLD)技术制备近红外下转换铌酸钙(CaNb2O6)发光薄膜。以能量传递为基础，选择具有宽带强吸收特性的4f-5d跃迁的稀土Ce3+、Eu2+ 和d-d跃迁的过渡金属离子Cr3+，增强对紫外光和蓝光的吸收，最终通过Yb3+、Nd3+离子获得将太阳光谱中的近紫外-蓝绿光高效转换成硅太阳能电池可利用的近红外光。应用低温高分辨荧光和时间分辨光谱等手段，系统地研究掺杂离子在CaNb2O6薄膜中的电子能级结构、荧光动力学等光学性能，揭示其薄膜成膜过程、形貌、厚度对下转换发光效率的影响及下转换机理，获得用于提高硅基太阳能电池效率的稳定、透明、高效的宽带光谱调制近红外下转换CaNb2O6薄膜，研究并优化CaNb2O6薄膜的近红外下转换方式、效率与机制，探索研究其在硅太阳电池的光电性能，为未来提高硅电池光电效率提高实验依据。

中文关键词： 能量传递；CaNb2O6薄膜；下转换/量子剪裁；太阳能电池

英文摘要： Solar cell that can convert sunlight to electricity based on the photovoltaic effect is a very important device, which can utilize solar energy reasonably. How to enhance the photoelectric conversion efficiency of the silicon solar cell is one of the focus issues presently. Therefore, a down-conversion layer containing luminescent materials doped with rare earth ions or transition metal ions is proposed to be placed at the front of solar cell to increase the photoelectric conversion efficiency of the silicon solar cells.Near-infrared down-conversion CaNb2O6 films are prepared by pulsed laser deposition (PLD) technique. The broadband strong absorption characteristics 4f-5d transition of rare earth Ce3 +, Eu2 +, and d-d transition transition metal ions Cr3+ ware selected to enhance the absorption of UV and blue light, and finally a near-ultraviolet - blue-green light is converted into efficient near infrared lightsilicon can be obtained through the Yb3 +, Nd3 + ions based on energy transfer . The optical properties of ion-doped electron energy level structure, fluorescence dynamics in CaNb2O6 film are studied by low temperature and high-resolution time-resolved fluorescence spectroscopy and other means.Study the relation between the film forming process, morphology, thickness and down-conversion luminescence effects and mechanism of the down-conversion, stable for improving the efficiency of the silicon solar cell, a transparent, efficient broadband near-infrared spectral. Stable,transparent, efficient broadband NIR CaNb2O6 films are get to improve the efficiency of silicon photovoltaic cells.Explore the application possibility of NIR quantum cutting in solar cells.

英文关键词： Energy transfer;CaNb2O6 films;Downconversion;Sollar cells