上转换纳米颗粒@多孔单晶TiO2的构建及在钙钛矿基太阳能电池中的作用机制

项目名称： 上转换纳米颗粒@多孔单晶TiO2的构建及在钙钛矿基太阳能电池中的作用机制

项目编号： No.21471056

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： 朱以华

作者单位： 华东理工大学

项目金额： 85万元

中文摘要： 针对太阳能电池应用推广亟待解决的提高光电转换效率的热点和难点，从解决光吸收、光生电子和空穴对的分离及载流子的迁移入手，设计和构建基于上转换纳米颗粒@多孔单晶TiO2新材料，将多孔单晶半导体材料的高比表面积和高载流子迁移性质与宽光谱吸收的上转换磷光材料的优势耦合于一体，研究基于胶体晶体自组装技术实现该材料制备新方法，探讨其在钙钛矿基太阳能电池中的作用机理。阐明PVA凝胶化对自组装胶体晶体进行微观结构的控制作用，阐明功能化的上转换纳米颗粒@多孔单晶TiO2材料的形成机理，建立该新材料与钙钛矿CH3NH3PbI3杂化后其结构与其电性质、光学性质之间的内在联系并阐明其作用机制。得到集上转换纳米颗粒与多孔单晶TiO2材料优势于一体高光电转换性能的钙钛矿基太阳能电池，为推进太阳能电池实用化提供有价值的设计信息。

中文关键词： 纳米材料；太阳能电池；晶体结构；无机功能材料；构效关系

英文摘要： For improving the photoelectric conversion efficiency of solar cells to promote the application of some hot and difficult problems in this area, the new composites of upconversion nanoparticles@porous single crystal TiO2 will be designed and prepared based on incorporation high surface area and high carrier mobility transistor of porous single crystal semiconductor with wide spectral absorption of upconversion phosphors, to solve the problem of the light absorption, the separation of photogenerated electrons and holes, migration of charge carriers in solar cells. This project will investigate the new preparation method that based on self-assemble of colloidal crystals, and discuss its mechanism of action in perovskite-based solar cells. The project also clarifies the assistance effect of PVA gel in self-assemble of colloidal crystals on controlling the formation of microstructure and the impact mechanism of this functionalized upconversion nanoparticles@porous single crystal TiO2 material. This project will also establish the connection between the structure of this hybrid material with its electrical properties and optical properties, then investigate its action mechanism. This method will obtain efficient perovskite-based solar cells that incorporate the advantages of both upconversion nanoparticles and porous single crystal TiO2, providing valuable design information to promote the practical application of solar cells.

英文关键词： nanomaterials;solar cells;crystal structure;inorganic functional materials;structure-effect relationship