有机-无机“桥接”型复合材料的构筑及其光电转换性能和机制研究

项目名称： 有机-无机“桥接”型复合材料的构筑及其光电转换性能和机制研究

项目编号： No.21271152

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 高远浩

作者单位： 许昌学院

项目金额： 78万元

中文摘要： 有机-无机复合光伏纳米材料因有机组分和无机组分在物理性质和化学键上的显著差异常常存在有机/无机界面严重失配问题，阻碍光生载流子的传输，降低光电转化效率。本项目拟用功能性双硫端基过渡金属配合物M(S)2L键合硫族半导体纳米晶，旨在以端基S原子和中心配位金属M做桥梁，"桥"接硫族半导体纳米晶和功能性有机分子L，在分子水平上构筑有机/无机桥接单元，从根本上解决界面失配问题。研究内容包括：（1）在金属基底或导电玻璃上通过溶剂热法、电化学沉积法等原位制备硫族半导体纳米晶薄膜；（2）选择合适的配位条件实现双硫端基配合物M(S)2L与硫族半导体纳米晶的配位键合；（3）建立界面结构模型，研究该类复合材料的光电转换特性和机制。本项目的开展将为有机-无机复合材料的光电转换机制研究提供新的界面结构模型，对于揭示光电转换过程的本质和深入理解光生载流子的界面分离、输运、复合等物理化学过程提供新思路和技术支撑。

中文关键词： 有机-无机复合光伏纳米材料；双硫端基配合物；无机半导体纳米晶；光生载流子；界面结构

英文摘要： Due to the differences of physical properties and chemical bond between the organic and inorganic compounds, for organic-inorganic hybrid photovoltaic nanomaterials, there often exist the problem of organic/inorganic interface mismatch, which hinder the photogenerated charge carrier transmission, reducing photoelectric conversion efficiency. The project intends to use a functional sulfur-terminal transition metal complex M(S)2L to combine chalcogenide semiconductor nanocrystals together.In the M(S)2L complex, the two unsaturated coordinated sulfur atoms could endow M(S)2L significant function for as a "complex" ligand for the surface modification of inorganic nanomaterials. Particularly, for the M(S)2L complex, the terminal S atom and the center metal M could be expected as a "bridging" to connect various chalcogenide semiconductor nanocrystals and organic component L together at the molecular level, which would result in a novel organic-inorganic hybrid material with the "bridging" unit as the organic/inorganic interface at molecular level. Therefore, the "bridging" unit could significantly improve the organic/inorganic interface match. The study includes: (1) in situ preparation of chalcogenide semiconductor nanocrystals on the metal foil or conductive glass by solvothermal, electrochemical deposition,etc.(2)

英文关键词： organic–inorganic hybrid；sulfur-terminal transition metal complex；inorganic nanocrystal；photogenerated charge carriers；interface structure