含二吲哚并（并二噻吩）结构单元共轭聚合物的合成及其光电性能研究

项目名称： 含二吲哚并（并二噻吩）结构单元共轭聚合物的合成及其光电性能研究

项目编号： No.21464003

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 张卫民

作者单位： 广西民族大学

项目金额： 52万元

中文摘要： 设计并合成一类含新结构单元二吲哚并（并二噻吩）的共轭聚合物半导体材料；研究该类材料的热学、光学和电子学特性；测试这些新材料在有机场效应晶体管和有机太阳能电池器件中的性能;探索材料的光电性能与聚合物分子结构之间的关系，为开发性能良好的有机聚合物光电材料提供理论依据。二吲哚并（并二噻吩）结构单元具有18个π电子和8个P电子形成的稠环大共轭体系，富电子性及平面性的结构特征使其可能成为良好的电子供体，与电子受体（如苯并噻二唑）共聚将获得一类具有较低能带隙、在紫外-可见光区吸收波长范围宽且摩尔吸收系数大适宜用于制作有机太阳能器件的D-A型聚合物材料；与其它富电子单体共聚将获得载流子迁移率高的有机场效应晶体管材料。通过变换二吲哚并（并二噻吩）单体中的烷基取代基及对与其共聚的单体进行匹配优化，筛选出性能优异（载流子迁移率和光电转化率高）、稳定性好、器件易于加工的有机光电功能材料新品种。

中文关键词： 共轭聚合物；有机半导体；有机太阳能电池；光伏性能；光电功能材料

英文摘要： The design, synthesis, characterization of a series of novel polymer semiconductors based on diindolothieno[3,2-b]thiophene (DITT) will be undertaken in this project. The thermal properties, electrochemical properties and optical properties of these polymers prepared will investigated, and their charge transport properties in organic field effect transistors (OFETs) devices and photovoltaic properties in organic solar cells will also be exploided. Diindolothieno[3,2-b]thiophene unit consist of a fused-six-ring core, possessing a large conjugation system with 18π-electrons and 8 p-electrons.The characteristics of planarity and electron-richness make it possible to become a good donor monomer for semiconducting polymers. Low band-gap materials will be obtained when DITT polymerizes with electron-poor monomers (acceptors) such as benzothiodiazole (BT), diketopyrrolopyrrole (DPP), thienopyrrole-dione(TPD) and naphthalenetetracarboxy- lic acid diimide (NDI). These materials will have long-wavelength and strong absorbance in UV-Vis region, possibly exibiting good performance in organic solar cell devices. When DITT polymerizes with other donor monomers, a new type of materials with good carrier mobilities will be obtained, which will be ideal candidates for organic field effect transistors. To understand the correlation between material structure and device performance, different alkyl substituents (C6-C24) on DITT unit and a series co-monomers will be applied for polymer preparation, and these polymers will be measured on devices, to obtained the ideal polymer semiconductors with high mobilities in OFET and excellent power converssion efficiencies (PCEs).

英文关键词： conjugated polymer;organic semiconductor;organic solar cell;photovoltaic properties;OPV material