一类含芳香稠环结构的聚合物太阳电池材料的合成及其性能研究

聚合物太阳能电池由于在低成本、柔性、可大面积制备等方面的显著优点，受到了人们的广泛关注，目前已成为研究热点之一。文献报道的聚合物太阳能电池能量转换效率已突破10%。聚合物材料的发展是整个聚合物太阳能电池效率突破的关键。构筑芳香稠环体系是目前聚合物电池材料发展的一个重要方向之一。本项目研究拟以开发新型芳香大稠环体系为出发点，设计合成一系列新型含芳香大稠环的高效聚合物太阳能电池材料。以苯并噻二唑为核心，通过对其并环化、功能化或者开环修饰等方法手段，设计合成双噻吩并苯并噻二唑、双噻吩并喹喔啉和苯并（苯并噻二唑）等芳香大稠环体系，以它们作为受体单元，选择合适的强/弱给体单元，制备一系列芳香大稠环类聚合物太阳电池材料。通过对其性能研究，结合量子化学理论计算等辅助手段，优化材料结构设计，实现高效聚合物太阳能电池，丰富人们对结构与性能关系的认识，促进我国聚合物太阳能电池材料的发展。

Polymer solar cells have attracted much more attention because of their advantages on lost cost, flexible and large-area fabrication et al. The power conversion efficiency of polymer solar cell has reached more than 10%, recently, in literature reports. The design and development of new polymer structures is the key of the breakthrough on polymer solar cell efficiency. The structures based on polycyclic aromatic hydrocarbons is receiving more and more investigation and has played an important role in the pursuit of higher efficiency. In this project, we will start to design and develop the novel polycyclic aromatic hydrocarbons and their corresponding conjugated polymers, and will develop a series of high efficient polymer solar cell materials. We will use the benzothiadiazole as the core to design and synthesize the bithiophenebenzothiadiazole, dithiophene-based quinoxaline and benzobenzothiadiazole units via the cyclation, functionalization and other methods to modify benzothidiazole unit. We will synthesize the polymers usinge these new developed polyclcylic aromatic hydrocarbon units as the electron-deficient acceptor. We will investigate their optical. photovoltaic properties, and will optimize the chemical structure with the assistant of quantum chemical calculations in aiming to develop high efficient polymer solar cells. This will improve our understanding the relationship between structure and performance, and beneficial to the development of polymer solar cells in China.