富勒烯基聚合物太阳电池活性层中分子取向结构及调控研究

项目名称： 富勒烯基聚合物太阳电池活性层中分子取向结构及调控研究

项目编号： No.21373011

项目类型： 面上项目

立项/批准年度： 2014

项目学科： 物理化学

项目作者： 崔光磊

作者单位： 安徽师范大学

项目金额： 40万元

中文摘要： 聚合物太阳电池是新型有机光伏电池，具有易修饰、轻薄、成本低、制作工序简单、可制备柔性器件等特点，但实验室能量转换效率一直较低（<10%），因而吸引了化学、物理、材料等领域的众多研究。新近的研究证实活性层中分子取向对转换效率有重要影响，但如何获得最优化的分子取向尚不明确。为理解这一微结构因素对光电特性的影响机制，本申请拟采用富勒烯衍生物PCBM和ICBA作为电子受体，共轭聚合物P3HT作为给体，用旋涂法制备共混型本体异质结(BHJ)作为器件活性层；通过外部电场、应力场、温度场、磁场等调控给体与受体的结构及BHJ的组装；同时用介电谱方法研究它们在外场作用下分子取向结构的演化；结合形貌表征、结构表征和电导谱研究异质结中的分子相互作用与载流子迁移规律。本项研究将揭示BHJ前驱体及其组装过程中分子取向动力学，为提高有机太阳电池的能量转换效率及稳定性，提供新的实验依据。

中文关键词： 聚合物太阳电池；活性层；富勒烯衍生物；聚3-己基噻吩；介电谱

英文摘要： Polymer solar cell is a new type of photovoltaic cell, which has the advantages of easy modification, light weight, low cost, simple fabrication and capability to be fabricated into flexible devices, however, its present power conversion efficiency (PCE) is low (less than 10%) in lab. So it became the research hots in physical, chemical and material fields. The molecular orientation in the active layer has been confirmed to be an important factor to influence the PCE in the recent report, however, how to obtain the optimized molecular orientation is not clear. To understand the influence mechanism of this microstructure factor on the photoelectric properties, this proposal selects the fullerene derivative PCBM and ICBA as electron acceptors, and selects conjugated polymer P3HT as a donor to prepare blend bulk heterojunction (BHJ) by spin coating as the active layer of device. Through external electric field, stress field, temperature field and magnetic field we are going to modify the structure of donor, acceptor and the assembly of BHJ, and then employ dielectric spectroscopy to study the evolution of molecular orientational structure under the effect of external fields. Combining with morphological and structural characterization and conductivity spectra， we will investigate the interaction of molecules an

英文关键词： Polymer solar cell；Active layer；PCBM；P3HT；Dielectric spectroscopy