利用不同成膜技术优点构筑高效非富勒烯聚合物太阳能电池研究

Fullerene-free polymer solar cells (PSCs) with distinctive advantages of tunable absorption, flexibility, low cost and large-area solution processing, have attracted great attention in both the academic and industrial fields and its performance has been greatly improved. Fullerene-free PSCs are mainly processed by a spin coating method, which is totally ill-suited to a large-area roll-to-roll (R2R) process. In this application, based on the solvent-soluble donor polymer/fullerene-free acceptor, interfacial polymer and high-conductive polymer, we will take full advantage of R2R-compatible doctor-blading and spray coating techniques and study the complex self-assembly regulation during the doctor-blading process and the nanostructure morphology control in the spray coating process, etc. We focus on the electrical optimization by self-assembly lamination and the optical absorption enhancement by nanostructure scattering. The effective absorption, nongeminate recombination and exction separation rates will be calculated by the transfer matrix method and optoelectronic numerical calculation method. The aim of this work is to make a solid foundation for high-performance R2R-compatible fullerene-free PSCs in device physics. In short, technology breakthroughs will be realized and the basic rules for the manufacturing process will be under our control via this project. We will own poineering and influential intelligence properties in both China and the world.

非富勒烯聚合物太阳能电池具有可调节吸收、柔性、低成本和可大面积制备等优势，近两年受到学术和业界广泛关注并发展迅速。目前，非富勒烯聚合物太阳能电池主要采用旋涂技术制备，与卷对卷工业化生产完全不匹配。本申请基于聚合物给体/非富勒烯受体、界面聚合物和高导聚合物等，充分利用与卷对卷技术匹配的刮膜和喷涂两种技术优点，研究活性溶液在刮膜过程中的分层自组装调控和喷涂过程中纳米微结构形貌控制等基本科学问题，阐明和揭示自组装对器件电学性能影响及纳米微结构对活性层光吸收增强作用，并结合传输矩阵法和数值计算法分析刮膜喷涂非富勒烯聚合物太阳能电池的吸收、双分子复合率及激子分离效率等，为实现高性能非富勒烯聚合物太阳能电池产业化奠定器件物理基础。本项目综合利用与工业化生产匹配的刮膜技术和喷涂技术，争取在非富勒烯聚合物太阳能电池产业化方面掌握基本规律和实现技术突破,获得自主产权，取得国内首创、国际有影响力的科研成果。

聚合物太阳能电池具有环保、柔性、溶液加工及低成本等优势，近年受到学术和业界广泛关注并发展迅速。但其器件性能与大面积制备技术仍然具有很大的提升空间。本项目采用有机溶剂可溶性聚合物、界面聚合物、量子点等材料，研究其在喷涂、印刷制备过程中的蒸发过程和薄膜微纳形貌控制等基本科学问题，阐明和揭示微米级光散射对活性层光吸收增强作用和纳米级给受体相分离对光生激子的分离影响，并结合光电数值计算和有限元模拟仿真解释实验现象，对旋涂、喷涂和刮膜器件从实验和理论计算进行了对比研究，为实现与产业化印刷技术匹配的高性能聚合物太阳能电池奠定物理基础。本项在印刷高效聚合物太阳能电池方面掌握基本规律和实现技术突破，取得国内首创、国际有影响力的科研成果，多项工作被网站引用和报道。OSCs领域共发表SCI学术论文20篇，其中高被引和热点论文3篇，包括Joule，Advanced Energy Materials，Nano Energy等国际顶级期刊。本项目还对量子点太阳能电池、量子点发光、有机发光、电致变色等领域进行了研究，也取得丰硕的科研成果，共发表SCI论文25篇，包括Advanced Materials，Advanced Functional Materials，Nano Energy等国际顶级期刊。协助讨论工作发表SCI论文3篇。在该项目资助下，合计发表48篇SCI论文。申请和授权发明专利7项，授权实用新型专利1项。合著英文学术专著2部。