非富勒烯电子受体多尺度分子聚集体  

Hierarchical Aggregates of Non-fullerene Electron Acceptors

作　　者：李伟[1] 陈宸 刘丹[1] 王涛[1,2] LI Wei;CHEN Chen;LIU Dan;WANG Tao(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;School of Materials and Microelectronics,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学,材料科学与工程学院,武汉430070 [2]武汉理工大学,材料与微电子学院,武汉430070

出　　处：《高等学校化学学报》2023年第9期97-109,共13页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:52273196,52073221,52203238)资助。

摘　　要：有机太阳能电池的光活性层由p型电子供体和n型电子受体构成.这些有机半导体分子的共轭结构和杂元素使其分子间存在强非共价键作用,易于自组装形成分子聚集体,展现出与单个分子截然不同的光电性能,更决定了太阳能电池光吸收、激子解离和电荷传输等光电转换过程.本文介绍了n型非富勒烯电子受体材料在分子及微纳尺度下的多级聚集体形态,包括强结晶性非富勒烯受体的堆叠、成核、结晶机制与抑制手段,以及弱有序非富勒烯受体无规聚集及有序性提升策略.最后,重点讨论了非富勒烯电子受体纤维化的研究进展及关键技术,并对未来高性能非富勒烯电子受体的结构设计和聚集调控进行了总结和展望.The photoactive layer of organic solar cells is composed of p-type electron donor and n-type electron acceptor.The conjugated structure and hetero-elements within these organic semiconducting molecules make them easy to self-assemble into aggregates,exhibiting distinct optoelectrical properties from those of individual molecules,and further determining the light absorption,exciton dissociation and charge transport processes in their solar cells.In this paper,the aggregation behaviors of n-type non-fullerene electron acceptors(NFAs)at molecular and micro-nano scales were presented,including the stacking,nucleation,crystallization mechanism of the strong-crystalline NFAs as well as their retarding approaches,and the random aggregation as well as ordering strategies for low-order NFAs.Finally,a summary and prospect of the structure design and aggregate control of NFAs were provided,with a special introduction of recent progresses on NFA fibrillization.

关 键 词：有机太阳能电池 非富勒烯电子受体 分子聚集体 光电特性 

分 类 号：O649.5[理学—物理化学]