基于非稠环电子受体的有机太阳能电池材料与器件

Research Progress of Materials and Devices for Organic Photovoltaics Based on Non-Fused Ring Electron Acceptors

近年来基于稠环电子受体的有机太阳能电池发展迅速,然而稠环受体分子结构的复杂性导致了较高的合成成本和较低的收率,限制了其商业化应用。非稠环小分子受体因其采用C-C单键连接,因具有分子结构简单、结构多样性、合成成本低等优点获得广泛关注。本文从材料设计角度入手,围绕非稠环电子受体的发展历程,简要讨论结构调控对材料基本性质、聚集态结构、分子堆积、活性层形貌及相应光伏性质的影响规律;重点介绍关于完全非稠环受体材料的结构-性质之间的关系。最后从材料设计、器件优化、器件光伏性能、器件稳定性方面对非稠环受体材料的发展做出展望。

Fused-ring electron acceptors(FREAs)based organic solar cells(OSCs)have achieved rapidly development in recent years.However,the complexity of molecular structure of fused-ring electron acceptors leads to high synthesis costs and low yields,limiting their further commercial applications.Non-fused-ring small molecule acceptors have attracted widespread attention due to their simple moleclar structure,structural diversity,and low synthesis cost due to their application of C—C single bonds.In this review,from the perspective of materials design,focusing on the development of non-fused-ring electron acceptors(NFREAs),this paper will briefly discuss the influence of structural regulation on the basic properties,aggregation structure,molecular packing,active layer morphology and the corresponding photovoltaic performances.Further elucidating the structure-property relationships of non-fused-ring acceptor materials.Finally,we will prospect the development and challenge of non-fused-ring acceptors based OSCs from the point view of material design,device optimization,device photovoltaic performance,and device stability.