Calixarenes enabling well-adjusted organic-inorganic interface for inverted organic solar cells with 18.25%efficiency and multifold improved photostability under max power point tracking  

作　　者：Shitong Li Zheng Xiao Juan-Juan Li Zong-Ying Hu Yang Yang Bin Kan Dong-Sheng Guo Xiangjian Wan Zhaoyang Yao Chenxi Li Yongsheng Chen 

机构地区：[1]State Key Laboratory of Elemento-Organic Chemistry,The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials,Renewable Energy Conversion and Storage Center(RECAST),College of Chemistry,Nankai University Tianjin300071,China [2]College of Materials Science and Engineering,Nankai University,Tianjin 300350,China [3]The Institute of Seawater Desalination and Multipurpose Utilization,Ministry of Natural Resources(Tianjin),Tianjin 300192,China

出　　处：《Science China Chemistry》2023年第1期195-201,共7页中国科学（化学英文版）

基　　金：supported by the Ministry of Science and Technology of China(MoST,2019YFA0705900);the National Natural Science Foundation of China(21935007,52025033,51873089);Tianjin city(20JCZDJC00740);111 Project(B12015)。

摘　　要：Compared with organic solar cells(OSCs) adopting conventional architecture,inverted OSCs have offered generally better stability,where Zn O is the most widely used electron transporting layer(ETL) material.For ZnO-based inverted OSCs,a welltuned interface of organic(active layer)-inorganic(Zn O film) with matched surface energy(γS) is critical for both high performance and high stability.In this work,two typical calixarenes,C4A and Bu C4A,were employed as the tuning agents to adjust this organic-inorganic interface for ZnO-based inverted OSCs.As a result,with PM6:L8-BO as the active layer,significantly promoted power conversion efficiencies(PCEs) from 17.14%(for ZnO) to 18.25%(for ZnO/C4A) and 17.80%(for ZnO/Bu C4A) were achieved.Photodynamic studies indicate that the enhanced performance is due to the faster charge extraction process,the suppressed recombination and more ideal internal electric field in ZnO/calixarene-based devices.In addition,wellmatched interface energy and more ordered molecular aggregation in active layer effectively improved photostability and thermal stability for ZnO/calixarene-based devices.These results indicate that calixarenes could act as effective modifying agents of ZnO to improve inverted OSCs’ performance and stability simultaneously,and likely also stimulate calixarenes’ and other macromolecules’ broader studies in other organic electronic devices.

关 键 词：organic solar cell CALIXARENES interface adjustment ZnO modification high performance high stability 

分 类 号：TM914.4[电气工程—电力电子与电力传动]