Tandem organic solar cells with 20.6% efficiency enabled by reduced voltage losses

作     者：Jianqiu Wang Zhong Zheng Pengqing Bi Zhihao Chen Yafei Wang Xiaoyu Liu Shaoqing Zhang Xiaotao Hao Maojie Zhang Yongfang Li Jianhui Hou Jianqiu Wang;Zhong Zheng;Pengqing Bi;Zhihao Chen;Yafei Wang;Xiaoyu Liu;Shaoqing Zhang;Xiaotao Hao;Maojie Zhang;Yongfang Li;Jianhui Hou

作者机构：State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductoroptoelectronics Materials and Devices College of Chemistry Chemical Engineering and Materials Science Soochow University School of Chemistry and Biology Engineering University of Science and Technology Beijing School of Physics State Key Laboratory of Crystal Materials Shandong University University of Chinese Academy of Sciences CAS Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences 

出 版 物：《National Science Review》 (国家科学评论(英文版))

年 卷 期：2023年第10卷第6期

页      面：215-225页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financial support from the Guangdong Major Project of Basic and Applied Basic Research(2019B030302007) the ‘Dual Carbon’ Science and Technology Innovation of Jiangsu Province (Industrial Prospect and Key Technology Research Program)(BE2022021) financial support from the National Natural Science Foundation of China (NSFC)(51773142 and51973146) the Jiangsu Provincial Natural Science Foundation(BK20190099) the Collaborative Innovation Center of Suzhou Nano Science&Technology the Priority Academic Program Development of Jiangsu Higher Education Institutions financial support from the NSFC(51703041) financial support from the Beijing National Laboratory for Molecular Sciences Junior Fellow 

主　　题：organic solar cells power conversion efficiency voltage losses tandem cells ternary strategy 

摘      要：Large voltage losses are the main obstacle for achieving high efficiency in organic solar cells(OSCs).Here we construct ternary OSCs by introducing an asymmetric small molecule acceptor AITC into PBDB-TCl:BTP-eC9 system and demonstrate the effectiveness in simultaneously decreasing energy disorder and non-radiative voltage losses.It is found that the introduction of AITC can modify domain size and increase the degree of crystallinity,which enhances open-circuit voltage and power conversion efficiency(19.1%,certified as 18.9%).Inspiringly,an output efficiency of 20.6% of the constructed tandem OSCs based on PBDB-TCl:AITC:BTP-eC9 ternary active layer output a recorded efficiency of 20.6%(certified as 20.3%),which is the highest value in OSCs field to date.This work demonstrates that decreasing the voltage losses by ternary strategy and constructing of tandem architecture are effective approaches towards improving photovoltaic performance.