Polythiophene solar cells processed from non-halogenated solvent with 15.68%efficiency  

作　　者：Xiaoxin Tan Youle Li Xiyue Yuan Seoyoung Kim Yue Zhang Changduk Yang Fei Huang Yong Cao Chunhui Duan 

机构地区：[1]Institute of Polymer Optoelectronic Materials and Devices,State Key Laboratory of Luminescent Materials and Devices,South China University of Technology,Guangzhou,510640,China [2]School of Energy and Chemical Engineering,Perovtronics Research Center,Low Dimensional Carbon Materials Center,Ulsan National Institute of Science and Technology(UNIST),Ulsan,44919,Republic of Korea

出　　处：《Science China Chemistry》2023年第8期2347-2353,共7页中国科学（化学英文版）

基　　金：supported by the Guangdong Basic and Applied Basic Research Foundation(2022B1515120008);the Guangdong Innovative and Entrepreneurial Research Team Program(2019ZT08L075);the National Natural Science Foundation of China(22275058,U20A6002);supported by the National Research Foundation of the Republic of Korea(NRF)grant funded by the Republic of Korea Government(MSIP)(2021R1A2C3004202)。

摘　　要：Polythiophenes(PTs)are prospective polymer donors for large-scale manufacturing and industrialization owing to their simple structures and low synthetic cost.However,the fabrication of PT solar cells depends on highly toxic chlorinated solvents,and less research has been done on the use of more environmentally friendly non-halogenated solvents.Herein,highly efficient PT solar cells based on top-performance polythiophene,P5TCN-F25,processed from a non-halogenated solvent are reported by delicate aggregation control.A power conversion efficiency of up to 15.68%was achieved by depositing the active layer from a hot o-xylene solution,which is the record efficiency of non-halogenated processed PT solar cells up to date.The appropriate solution temperature is beneficial to the formation of ordered polymer stacking and desirable phase separation size,which thereby contributes to enhanced charge transfer efficiency,more balanced hole/electron mobility,and reduced trap-assisted recombination.These results provide valuable implications for improving the efficiency of PT solar cells via environmentallyfriendly processing.

关 键 词：POLYTHIOPHENES organic solar cells high-efficiency non-halogenated solvent aggregation control 

分 类 号：TQ317[化学工程—高聚物工业] TM914.4[电气工程—电力电子与电力传动]