Stable Radical TEMPO Terminated Perylene Bisimide(PBI) Based Small Molecule as Cathode Interlayer for Efficient Organic Solar Cells

作     者：ZHANG Ziwei XIA Dongdong XIE Qian ZHAO Chaowei FANG Jie WU Yonggang LI Weiwei ZHANG Ziwei;XIA Dongdong;XIE Qian;ZHAO Chaowei;FANG Jie;WU Yonggang;LI Weiwei

作者机构：College of Chemistry and Environmental ScienceHebei UniversityBaoding071002P.R.China Institute of Applied ChemistryJiangxi Academy of SciencesNanchang330096P.R.China Beijing Advanced Innovation Center for Soft Matter Science and Engineering and State Key Laboratory of Organic-Inorganic CompositesBeijing University of Chemical TechnologyBeijing100029P.R.China 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2023年第39卷第2期

页      面：213-218页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：National Natural Science Foundation of China(Nos.92163128,52073016,52163018) the Open Project of State Key Laboratory of Organic-Inorganic Composites,China(No.oic-202201006) the Fund of the Academy of Sciences of Jiangxi Province,China(Nos.2022YJC2017,2021YSBG22034,2021YSBG22033) 

主　　题：Tetramethylpiperidine nitrogen oxide(TEMPO) Perylene bisimide Cathode interlayer Organic solar cell Power conversion efficiency 

摘      要：By combining stable radical tetramethylpiperidine nitrogen oxide(TEMPO)as end groups and perylene bisimide(PBI)as the core,a small molecular cathode interlayer(CIL)(PBI-TEMPO)was *** physical-chemical characterizations indicate that PBI-TEMPO can form smooth film,owns low unoccupied molecular orbital(LUMO)level of−3.67 eV and can reduce the work function of silver *** using PBI-TEMPO as CIL in non-fullerene organic solar cells(OSCs),the PM6:BTP-4Cl based OSCs delivered high power conversion efficiencies(PCEs)up to 17.37%,higher than those using commercial PDINO CIL with PCEs of 16.95%.Further device characterizations indicate that PBI-TEMPO can facilitate more efficient exciton dissociation and reduce charge recombination,resulting in enhanced current density and fill ***,PBI-TEMPO displays higher thermal stability than PDINO in *** PBI-TEMPO and PDINO solution were heated at 150℃ for 2 h and then were used as CIL in solar cells,PBI-TEMPO-based OSCs provided a PCE of 15%,while PDINO-based OSCs only showed a PCE of 10%.These results demonstrate that incorporating TEMPO into conjugated materials is a useful strategy to create new organic semiconductors for application in OSCs.