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Binary All-polymer Solar Cells with a Perhalogenated-Thiophene-Based Solid Additive Surpass 18 % Efficiency
Feng, Wanying1,2,3,4; Chen, Tianqi1; Li, Yulu5; Duan, Tainan5; Jiang, Xue5; Zhong, Cheng6; Zhang, Yunxin1; Yu, Jifa7; Lu, Guanghao7; Wan, Xiangjian2,3,4
2024-01-17
摘要Morphological control of all-polymer blends is quintessential yet challenging in fabricating high-performance organic solar cells. Recently, solid additives (SAs) have been approved to be capable in tuning the morphology of polymer: small-molecule blends improving the performance and stability of devices. Herein, three perhalogenated thiophenes, which are 3,4-dibromo-2,5-diiodothiophene (SA-T1), 2,5-dibromo-3,4-diiodothiophene (SA-T2), and 2,3-dibromo-4,5-diiodothiophene (SA-T3), were adopted as SAs to optimize the performance of all-polymer organic solar cells (APSCs). For the blend of PM6 and PY-IT, benefitting from the intermolecular interactions between perhalogenated thiophenes and polymers, the molecular packing properties could be finely regulated after introducing these SAs. In situ UV/Vis measurement revealed that these SAs could assist morphological character evolution in the all-polymer blend, leading to their optimal morphologies. Compared to the as-cast device of PM6 : PY-IT, all SA-treated binary devices displayed enhanced power conversion efficiencies of 17.4-18.3 % with obviously elevated short-circuit current densities and fill factors. To our knowledge, the PCE of 18.3 % for SA-T1-treated binary ranks the highest among all binary APSCs to date. Meanwhile, the universality of SA-T1 in other all-polymer blends is demonstrated with unanimously improved device performance. This work provide a new pathway in realizing high-performance APSCs. Three isomeric perhalogenated thiophenes were reported as solid additives to optimize the morphological characters of all-polymer organic solar cells (APSCs). Among them, power conversion efficiency over 18 % and long-term thermal stability (T90 lifetime is 550 hours) were realized for SA-T1-treated binary APSC, providing a possibility for obtaining high-performance APSCs.image
关键词All-Polymer Solar Cells Halogenated Thiophene High-Efficiency Morphology Solid Additives
DOI10.1002/anie.202316698
发表期刊ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
ISSN1433-7851
页码12
通讯作者Duan, Tainan(tnduan@cigit.ac.cn) ; Kan, Bin(kanbin04@nankai.edu.cn) ; Chen, Yongsheng(yschen99@nankai.edu.cn)
收录类别SCI
WOS记录号WOS:001143316400001
语种英语