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An organic Small Molecule as a solid additive in Non-Fullerene organic Solar Cells with Improved Efficiency and Operational Stability

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Chinese Journal of Polymer Science 2023年第2期41卷 194-201页

作者： Yi-Nuo Yang Xiao-Ming Li Shi-Jie Wang Xiao-Peng Duan Yun-Hao Cai Xiao-Bo Sun Dong-Hui Wei Wei Ma Yan-Ming Sun School of Chemistry Beihang UniversityBeijing100191China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an710049China The College of Chemistry and Molecular Engineering Zhengzhou UniversityZhengzhou450001China

The use of additive is an effective approach to optimize the active layer morphology and improve the power conversion efficiency(PCE)of organic solar cells(OSCs).However,residual solvent additives always lead to undesirably compromise the stability of *** this work,an organic small molecule BBT-Cl was designed and used as a novel solid additive to partly replace solvent additive to fabricate highperformance *** synergistic effect of the dual additives on the optical property,morphology and photovoltaic characteristics of the PM6:Y6 based non-fullerene OSCs have been systematically *** introduction of BBT-Cl could effectively enhance the crystallinity of the blend and promote charge extraction and ***,the OSCs processed by the dual additives exhibit a high PCE of 17.73%,which is obviously higher than OSCs with CN additive(16.48%).Meanwhile,BBT-Cl based dual additives treatment has also been successfully introduced into another two non-fullerene OSCs to verify its general ***,20%PCE aging is significantly prolonged from 720 min to 2880 min for the devices proceeded with the dual *** work highlights the great potential of solid additive in the fabrication of efficient OSCs with excellent stability.

关键词： organic solid additive Morphology Dual additives organic solar cells Operational stability

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