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Position: Home > issue > February 28, 2021 Volume 2, Issue 1
Subtle Side Chain Triggers Unexpected Two-Channel Charge Transport Property Enabling 80% Fill Factors and Efficient Thick-Film Organic Photovoltaics
Category: Article
Author: Yonghai Li, Lu Yu, Liangliang Chen, Chenyu Han, Huanxiang Jiang, Zitong Liu, Nan Zheng, Jiuxing Wang, Mingliang Sun, Renqiang Yang, Xichang Bao

44.jpg

Graphical abstract


To clearly show how important the impact of side chains on organic solar cells (OSCs) is, we designed three acceptors IDIC-CxPh (x = 4, 5, or 6) via subtle side-chain regulation. Despite this small change, significant distinctions were detected. IDIC-C4Ph devices achieve an optimal efficiency of 13.94% under thermal annealing, but thermal-assistant solvent-vapor annealing hugely suppresses the efficiencies to 10%. However, the C6Ph side chain endows extremely disordered stacking orientations, generating moderate efficiencies of ~12.50%.





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