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| On the cover: Human civilization has been boosted by the development of chemistry, from fire-using to artificial fuels and chemicals. The advancement of chemistry brings us closer than ever to the nature of microscopic universe. Now, chemists are playing a critical role to develop green energy and intelligent materials. For a bright future of humanity, more and more breakthroughs in chemical technology are needed. |
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| Position: Home > issue > February 28, 2021 Volume 2, Issue 1 |
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| Subtle Side Chain Triggers Unexpected Two-Channel Charge Transport Property Enabling 80% Fill Factors and Efficient Thick-Film Organic Photovoltaics |
Category: Article Download:  PDF  Figure  Endnote |
| Author: Yonghai Li, Lu Yu, Liangliang Chen, Chenyu Han, Huanxiang Jiang, Zitong Liu, Nan Zheng, Jiuxing Wang, Mingliang Sun, Renqiang Yang, Xichang Bao |
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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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