Enhancing Organic Solar Cells Efficiency by Using Self-assembly Monomolecular Layer with Improved Hydrophilicity and Hole Transport Capability

Xing Yan; Yetai Cheng; Qi Liang; Zhengdong Wei; Xingyue Cui; Yueheng Liu; Shuyue Song; Chenyi Zhang; Haishuo Guo; Huanxiang Jiang; Hao Lu; Zhishan Bo; Yahui Liu

doi:10.1002/cjoc.70241

Chinese Journal of Chemistry ›› 2025, Vol. 43 ›› Issue (23) :3252 -3258. DOI: 10.1002/cjoc.70241

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Enhancing Organic Solar Cells Efficiency by Using Self-assembly Monomolecular Layer with Improved Hydrophilicity and Hole Transport Capability

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Abstract

This study deliberately designs and synthesizes three HTMs: m-PhACz, p-PhACz, and p-DPAPCz, incorporating carbazole or diphenylamine groups linked through a benzene ring and functionalized with phosphonic acid groups. Notably, m-PhACz, featuring a carbazole unit and meta-substituted phosphonic acid, exhibits superior hole transport mobility and hydrophilicity, fostering strong intermolecular interaction with indium tin oxide. Consequently, m-PhACz-based devices achieve an outstanding power conversion efficiency of 19.44%, which is much higher than p-PhACz (18.30%) and p-DPAPCz (17.38%) based ones. Our work sets a new benchmark for high-performance OSC fabrication.

Keywords

Self-assembled monolayer / Hole transport material / Hydrophilicity / Organic solar cells / Interface modification / Charge transport

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Xing Yan, Yetai Cheng, Qi Liang, Zhengdong Wei, Xingyue Cui, Yueheng Liu, Shuyue Song, Chenyi Zhang, Haishuo Guo, Huanxiang Jiang, Hao Lu, Zhishan Bo, Yahui Liu. Enhancing Organic Solar Cells Efficiency by Using Self-assembly Monomolecular Layer with Improved Hydrophilicity and Hole Transport Capability. Chinese Journal of Chemistry, 2025, 43(23): 3252-3258 DOI:10.1002/cjoc.70241