journal article·2021-08-25

High-Performance Simple Nonfused Ring Electron Acceptors with Diphenylamino Flanking Groups

Xiaodong Wang, Hao Lu, Jiadong Zhou, Xiaoyun Xu, Cai’e Zhang, Hao Huang, Jinsheng Song, Yahui Liu, Xinjun Xu, Zengqi Xie, Zheng Tang, Zhishan Bo

ACS Applied Materials & Interfaces· Volume 13· Issue 33
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Abstract

Four simple nonfused ring electron acceptors (H–2F, CH3–2F, OCH3–2F, and SCH3–2F) were designed and synthesized. The use of diphenylamine derivatives as the flanking group for the construction of nonfused ring electron acceptors can improve solubility, avoid the formation of oversized aggregates, and enhance the intramolecular charge-transfer effect to extend absorption spectra. The substituent group at the diphenylamine unit has a great impact on the absorption and energy level of acceptors, electron mobility and morphology of blend films. Unlike the other three acceptors, CH3–2F can form ordered molecular stacking and a face-on orientation in the donor/acceptor blend film. A single-crystal analysis demonstrates that CH3–2F can form a two-dimensional electron transport network. Among these four acceptors, CH3–2F-based organic solar cells provide the highest PCE of 12.28%. Our work has demonstrated that triarylamine is a helpful construction unit for low-cost and high efficiency nonfused ring electron acceptors.
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Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Perovskite Materials and Applications · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China

Institute of Polymer Optoelectronic Materials and Devices and State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, P. R. China

Center for Advanced Low-dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China

Engineering Research Center for Nanomaterials, Henan University, Kaifeng 475004, China

College of Textiles & Clothing, Qingdao University, Qingdao 266071, China

Funding

National Natural Science Foundation of China

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