Copolymer dielectrics with balanced chain-packing density and surface polarity for high-performance flexible organic electronics

Deyang Ji, Tao Li (), Ye Zou, Ming Chu, Ke Zhou, Jinyu Liu, Guofeng Tian, Zhaoyang Zhang, Xu Zhang, Liqiang Li, Dezhen Wu, Huanli Dong, Qian Miao, Harald Fuchs () and Wenping Hu ()
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Deyang Ji: Physikalisches Institut, Westfälische Wilhelms-Universität
Tao Li: Shanghai Jiao Tong University
Ye Zou: Institute of Chemistry, Chinese Academy of Sciences
Ming Chu: The Chinese University of Hong Kong
Ke Zhou: Institute of Chemistry, Chinese Academy of Sciences
Jinyu Liu: Institute of Chemistry, Chinese Academy of Sciences
Guofeng Tian: Beijing University of Chemical Technology
Zhaoyang Zhang: Shanghai Jiao Tong University
Xu Zhang: Shanghai Jiao Tong University
Liqiang Li: Advanced Nano-materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS)
Dezhen Wu: Beijing University of Chemical Technology
Huanli Dong: Institute of Chemistry, Chinese Academy of Sciences
Qian Miao: The Chinese University of Hong Kong
Harald Fuchs: Physikalisches Institut, Westfälische Wilhelms-Universität
Wenping Hu: School of Science, Tianjin University & Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract The ever-increasing demand for flexible electronics calls for the development of low-voltage and high-mobility organic thin-film transistors (OTFTs) that can be integrated into emerging display and labeling technologies. Polymer dielectrics with comprehensive and balanced dielectric properties (i.e., a good balance between their insulating characteristics and compatibility with organic semiconductors) are considered particularly important for this end. Here, we introduce a simple but highly efficient strategy to realize this target by using a new type of copolymer as dielectrics. Benefiting from both high chain packing density guaranteeing dielectric properties and surface polarity optimizing molecular packing of organic semiconductors, this rationally designed copolymer dielectric endows flexible OTFTs with high mobility (5.6 cm2 V−1 s−1), low operating voltage (3 V) and outstanding stability. Further, their applicability in integrated circuits is verified. The excellent device performance shows exciting prospects of this molecular-scale engineered copolymer for the realization of plastic high-performance integrated electronics.

Date: 2018
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DOI: 10.1038/s41467-018-04665-z

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