Research Article

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2018, 11(4): 1917–1927

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https://doi.org/10.1007/s12274-017-1809-7

Fullerene/cobalt porphyrin charge-transfer cocrystals: Excellent thermal stability and high mobility

Shushu Zheng1,3, Junwen Zhong4, Wakana Matsuda2, Peng Jin5, Muqing Chen1, Takeshi Akasaka1, Kazuhito Tsukagoshi3 (*), Shu Seki2 (*), Jun Zhou4, and Xing Lu1 (*)

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1 State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
2 Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyoto 6158510, Japan
3 International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan
4 Wuhan National Laboratory for Optoelectronics and College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
5 School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China

Keywords: organic semiconductor, fullerene/porphyrin, thermal stability, mobility, charge-transfer
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ABSTRACT Although organic semiconductors with high mobility and thermal stability are particularly desirable for practical applications, facile methods for their development still remains a big challenge. In this work, a charge-transfer cocrystal based on fullerene (C70)/cobalt porphyrin supramolecular architecture was prepared by a solution-processable co-assembly strategy. This supramolecular architecture showed hole mobility as high as 4.21 cm2·V−1·s−1, and a relatively high mobility of 0.02 cm2·V−1·s−1 even after thermal treatment at 1,000 °C. Further studies confirmed the occurrence of charge-transfer from 5,10,15,20- tetrakis(4-methoxyphenyl)porphyrinato cobalt(II) (CoTMPP) to C70 and the paramagnetic character within the supramolecular system. These factors were found to be responsible for the aforementioned superior performances. Thus, a novel organic semiconductor has been reported in this work, which can be potentially used for next generation electronic devices. Furthermore, it has been demonstrated that charge-transfer co-crystallization is a powerful strategy for the rational design and construction of a broad class of new multifunctional organic co-crystalline materials.
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Fullerene/cobalt porphyrin charge-transfer cocrystals: Excellent thermal stability and high mobility. Nano Res. 2018, 11(4): 1917–1927 https://doi.org/10.1007/s12274-017-1809-7

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