Preparation of Nanocomposite-Based High Performance Organic Field Effect Transistor via Solution Floating Method and Mechanical Property Evaluation
- Authors
- Kim, Youn; Kwon, Yeon Ju; Ryu, Seungwan; Lee, Cheol Jin; Lee, Jea Uk
- Issue Date
- 5월-2020
- Publisher
- MDPI
- Keywords
- organic field-effect transistor; nanocomposites; electrochemically exfoliated graphene; solution floating method; film-on-elastomer
- Citation
- POLYMERS, v.12, no.5
- Indexed
- SCIE
SCOPUS
- Journal Title
- POLYMERS
- Volume
- 12
- Number
- 5
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/56207
- DOI
- 10.3390/polym12051046
- ISSN
- 2073-4360
- Abstract
- We demonstrate that using nanocomposite thin films consisting of semiconducting polymer, poly(3-hexylthiophene) (P3HT), and electrochemically exfoliated graphene (EEG) for the active channel layer of organic field-effect transistors (OFETs) improves both device performances and mechanical properties. The nanocomposite film was developed by directly blending P3HT solution with a dispersion of EEG at various weight proportions and simply transferring to an Si/SiO2 substrate by the solution floating method. The OFET based on P3HT/EEG nanocomposite film showed approximately twice higher field-effect mobility of 0.0391 cm(2).V-1.s(-1) and one order of magnitude greater on/off ratio of similar to 10(4) compared with the OFET based on pristine P3HT. We also measured the mechanical properties of P3HT/EEG nanocomposite film via film-on-elastomer methods, which confirms that the P3HT/EEG nanocomposite film exhibited approximately 2.4 times higher modulus (3.29 GPa) than that of the P3HT film (1.38 GPa), while maintaining the good bending flexibility and durability over 10.0% of bending strain and bending cycles (1000 cycles). It was proved that the polymer hybridization technique, which involves adding EEG to a conjugated polymer, is a powerful route for enhancing both device performances and mechanical properties while maintaining the flexible characteristics of OFET devices.
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