Difluorobenzoxadiazole-Based Polymer Semiconductors for High-Performance Organic Thin-Film Transistors with Tunable Charge Carrier Polarity
- Authors
- Shi, Shengbin; Wang, Yuxi; Uddin, Mohammad Afsar; Zhou, Xin; Guo, Han; Liao, Qiaogan; Zhu, Xucheng; Cheng, Xing; Woo, Han Young; Guo, Xugang
- Issue Date
- 12월-2017
- Publisher
- WILEY
- Keywords
- ambipolarity; difluorobenzoxadiazole-based polymer semiconductor; electron mobility; hole mobility; organic thin-film transistor
- Citation
- ADVANCED ELECTRONIC MATERIALS, v.3, no.12
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED ELECTRONIC MATERIALS
- Volume
- 3
- Number
- 12
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/81386
- DOI
- 10.1002/aelm.201700100
- ISSN
- 2199-160X
- Abstract
- A series of difluorobenzoxadiazole-based copolymers are synthesized for applications in high-performance organic thin-film transistors. Four pi-spacers with distinct electrical properties, bithiophene, difluorobithiophene, 2-thiophene-2'-thiazole, and bithiazole, are inserted between head-to-head linkage containing bithiophene to promote polymer chain packing. Among the series, polymer containing bithiophene exhibits a unipolar p-channel performance with a substantial hole mobility of 2.92 cm(2) V-1 s(-1), and minor structural modification leads to polymer containing bithiazole showing a remarkable unipolar n-channel performance with an electron mobility of 0.83 cm(2) V-1 s(-1). Through a simple structural modification, such a drastic charge carrier polarity change without sacrificing mobility is elusive in organic thin-film transistor field. Polymer containing hybrid 2-thiophene-2'-thiazole spacer exhibits ambipolarity with encouraging hole/electron mobility of 0.27/0.35 cm(2) V-1 s(-1), and polymer containing difluorobithiophene shows an average hole mobility of 0.53 cm(2) V-1 s(-1). Among the results, p-channel transistors exhibit encouraging device stability. The results demonstrate that difluorobenzoxadiazole is a versatile building block for enabling high-mobility semiconductors with variable charge carrier polarity. X-ray diffraction reveals that all difluorobenzoxadiazole-based polymers have substantial film crystallinity with close pi-stacking and varied polymer chain orientation. The structure-property-device performance correlations from this study offer useful insights for materials innovation in organic thin-film transistors.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Science > Department of Chemistry > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.