| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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High Performance Polymer Field-Effect Transistors Based on Thermally Crosslinked Poly(3-hexylthiophene) |
| JIANG Chun-Xia1,2, YANG Xiao-Yan1,2, ZHAO Kai1,2, WU Xiao-Ming1,2, YANG Li-Ying1,2, CHENG Xiao-Man1,2, WEI Jun3, YIN Shou-Gen1,2**
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1Key Laboratory of Display Materials and Photoelectric Devices (Ministry of Education), Tianjin University of Technology, Tianjin 300384
2Institute of Material Physics, and Tianjin Key Laboratory for Photoelectric Materials and Devices, Tianjin University of Technology, Tianjin 300384
3Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore
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| Cite this article: |
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JIANG Chun-Xia, YANG Xiao-Yan, ZHAO Kai et al 2011 Chin. Phys. Lett. 28 118502 |
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Abstract The performance of polymer field-effect transistors is improved by thermal crosslinking of poly(3-hexylthiophene), using ditert butyl peroxide as the crosslinker. The device performance depends on the crosslinker concentration significantly. We obtain an optimal on/off ratio of 105 and the saturate field−effect mobility of 0.34 cm2V−1s−1, by using a suitable ratios of ditert butyl peroxide, 0.5 wt% of poly(3-hexylthiophene). The microstructure images show that the crosslinked poly(3-hexylthiophene) active layers simultaneously possess appropriate crystallinity and smooth morphology. Moreover, crosslinking of poly(3-hexylthiophene) prevents the transistors from large threshold voltage shifts under ambient bias-stressing, showing an advantage in encouraging device environmental and operating stability.
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| Keywords:
85.30.Tv
72.80.Le
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Received: 13 June 2011
Published: 30 October 2011
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| PACS: |
85.30.Tv
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(Field effect devices)
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72.80.Le
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(Polymers; organic compounds (including organic semiconductors))
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