| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Improved Performance of Fluorinated Copper Phthalocyanine Thin Film Transistors Using Para-hexaphenyl as the Inducing Layer |
| MA Feng1, WANG Shi-Rong1**, LI Xiang-Gao1, YAN Dong-Hang2
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1School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072
2State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
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| Cite this article: |
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MA Feng, WANG Shi-Rong, LI Xiang-Gao et al 2011 Chin. Phys. Lett. 28 118501 |
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Abstract We demonstrate n-type organic thin film transistors (OTFTs) employing copper hexadecafluorophthalocyanine (CuPcF16) as the active layer and para−hexaphenyl (p−6p) as the inducing layer. Compared with the CuPcF16−based OTFTs without the p−6p inducing layer, the performance of the CuPcF16/p−6p OTFTs is greatly improved. The charge carrier field-effect mobility μ, on−off current ratio Ion/Ioff and threshold voltage VT of the CuPcF16/p−6p OTFTs are 0.07 cm2/V⋅s, 1.61×105 and 6.28 V, respectively, approaching the level of a single crystal device. The improved performance is attributed to the introduction of p−6p to form a highly oriented and continuous film of CuPcF16 with the molecular π–π stack direction parallel to the substrate.
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| Keywords:
85.30.Tv
81.05.Hd
73.61.Ga
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Received: 03 May 2011
Published: 30 October 2011
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