Organic Thin Film Transistors based Oligothiophine Derivatives using DZ-Dihexyl(quarter- and sexi-)Thiophene

Authors: Jae-Hong Kwon, Myung-Ho Chung, Tae-Yeon Oh, Hyeon-Seok Bae, Byeong-Kwon Ju

Abstract:

End-substitution of quarterthiophene and sexithiophene with hexyl groups leads to highly soluble conjugated oligomers,DZ-dihexylquarterthiophene (DH-4T) and DZ-dihexylsexithiophene (DH-6T). We have characterized these oligomers for optical and electrical properties. We fabricated an organic thin film transistor (OTFT) using the above two air-stable p-type organic semiconductor materials. We obtained a stable characteristic curve. The field effect mobility, Pwas calculated to be 3.2910-4 cm2/Vs for DH-6T based OTFT; while the DH-4T based OTFT had 1.8810-5 cm2/Vs.KeywordsOrganic thin film transistor, DZ-dihexylquarterthiophene, DZ-dihexylsexithiophene.

Keywords: Organic thin film transistor, DZ-dihexylquarterthiophene, DZ-dihexylsexithiophene.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1076490

References:

[1] J. -H. Kwon, J. -H. Seo, S. -I. Shin, K. -H. Kim, D. H. Choi, I. B. Kang, H. Kang, and B. -K. Ju, A 6,13-bis(Triisopropylsilylethynyl) Pentacene Thin-Film Transistor Using a Spun-On Inorganic Gate-Dielectric, Electron Devices, IEEE Transactions on, vol.55, no.2, pp.500-505, Jan., 2008.
[2] J. -H, Kwon, S. H. Lee, and B. -K Ju, Screen-printed multi-crystalline silicon solar cells with porous silicon antireflective layer formed by electrochemical etching, J. Appl. Phys., vol.101, no.9, p.104515, May, 2007.
[3] J. -H. Kwon, S. -I. Shin, K. -H. Kim , M. -J. Cho, K. -N. Kim, D. -H. Choi, and B. -K. Ju, Organic thin film transistors using 6,13-bis(triisopropyl-silylethynyl)-pentacene embedded into polymer binders, Appl. Phys. Lett., vol.94, No.1, p.013506, Jan., 2009.
[4] M. Austin and S. Chou, Fabrication of 70 nm channel length polymer organic thin-film transistors using nanoimprint lithography, Appl. Phys. Lett., vol.81, no.23, p.4431, Dec., 2002.
[5] J. -H. Kwon, J. -H. Seo, H. Kang, D. H. Choi, and B. -K. Ju, p-type semiconducting DZ-dihexylsexithiophene for an organic thin film transistor, J. Appl. Phys., vol.101, no.6, p.064502, Mar., 2007.
[6] A. Facchetti, M. Yoon, C. L. Stern, G. R. Hutchison, M. Ratner and T. Marks, Building Blocks for N-Type Molecular and Polymeric Electronics. Perfluoroalkyl- versus Alkyl-Functionalized Oligothiophenes (nTs; n = 26). Systematic Synthesis, Spectroscopy, Electrochemistry, and Solid-State Organization, J. Am. Chem. Soc.,vol.126, no.41, pp.13480-13501, Sep., 2004.
[7] F. Garnier, A. Yassar, R. Hajlaoui, G. Horowitz, F. Deloffre, B. Servet, S. Ries, and P. Alnot, Molecular engineering of organic semiconductors: design of self-assembly properties in conjugated thiophene oligomers, J.Am. Chem. Soc., vol.115, no.19, pp.8716-8721, Sep., 1993.
[8] F. Garnier, R. Hajlaoui, A. E. Kassmi, G. Horowitz, L. Laigre, W. Porzio, M. Armanini, and F. Provasoli, Dihexylquaterthiophene, A Two-Dimensional Liquid Crystal-like Organic Semiconductor with High Transport Properties, Chem. Mater., vol.10, no.11, pp.3334-3339, Oct., 1998.
[9] H. E. Katz, A. Dodabalapur, L. Torsi and D. Elder, Precursor Synthesis, Coupling, and TFT Evaluation of End-Substituted Thiophene Hexamers, Chem. Mater., vol.7, no.12, pp. 2238-2240, Dec., 1995.
[10] A. Facchetti, Y. Deng, A. Wang, Y. Koide, H. Sirringhaus, T. Marks and R. Friend, Tuning the Semiconducting Properties of Sexithiophene by DZ-Substitution DZ-Diperfluorohexylsexithiophene: The First n-Type Sexithiophene for Thin-Film Transistors, Angew. Chem. Int. Ed., vol.39, no.24, pp.4547-4551, Dec., 2000.
[11] D.-H. Lee, G.-W. Hyung and Y.-K. Kim, The Influence of a Polymeric Adhesion Layer on Gate Insulators in Organic Thin-Film-Transistors, J.Korean Phys. Soc., vol.49, no.3, pp.1111-1116, Sep., 2006.
[12] J. H. Lee, S. H. Kim, J. B. Koo, J. W. Lim, S. C. Lim, G. H. Kim, S. J. Yun, K. S. Suh, C. H. Ku and J. Jang, Isolation Effect on Organic Thin Film Transistors for Low Hysteresis Characteristics, J. Korean Phys. Soc.,vol.49, no.3, pp.1148-1151, Sep., 2006.