Pentacene Thin Film Transistors with Various Polymer Gate Insulators



Kim, Jae-Kyoung;Kim, Jung-Min;Yoon, Tae-Sik;Lee, Hyun-Ho;Jeon, D.;Kim, Yong-Sang

  • 발행 : 2009.03.01


Organic thin film transistors with a pentacene active layer and various polymer gate insulators were fabricated and their performances were investigated. Characteristics of pentacene thin film transistors on different polymer substrates were investigated using an atomic force microscope (AFM) and x-ray diffraction (XRD). The pentacene thin films were deposited by thermal evaporation on the gate insulators of various polymers. Hexamethyldisilazane (HMDS), polyvinyl acetate (PVA) and polymethyl methacrylate (PMMA) were fabricated as the gate insulator where a pentacene layer was deposited at 40, 55, 70, 85, 100 oC. Pentacene thin films on PMMA showed the largest grain size and least trap concentration. In addition, pentacene TFTs of top-contact geometry are compared with PMMA and $SiO_2$ as gate insulators, respectively. We also fabricated pentacene TFT with Poly (3, 4-ethylenedioxythiophene)-Polysturene Sulfonate (PEDOT:PSS) electrode by inkjet printing method. The physical and electrical characteristics of each gate insulator were tested and analyzed by AFM and I-V measurement. It was found that the performance of TFT was mainly determined by morphology of pentacene rather than the physical or chemical structure of the polymer gate insulator


Organic Thin-Film Transistors;Pentacene;PMMA;Ink-Jet printing


  1. C. D. Sheraw, L. Zhou, J. R. Huang, D. J. Gundlach, T. N. Jackson, M. G. Kane, I. Hill, 'Organic thinfilm transistor-driven polymer-dispersed liquid crystal displays on flexible polymeric substrates', Appl. Phys. Lett., vol. 80, no. 6, pp.1088-1090, 2002
  2. C. D. Dimitrakopoulos, P.R.L. Malenfant, 'Organic Thin Film Transistors for Large Area Electronics', Advanced materials, vol. 14, no 2, pp. 99-117, 2002<99::AID-ADMA99>3.0.CO;2-9
  3. N. Karl, 'Charge carrier transport in organic semiconductors', Synthetic metals, vol. 133/134, pp. 649-657, 2003
  4. G. Horowitz, 'Organic Field-Effect Transistors', Advanced materials, pp. 365-377, 1998
  5. H. Klauk, D. J. Gundlach, M. Bonse, K.Chung-Chen, T. N.Jackson, 'A reduced complexity process for organic thin film transistors', Applied physics letters, v,76, no.13 pp. 1692-1694, 2000
  6. T.W Kelley, D.V Muyres, P.F Baude, T.P. Smith, T.D. Jones, 'High Perforrnance Organic Thin Film Transistors', Proc. Mater. Res. Soc. Symp. Proc, vol.771, pp. 169-180, 2003
  7. S. Y. Yang, K. Shin, C. E. Park, 'The Effect of GateDielectric Surface Energy on Pentacene Morphology and Organic Field-Effect Transistor Characteristics', Advanced functional materials, vol.15, no,11, pp. 1806-1814, 2005
  8. D. J. Gundlach, Y. Y. Lin, T. N. Jackson, S. F. Nelson, D. G. Schlom, ' Pentacene organic thin-film transistors-molecular ordering and mobility', IEEE electron device Lett. a publication of the IEEE Electron Devices Society, vol.18, no.3, pp. 87-89, 1997
  9. O. Marinov, M.J. Deen, B. lniguez, 'Charge transport in organic and polymer thin-film transistors: recent issues', IEE proceedings: Circuits, devices and systems, vol.152, no.3, pp. 189-209, 2005
  10. C. D. Dimitrakopoulos, D. J. Mascaro, 'Organic thin-film transistors: A review of recent advances', IBM journal of research and development, vol.45, no.1, pp. 11-28, 2001
  11. C. K. Song, M. K. Jung, B. W. Koo, 'Pentacene Thin Film Transistor Improved by Therrnal Annealing', Journal of the Korean Physical Society, vol.39, pp.s271-s274, 2001
  12. R. Ye, M. Baba, K. Suzuki, Y. Ohishi, K. Mori, 'Effect of Therrnal Annealing on Morphology of Pentacene Thin Films', Jpn. J. Appl. Phys, vol.42, no.7A=no.579, pp. 4473-4475, 2003
  13. J. Puigdol1ers, C. Voz, I. Martin, 'Pentacene thinfilm transistors on polymeric gate dielectric: device fabrication and electrical characterization', Journal of Non-Crystalline Solids, voI.338/340 pp. 617-621, 2004

피인용 문헌

  1. 1. Photosensing Properties of Pentacene OFETs Based on a Novel PMMA Copolymer Gate Dielectric vol.11, pp.6, 2015, doi:10.5370/JEET.2009.4.1.118
  2. 2. Controlling of photoresponse properties of pentacene thin film phototransistors by dielectric layer thickness and channel widths vol.179, 2013, doi:10.5370/JEET.2009.4.1.118
  3. 3. Enhanced electrical and photosensing properties of pentacene organic thin-film phototransistors by modifying the gate dielectric thickness vol.87, pp.11, 2010, doi:10.5370/JEET.2009.4.1.118
  4. 4. Flexible organic thin-film transistors using single-walled carbon nanotubes as an activated channel vol.518, pp.22, 2010, doi:10.5370/JEET.2009.4.1.118
  5. 5. Photoresponse of pentacene-based transistors vol.211, pp.2, 2014, doi:10.5370/JEET.2009.4.1.118
  6. 6. Flexible pentacene organic field-effect phototransistor vol.161, pp.5-6, 2011, doi:10.5370/JEET.2009.4.1.118
  7. 7. Polymer binder effects on the electrical characteristics of 6, 13-bis(triisopropylsilylethynyl)-pentacene thin-film transistors in different solvents vol.518, pp.22, 2010, doi:10.5370/JEET.2009.4.1.118
  8. 8. Dynamic Mechanical and Thermal Kinetics of Polyvinyl Acetate Type Emulsions from Vinyl Acetate, N -hydroxymethyl Acrylamide, and Montmorillonite vol.33, pp.1, 2014, doi:10.5370/JEET.2009.4.1.118
  9. 9. Effects of P3HT concentration on the performance of organic field effect transistors vol.7, pp.1, 2011, doi:10.5370/JEET.2009.4.1.118