Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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New p-type Organic Semiconducting Materials for Organic Transistor

유기트랜지스터용 p-type 유기반도체 개발

  • Published : 2006.06.01
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Abstract

We have synthesized a new p-type polymer, poly(9,9'-n-dioctylfluorene-alt-phenoxazine) (PFPO), via the palladium catalyzed coupling reaction. The number average molecular weight ($M_n$) of PFPO was found to be 23,000. PFPO dissolves in common organic solvents such as chloroform and toluene. The UV-visible absorption maximum of the PFPO thin film is clearly blue-shifted with respect to that of F8T2, poly-(9,9'-n-dioctylfluorene-alt-bithiophene). The introduction of the phenoxazine moiety into the polymer system results in better field-effect transistor (FET) performance than that of F8T2. A solution processed PFPO TFT device with a top contact geometry was found to exhibit a hole mobility of $2.7{\times}10^{-4}cm^2/Vs$ and a low threshold voltage of -2 V with high on/off ratio(${\sim}10^4$).

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References

  1. A. R. Brown, C. P. Jarret, D. M. de Leeuw, and M. Matters, 'Field-effect transistors made from solution-processed organic semiconductors', Synth. Met., Vol. 88, No.1, p. 33, 1997
  2. F. Garnier, R. Hajlaoui, A. Yassar, and P. Srivastava, 'All-polymer field-effect transistor realized by printing techniques', Science, Vol. 256, p. 1684, 1994 https://doi.org/10.1126/science.256.5064.1684
  3. Y. Y. Lin, D. J. Gundlach, S. F. Nelson, and T. N. Jackson, 'Pentacene-based organic thin film transistor', IEEE transaction on electron device, Vol. 44, No.8, p. 1325, 1997 https://doi.org/10.1109/16.605476
  4. H. E. A. Huitema, G. H. Gelinck, J. B. P. H. van der Putten, K. E. Kuijk, C. M. Hart, E. Cantatore, P. T. Herwig, A. J. J. M. van Breemen, and D. M. de Leeuw, 'Plastic transistor in active-matrix displays', Nature, Vol. 414, p. 599, 2001 https://doi.org/10.1038/414599a
  5. Z. Bao, A. Dodabalapur, and A. J. Lovinger, 'Soluble and processable regioregular poly (3-hexylthiophene) for thin film field-effect transistor applications with high mobility', Appl. Phys. Lett., Vol. 69, p. 4108, 1996 https://doi.org/10.1063/1.117834
  6. J. Veres, S. D. Ogier, S. W. Leeming, D. C. Cupertino, and S. M. Khaffaf, 'Low-k insulator as the choice of dielectrics in organic field-effect transistor', Adv. Funct. Mater., Vol. 13, No.3, p. 199, 2003 https://doi.org/10.1002/adfm.200390030
  7. D. H. Hwang, S. K. Kim, M. J. Park, J. H. Lee, B. W. Koo, I. N. Kang, S. H. Kim, and T. Zyung, 'Conjugated polymers based on phenothiazine and fluorene in light-emtting diodes and field effect transistor', Chem. Mater., Vol. 16, p. 1298, 2004 https://doi.org/10.1021/cm035264+
  8. E. Lee, B. J. Jung, and H. K. Shim, 'Synthesis and characterization of a new light-emitting fluorene-thieno[3,2-b] thiophene-based conjugated copolymer', Macromolecules, Vol. 36, p. 4288, 2003 https://doi.org/10.1021/ma034168r