Browse > Article
http://dx.doi.org/10.4313/JKEM.2006.19.6.558

New p-type Organic Semiconducting Materials for Organic Transistor  

Kang In-Nam (가톨릭대학교 화학과)
Lee Ji-Hoon (충주대학교 고분자공학과)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.19, no.6, 2006 , pp. 558-562 More about this Journal
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(${\sim}10^4$).
Keywords
Organic transistor; Polymer semiconductor; Polyfluorene; Phenoxazine;
Citations & Related Records
연도 인용수 순위
  • Reference
1 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   DOI   ScienceOn
2 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   DOI   ScienceOn
3 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   DOI   ScienceOn
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   DOI   ScienceOn
5 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
6 F. Garnier, R. Hajlaoui, A. Yassar, and P. Srivastava, 'All-polymer field-effect transistor realized by printing techniques', Science, Vol. 256, p. 1684, 1994   DOI
7 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   DOI   ScienceOn
8 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   DOI   ScienceOn