Skip to main content
SpringerLink
Log in

Photocurrent studies of sexythiophene-based OFETs

  • Published:
Applied Physics A Aims and scope Submit manuscript

Abstract

Photocurrent (PC) spectroscopy is proposed as a reliable tool in the investigation of the transport properties of organic thin-film transistors (OFETs).

We have applied PC analyses to the study of the electronic density of states (DOS) distribution of the OFETs with crystalline-mixed films of two derivatives of a conjugated molecule [α-sexithiophene (6T), and its alkylated analogue α,ω-dihexylsexithiophene (DH6T)] as the active semiconductor. We have investigated the modifications in the DOS distribution associated to variations in the carrier density in the OFET channel and we have detected the formation of deep electrically active states in the below-band-gap region, associated to polaron states induced by a prolonged exposure of the device to atmosphere. A clear correlation between the PC results and the electrical characteristics of the corresponding FET devices has been observed.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. G. Horowitz, M. Hajlaoui, R. Hajlaoui, J. Appl. Phys. 87, 4456 (2000)

    Article  ADS  Google Scholar 

  2. M. Vissenberg, M. Matters, Phys. Rev. B 57, 12964 (1998)

    Article  ADS  Google Scholar 

  3. H. Houili, E. Tutis, I. Batistic, L. Zuppiroli, J. Appl. Phys. 100, 33702 (2006)

    Article  Google Scholar 

  4. R. Bube, Photoconductivity of Solids (Wiley, New York, 1960)

    MATH  Google Scholar 

  5. Y. Ahn, J. Dunning, J. Park, Nano Lett. 5, 1367 (2005)

    Article  ADS  Google Scholar 

  6. A. Cavallini, L. Polenta, M. Rossi, T. Richter, M. Marso, R. Meijers, R. Calarco, H. Luth, Nano Lett. 6, 1548 (2006)

    Article  ADS  Google Scholar 

  7. B. Fraboni, A. Castaldini, T. Cesca, A. Gasparotto, L. Tarricone, J. Appl. Phys. 102, 073711 (2007)

    Article  ADS  Google Scholar 

  8. T. Jentzsch, H. Juepner, K. Brzezinka, A. Lau, Thin Solid Films 315, 273 (1998)

    Article  ADS  Google Scholar 

  9. P. Cosseddu, J.-O. Vogel, B. Fraboni, J.P. Rabe, N. Koch, A. Bonfiglio, Adv. Mat. 20, 1 (2008)

    Article  Google Scholar 

  10. S. Duhm, H. Glowatzki, R.L. Johnson, J.P. Rabe, N. Koch, Appl. Phys. Lett. 88, 203109 (2006)

    Article  ADS  Google Scholar 

  11. V. Arkhipov, P. Heremans, E. Emelianova, H. Bassler, Phys. Rev. B 71, 45214 (2005)

    Article  ADS  Google Scholar 

  12. B. Fraboni, R. DiPietro, A. Cavallini, P. Cosseddu, A. Bonfiglio, J.O. Vogel, J.P. Rabe, N. Koch, submitted for publication

  13. W. Pasveer, J. Cottaar, C. Tanase, R. Coehoorn, P. Bobbert, P. Blom, D. de Leeuw, M. Michels, Phys. Rev. Lett. 94, 206601 (2005)

    Article  ADS  Google Scholar 

  14. V. Arkhipov, P. Heremans, E. Emelianova, G. Adriaenssens, H. Bassler, Appl. Phys. Lett. 82, 3245 (2003)

    Article  ADS  Google Scholar 

  15. J. Zhou, Y. Zhou, J. Zhao, C. Wu, X. Ding, X. Hou, Phys. Rev. B 75, 153201 (2007)

    Article  ADS  Google Scholar 

  16. P.A. Lane, X. Wei, Z. Vardeny, J. Poplawski, E. Ehrenfreund, M. Ibrahim, A. Frank, Chem. Phys. 210, 229 (1996)

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Dipartimento di Fisica, Università di Bologna, viale Berti Pichat 6/2, 40127, Bologna, Italy

    B. Fraboni, R. DiPietro & A. Cavallini

  2. Dipartimento di Ingegneria Elettrica ed Elettronica, Università di Cagliari, piazza d’Armi, 09123, Cagliari, Italy

    P. Cosseddu & A. Bonfiglio

  3. CNR-INFM S3, via Campi 213/a, 41100, Modena, Italy

    P. Cosseddu & A. Bonfiglio

  4. Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, 12489, Berlin, Germany

    J. O. Vogel

Authors
  1. B. Fraboni
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. R. DiPietro
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. A. Cavallini
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. P. Cosseddu
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. A. Bonfiglio
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. J. O. Vogel
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to B. Fraboni.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Fraboni, B., DiPietro, R., Cavallini, A. et al. Photocurrent studies of sexythiophene-based OFETs. Appl. Phys. A 95, 37–41 (2009). https://doi.org/10.1007/s00339-008-4998-9

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00339-008-4998-9

PACS

Search

Navigation