Interfacial phenomena affecting charge transport in small molecule organic thin-film transistors

Antonio Facchetti, Choongik Kim, Myung Han Yoon, Tobin J Marks

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Organic semiconductors exhibiting p-, n-type, or ambipolar majority charge transport are grown on six different bilayer dielectric structures consisting of various spin-coated polymers / HMDS on 300 nm SiO2/p*-Si, and are characterized by AFM, SEM, and WAXRD, followed by field-effect transistor (FET) electrical characterization. It is observed that in case of air-sensitive n-type semiconductors, dielectric surface modifications induce large variations in the corresponding OTFT performance parameters although the film morphologies and microstructures remain similar. In marked contrast, the device performance of air-stable n-type and p-type semiconductors is not significantly affected by the same dielectric surface modifications. This study provides key information on the chemical origin of the charge trapping sites at the FET dielectric-semiconductor interface. In parallel, bottom-contact FETs of n-type oligothiophenes were investigated by a combination of microscopy/electrical measurements and new insights for the poor electron injection efficiency from the Au contacts are presented.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings
Pages258-263
Number of pages6
Volume965
Publication statusPublished - 2006
Event2006 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 27 2006Dec 1 2006

Other

Other2006 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period11/27/0612/1/06

Fingerprint

Thin film transistors
Charge transfer
Field effect transistors
Molecules
Semiconductor materials
Surface treatment
Charge trapping
Electron injection
Semiconducting organic compounds
Air
Microscopic examination
Polymers
Microstructure
Scanning electron microscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Facchetti, A., Kim, C., Yoon, M. H., & Marks, T. J. (2006). Interfacial phenomena affecting charge transport in small molecule organic thin-film transistors. In Materials Research Society Symposium Proceedings (Vol. 965, pp. 258-263)

Interfacial phenomena affecting charge transport in small molecule organic thin-film transistors. / Facchetti, Antonio; Kim, Choongik; Yoon, Myung Han; Marks, Tobin J.

Materials Research Society Symposium Proceedings. Vol. 965 2006. p. 258-263.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Facchetti, A, Kim, C, Yoon, MH & Marks, TJ 2006, Interfacial phenomena affecting charge transport in small molecule organic thin-film transistors. in Materials Research Society Symposium Proceedings. vol. 965, pp. 258-263, 2006 MRS Fall Meeting, Boston, MA, United States, 11/27/06.
Facchetti A, Kim C, Yoon MH, Marks TJ. Interfacial phenomena affecting charge transport in small molecule organic thin-film transistors. In Materials Research Society Symposium Proceedings. Vol. 965. 2006. p. 258-263
Facchetti, Antonio ; Kim, Choongik ; Yoon, Myung Han ; Marks, Tobin J. / Interfacial phenomena affecting charge transport in small molecule organic thin-film transistors. Materials Research Society Symposium Proceedings. Vol. 965 2006. pp. 258-263
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