Energy level diagrams of optimized ambipolar organic thin film transistors used pentacene and C60

S. J. Kang, Y. Yi, C. Y. Kim, M. Noh, K. Jeong, K. H. Yoo, C. N. Whang

Research output: Contribution to journalConference article

Abstract

The interface electronic structure of pentacene and C60 layer was investigated in detail by using ultraviolet photoelectron spectroscopy and x-ray photoelectron spectroscopy. The magnitudes of measured interface dipole were 0.11 eV and 0.07 eV for the C60 deposited on pentacene (C 60/pentacene) and the pentacene deposited on C60 (pentacene/C60), respectively. The obtained C 1s spectra on pentacene/C60 and C60/pentacene indicate no significant chemical bonds existing at the interface. The offsets of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) at the C60-pentacene interface were 1.29 eV and 0.89 eV for C 60/pentacene/Au while it were 1.5 eV and 1.1 eV for pentacene/C 60/Au. This resulted in that the HOMO and LUMO offset depend on the deposition order of the organic layers. We fabricated the ambipolar OTFTs used the favorable structure of pentacene and C60, and obtained the field effect mobilities were 0.017 cm2/Vs and 0.007 cm2/Vs for p-channel and n-channel operations.

Original languageEnglish
Article number594019
Pages (from-to)1-10
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5940
DOIs
Publication statusPublished - 2005 Dec 1

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Thin-film Transistor
Molecular orbitals
Thin film transistors
Energy Levels
Electron energy levels
molecular orbitals
transistors
Diagram
energy levels
diagrams
thin films
Lowest
photoelectron spectroscopy
Ultraviolet photoelectron spectroscopy
X-ray Spectroscopy
Chemical bonds
ultraviolet spectroscopy
Electronic Structure
Photoelectron spectroscopy
chemical bonds

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

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title = "Energy level diagrams of optimized ambipolar organic thin film transistors used pentacene and C60",
abstract = "The interface electronic structure of pentacene and C60 layer was investigated in detail by using ultraviolet photoelectron spectroscopy and x-ray photoelectron spectroscopy. The magnitudes of measured interface dipole were 0.11 eV and 0.07 eV for the C60 deposited on pentacene (C 60/pentacene) and the pentacene deposited on C60 (pentacene/C60), respectively. The obtained C 1s spectra on pentacene/C60 and C60/pentacene indicate no significant chemical bonds existing at the interface. The offsets of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) at the C60-pentacene interface were 1.29 eV and 0.89 eV for C 60/pentacene/Au while it were 1.5 eV and 1.1 eV for pentacene/C 60/Au. This resulted in that the HOMO and LUMO offset depend on the deposition order of the organic layers. We fabricated the ambipolar OTFTs used the favorable structure of pentacene and C60, and obtained the field effect mobilities were 0.017 cm2/Vs and 0.007 cm2/Vs for p-channel and n-channel operations.",
author = "Kang, {S. J.} and Y. Yi and Kim, {C. Y.} and M. Noh and K. Jeong and Yoo, {K. H.} and Whang, {C. N.}",
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Energy level diagrams of optimized ambipolar organic thin film transistors used pentacene and C60 . / Kang, S. J.; Yi, Y.; Kim, C. Y.; Noh, M.; Jeong, K.; Yoo, K. H.; Whang, C. N.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 5940, 594019, 01.12.2005, p. 1-10.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Energy level diagrams of optimized ambipolar organic thin film transistors used pentacene and C60

AU - Kang, S. J.

AU - Yi, Y.

AU - Kim, C. Y.

AU - Noh, M.

AU - Jeong, K.

AU - Yoo, K. H.

AU - Whang, C. N.

PY - 2005/12/1

Y1 - 2005/12/1

N2 - The interface electronic structure of pentacene and C60 layer was investigated in detail by using ultraviolet photoelectron spectroscopy and x-ray photoelectron spectroscopy. The magnitudes of measured interface dipole were 0.11 eV and 0.07 eV for the C60 deposited on pentacene (C 60/pentacene) and the pentacene deposited on C60 (pentacene/C60), respectively. The obtained C 1s spectra on pentacene/C60 and C60/pentacene indicate no significant chemical bonds existing at the interface. The offsets of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) at the C60-pentacene interface were 1.29 eV and 0.89 eV for C 60/pentacene/Au while it were 1.5 eV and 1.1 eV for pentacene/C 60/Au. This resulted in that the HOMO and LUMO offset depend on the deposition order of the organic layers. We fabricated the ambipolar OTFTs used the favorable structure of pentacene and C60, and obtained the field effect mobilities were 0.017 cm2/Vs and 0.007 cm2/Vs for p-channel and n-channel operations.

AB - The interface electronic structure of pentacene and C60 layer was investigated in detail by using ultraviolet photoelectron spectroscopy and x-ray photoelectron spectroscopy. The magnitudes of measured interface dipole were 0.11 eV and 0.07 eV for the C60 deposited on pentacene (C 60/pentacene) and the pentacene deposited on C60 (pentacene/C60), respectively. The obtained C 1s spectra on pentacene/C60 and C60/pentacene indicate no significant chemical bonds existing at the interface. The offsets of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) at the C60-pentacene interface were 1.29 eV and 0.89 eV for C 60/pentacene/Au while it were 1.5 eV and 1.1 eV for pentacene/C 60/Au. This resulted in that the HOMO and LUMO offset depend on the deposition order of the organic layers. We fabricated the ambipolar OTFTs used the favorable structure of pentacene and C60, and obtained the field effect mobilities were 0.017 cm2/Vs and 0.007 cm2/Vs for p-channel and n-channel operations.

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