| Autor: |
Kang, S. J., Yi, Y., Kim, C. Y., Cho, K., Seo, J. H., Noh, M., Jeong, K., Yoo, K.-H., Whang, C. N. |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 12/5/2005, Vol. 87 Issue 23, p233502, 3p, 1 Diagram, 3 Graphs |
| Abstrakt: |
We fabricated ambipolar organic thin-film transistors (OTFTs) using C60 and pentacene. The electronic structure of the interface was investigated by using ultraviolet photoelectron spectroscopy and x-ray photoelectron spectroscopy. The magnitude of the interface dipole and the band bendings at the interface was determined, and the complete energy level diagram for C60 on pentacene (C60/pentacene) was obtained. The lowered band offsets, due to the enhanced charge redistribution in C60/pentacene relative to pentacene on C60, are favorable for the ambipolar OTFTs. The measured field-effect mobilities were 0.017 cm2/V s and 0.007 cm2/V s for the p-channel and the n-channel operations, respectively. The threshold voltages were -2 V for the p channel and 15.6 V for the n channel, comparable to those of unipolar OTFTs using C60 or pentacene. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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