The electronic structure and energy level alignment of porphyrin/metal interfaces studied by ultraviolet photoelectron spectroscopy

S. Narioka; H. Ishii; D. Yoshimura; M. Sei; Y. Ouchi; K. Seki; S. Hasegawa; T. Miyazaki; Y. Harima; K. Yamashita

doi:10.1063/1.114370

The electronic structure and energy level alignment of porphyrin/metal interfaces studied by ultraviolet photoelectron spectroscopy

S. Narioka, H. Ishii, D. Yoshimura, M. Sei, Y. Ouchi, K. Seki, S. Hasegawa, T. Miyazaki, Y. Harima, K. Yamashita

Research output: Contribution to journal › Article

124 Citations (Scopus)

Abstract

Electronic structures of 5, 10, 15, 20-zinctetraphenylporphyrin (ZnTPP)/metal (Au, Ag, Al, Mg) interfaces prepared in ultrahigh vacuum were investigated by ultraviolet photoelectron spectroscopy (UPS). We found that the electronic energy levels of ZnTPP align to the vacuum level of substrate metal, with a constant energy shift of vacuum levels across the interface. These findings cannot be explained by the simple models assuming vacuum level alignment at the interface. We also found that sample exposure to oxygen induces energy level shift in close relation with change of substrate work function at oxygen exposure.

Original language	English
Number of pages	1
Journal	Applied Physics Letters
Volume	67
DOIs	https://doi.org/10.1063/1.114370
Publication status	Published - Dec 1 1995
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.114370

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Narioka, S., Ishii, H., Yoshimura, D., Sei, M., Ouchi, Y., Seki, K., Hasegawa, S., Miyazaki, T., Harima, Y., & Yamashita, K. (1995). The electronic structure and energy level alignment of porphyrin/metal interfaces studied by ultraviolet photoelectron spectroscopy. Applied Physics Letters, 67. https://doi.org/10.1063/1.114370

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abstract = "Electronic structures of 5, 10, 15, 20-zinctetraphenylporphyrin (ZnTPP)/metal (Au, Ag, Al, Mg) interfaces prepared in ultrahigh vacuum were investigated by ultraviolet photoelectron spectroscopy (UPS). We found that the electronic energy levels of ZnTPP align to the vacuum level of substrate metal, with a constant energy shift of vacuum levels across the interface. These findings cannot be explained by the simple models assuming vacuum level alignment at the interface. We also found that sample exposure to oxygen induces energy level shift in close relation with change of substrate work function at oxygen exposure.",

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AU - Narioka, S.

AU - Ishii, H.

AU - Yoshimura, D.

AU - Sei, M.

AU - Ouchi, Y.

AU - Seki, K.

AU - Hasegawa, S.

AU - Miyazaki, T.

AU - Harima, Y.

AU - Yamashita, K.

PY - 1995/12/1

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AB - Electronic structures of 5, 10, 15, 20-zinctetraphenylporphyrin (ZnTPP)/metal (Au, Ag, Al, Mg) interfaces prepared in ultrahigh vacuum were investigated by ultraviolet photoelectron spectroscopy (UPS). We found that the electronic energy levels of ZnTPP align to the vacuum level of substrate metal, with a constant energy shift of vacuum levels across the interface. These findings cannot be explained by the simple models assuming vacuum level alignment at the interface. We also found that sample exposure to oxygen induces energy level shift in close relation with change of substrate work function at oxygen exposure.

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