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 |
|---|---|
| Pages (from-to) | 1899 |
| Number of pages | 1 |
| Journal | Applied Physics Letters |
| Volume | 67 |
| DOIs | |
| Publication status | Published - 1995 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
The electronic structure and energy level alignment of porphyrin/metal interfaces studied by ultraviolet photoelectron spectroscopy. / Narioka, S.; Ishii, H.; Yoshimura, D.; Sei, M.; Ouchi, Y.; Seki, K.; Hasegawa, S.; Miyazaki, Takafumi; Harima, Y.; Yamashita, K.
In: Applied Physics Letters, Vol. 67, 1995, p. 1899.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The electronic structure and energy level alignment of porphyrin/metal interfaces studied by ultraviolet photoelectron spectroscopy
AU - Narioka, S.
AU - Ishii, H.
AU - Yoshimura, D.
AU - Sei, M.
AU - Ouchi, Y.
AU - Seki, K.
AU - Hasegawa, S.
AU - Miyazaki, Takafumi
AU - Harima, Y.
AU - Yamashita, K.
PY - 1995
Y1 - 1995
N2 - 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.
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.
UR - http://www.scopus.com/inward/record.url?scp=0000664458&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000664458&partnerID=8YFLogxK
U2 - 10.1063/1.114370
DO - 10.1063/1.114370
M3 - Article
AN - SCOPUS:0000664458
VL - 67
SP - 1899
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
ER -