Electronic structure ofLa2−xSrxNiO4studied by photoemission and inverse-photoemission spectroscopy

1992 ◽  
Vol 45 (21) ◽  
pp. 12513-12521 ◽  
Author(s):  
H. Eisaki ◽  
S. Uchida ◽  
T. Mizokawa ◽  
H. Namatame ◽  
A. Fujimori ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Photoemission Spectroscopy ◽  
Inverse Photoemission ◽  
Inverse Photoemission Spectroscopy

Modification on the Unoccupied Electronic Structure of Organic Semiconductor by Alkali Metal

2007 ◽  
Vol 1029 ◽  
Author(s):  
Huanjun Ding ◽  
Kiwan Park ◽  
Yongli Gao
Keyword(s):  
Electronic Structure ◽  
Alkali Metal ◽  
Direct Evidence ◽  
Copper Phthalocyanine ◽  
Photoemission Spectroscopy ◽  
Inverse Photoemission ◽  
Lowest Unoccupied Molecular Orbital ◽  
Inverse Photoemission Spectroscopy ◽  
Doping Ratio ◽  
Gap State

AbstractWe have investigated the evolution of both the occupied and unoccupied states for alkali metal (Cs and Na) doped Copper-Phthalocyanine (CuPc) with photoemission and inverse photoemission spectroscopy. As the doping ratio increases, the lowest unoccupied molecular orbital (LUMO) of CuPc shifts downward, reaching the Fermi level. After the saturation, the LUMO intensity decreases monotonically, while a gap state grows in the valence spectra, which gives direct evidence for the origin of the doping-induced gap state in CuPc molecules.

Photoemission Investigation of the Energy Level Alignment at the Rubrene/metal Interface

2007 ◽  
Vol 1029 ◽  
Author(s):  
Huanjun Ding ◽  
Yongli Gao
Keyword(s):  
Electronic Structure ◽  
Energy Level ◽  
Photoemission Spectroscopy ◽  
Strong Interactions ◽  
Metal Interface ◽  
Interface Dipole ◽  
Inverse Photoemission ◽  
Level Shifts ◽  
Lowest Unoccupied Molecular Orbital ◽  
Inverse Photoemission Spectroscopy

AbstractThe electronic structure of the interfaces between rubrene and various metals, including Au, Ag, Al, and Ca, have been investigated with photoemission and inverse photoemission spectroscopy. The formation of the interface dipole is observed at all interfaces. The Fermi level shifts linearly within the band gap as a function of metal workfunction, until it is pinned at the lowest unoccupied molecular orbital (LUMO) by Ca. Strong interactions take place at the interface between rubrene and Ca, evidenced by the evolution of the valence features.

Electronic structure of the prototypical As:Si(111)-1×1 surface investigated by inverse-photoemission spectroscopy

1994 ◽  
Vol 49 (23) ◽  
pp. 16539-16543 ◽  
Author(s):  
S. Bouzidi ◽  
T. Angot ◽  
F. Coletti ◽  
J.-M. Debever ◽  
J.-L. Guyaux ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Photoemission Spectroscopy ◽  
Inverse Photoemission ◽  
Inverse Photoemission Spectroscopy

Electronic Structure of Ionic Liquids Studied by UV Photoemission and Inverse Photoemission Spectroscopy

2006 ◽  
Vol 965 ◽  
Author(s):  
Toshio Nishi ◽  
Yasunori Kamizuru ◽  
Kaname Kanai ◽  
Yukio Ouchi ◽  
Kazuhiko Seki
Keyword(s):  
Electronic Structure ◽  
Ionic Liquids ◽  
Electronic Structures ◽  
Band Gaps ◽  
Photoemission Spectroscopy ◽  
Calculated Density ◽  
Inverse Photoemission ◽  
Ultraviolet Photoemission Spectroscopy ◽  
Inverse Photoemission Spectroscopy ◽  
Highest Occupied Molecular Orbitals

ABSTRACTElectronic structures of the ionic liquids were studied by ultraviolet photoemission spectroscopy (UPS) and inverse photoemission spectroscopy (IPES). The sample materials contain 1-buthyl-3-alkylimidazolium ion [Cnmim]+ (n=4, 8, 10) as the cation in combination with fluorine-containing anions (tetrafluoroboronate BF4−, hexafluorophosphate PF6−). Comparing the calculated density of states with the observed spectra, we found that the ionization thresholds of these ionic liquids are determined by the highest occupied molecular orbitals (HOMO) of the cation, although the calculated HOMOs of the isolated anions are higher than that of isolated cation. The combination of the UPS and IPES results reveals that the band gaps of these ionic liquids are determined by only cation.

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