TY - JOUR
T1 - UV photoemission study of 8-hydroxyquinoline aluminum (ALQ3) / metal interfaces
AU - Sugiyama, K.
AU - Yoshimura, D.
AU - Ito, E.
AU - Miyazaki, T.
AU - Hamatani, Y.
AU - Kawamoto, I.
AU - Ouchi, Y.
AU - Seki, K.
AU - Ishii, H.
N1 - Funding Information:
The authors thank Dr. Syun Egusa and Dr. Takashi Sasaki of Advanced Research Laboratory, Toshiba R&D Center for the gift of the sample material. This work was performed as a Joint Studies Program of the UVSOR facility of the Institute for Molecular Science (No.6-H217). This work was supported in part by the Grant-in Aids for Scientifk Research (Nos. 07CE2004, 07NPO303, 04403001) and by the Venm Business Laboratory Program, both from the Ministry of Education, Science and C u l m of Japan.
PY - 1996
Y1 - 1996
N2 - Electronic structure of tris(8-hydroxyquinolino) aluminum (Alq3) / metal interface was directly investigated as a model interface of electroluminescent (EL) devices by UV photoemission spectroscopy (UPS). Simulated spectrum of Alq3 calculated by a MNDO / PM3 molecular orbital calculation showed a good correspondence with the observed UPS spectrum. Highest occupied molecular orbitals (HOMOs) of Alq3 was assigned to HOMO of the ligands. At Alq3 / metal interfaces, shift of the vacuum level was observed, in contrast to the traditional assumption with common vacuum level at the interface. Interfacial energy diagrams determined by the results of UPS corresponds well to actual carrier-injecting character at the interface.
AB - Electronic structure of tris(8-hydroxyquinolino) aluminum (Alq3) / metal interface was directly investigated as a model interface of electroluminescent (EL) devices by UV photoemission spectroscopy (UPS). Simulated spectrum of Alq3 calculated by a MNDO / PM3 molecular orbital calculation showed a good correspondence with the observed UPS spectrum. Highest occupied molecular orbitals (HOMOs) of Alq3 was assigned to HOMO of the ligands. At Alq3 / metal interfaces, shift of the vacuum level was observed, in contrast to the traditional assumption with common vacuum level at the interface. Interfacial energy diagrams determined by the results of UPS corresponds well to actual carrier-injecting character at the interface.
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U2 - 10.1080/10587259608042292
DO - 10.1080/10587259608042292
M3 - Article
AN - SCOPUS:4243058607
SN - 1542-1406
VL - 285-286
SP - 239
EP - 244
JO - Molecular Crystals and Liquid Crystals
JF - Molecular Crystals and Liquid Crystals
ER -