title: Angle-resolved UV photoelectron spectra (UPS) of thin films of perylene-3,4,9,10-tetracarboxylic dianhydride on MoS(2).
abstract: Angle-resolved UV photoelectron spectra (ARUPS) were measured for thin films of perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) deposited on cleaved MoS(2) surfaces. The take-off angle (theta) dependence of the photoelectron intensity of the highest pi band showed a sharp maximum at theta = 32-34 degrees. A spectral feature of the binding energy at approximately 8.9 eV, which is believed to originate from a pi state, showed a remarkably different theta dependence from that of the pi band. A quantitative analysis of the observed theta dependencies clearly indicates that (a) the feature at approximately 8.9 eV originates from the oxygen 2p non-bonding states and (b) the molecules lie flat on the substrate surface.
authors.affiliation: Graduate School of Science and Technology, Chiba University, Chiba 263-8522, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Azuma
authors.forename: T
authors.initials: T
authors.lastname: Hasebe
authors.forename: T
authors.initials: T
authors.lastname: Miyamae
authors.forename: K K
authors.initials: KK
authors.lastname: Okudaira
authors.forename: Y
authors.initials: Y
authors.lastname: Harada
authors.forename: K
authors.initials: K
authors.lastname: Seki
authors.forename: E
authors.initials: E
authors.lastname: Morikawa
authors.forename: V
authors.initials: V
authors.lastname: Saile
authors.forename: N
authors.initials: N
authors.lastname: Ueno