Photoelectron fine structures of uppermost valence band for well-characterized ClAl-phthalocyanine ultrathin film: UPS and MAES study

Electronic Structure of C60/Phthalocyanine/ITO Interfaces Studied using Soft X-ray Spectroscopies

“…Kera et al have reported that the molecular orientation of the outmost layer affects the shape of photoemission spectra from the valence band and HOMO in ClAlPc. 22 If the direction of the chlorine bond in the outermost layer is toward the substrate, the photoemission intensity of π-related molecular orbitals (the HOMO and the feature at ∼3.5 eV) is very weak. Furthermore the shape of the HOMO PES spectrum is also different depending on the direction of the chlorine bond in the outermost layer.…”

Control of the dipole layer of polar organic molecules adsorbed on metal surfaces via different charge-transfer channels

“…12 Dependence of the ELA on the polar-molecule orientation and packing density has also been reported [13][14][15][16][17][18][19][20][21][22] , and connection to device applications has been demonstrated. [23][24][25] Hosokai et al, who compared the as-grown (AG) and annealed (AN) chlorogallium-phthalocyanine (ClGaPc) films grown on highly oriented pyrolytic graphite (HOPG), reported large band bending of the HOMO state for the AG films with a stacked bilayer structure, but this band bending could be suppressed in the AN films because of the formation of a uniform Cl-up configuration after the thermal treatment; 13 the substrate, HOPG, was however fairly inert in this case, and charge transfer at the organic/metal interface was expected to be minimal.…”

The Role of the Ionization Potential in Vacuum‐Level Alignment at Organic Semiconductor Interfaces

“…The f of the polar-Pc/graphite systems could be controlled by using different polar Pcs. [13][14][15][16][17] On graphite, the molecule-substrate interaction is very small because of weak van der Waals interactions, and thus a quasi-2D dipole layer can be intentionally realized by preparing an oriented polar Pc layer. [17] Furthermore, there is a negligible chemical interaction between pentacene and the Pc-modified substrate.…”

“…The Pc-modified substrates were chosen to use the inert characteristics of the surfaces with a wide range of work function values. The following hybrid systems were used as substrates: ClAlPc (monolayer) on graphite (f sub = 4.92 eV), [14] OVPc (monolayer) on graphite (f sub = 4.77 eV), [15] and PbPc (monolayer) on graphite (f sub = 4.27 eV). [13] The method used to prepare the Pc monolayers has been described elsewhere.…”