TY - JOUR
T1 - UPS studies of conducting polymers
T2 - Dopant effect on conjugated polymer systems sensitive to conductivity
AU - Takemura, Susumu
AU - Kitagawa, Yasuhisa
AU - Kato, Hitoshi
AU - Nakajima, Yasushi
N1 - Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 1996/7
Y1 - 1996/7
N2 - The valence bands of polypyrrole doped with various types of dopant have been investigated in order to clarify the polymer configurations associated with lattice distortion due to the dopants. Ultraviolet photoemission spectroscopy (UPS) spectra of doped and reduced polypyrrole exhibits two characteristic shoulders theoretically assigned to 2b 1 and 1a 2 π-orbitals. Increase of the density of states (DOS) at the 2b 1 level and decrease of the DOS at 1a 2 observed in the doped state indicate that doping affects the 2b 1 valence band related with π-orbitals of the N atom, which suggests the lattice distorted structure of the conjugated polymer system. Valence bands of samples doped with cyclic and polycyclic compounds give different spectrum profiles due to the π-electron systems.
AB - The valence bands of polypyrrole doped with various types of dopant have been investigated in order to clarify the polymer configurations associated with lattice distortion due to the dopants. Ultraviolet photoemission spectroscopy (UPS) spectra of doped and reduced polypyrrole exhibits two characteristic shoulders theoretically assigned to 2b 1 and 1a 2 π-orbitals. Increase of the density of states (DOS) at the 2b 1 level and decrease of the DOS at 1a 2 observed in the doped state indicate that doping affects the 2b 1 valence band related with π-orbitals of the N atom, which suggests the lattice distorted structure of the conjugated polymer system. Valence bands of samples doped with cyclic and polycyclic compounds give different spectrum profiles due to the π-electron systems.
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U2 - 10.1016/0169-4332(96)00266-8
DO - 10.1016/0169-4332(96)00266-8
M3 - Article
AN - SCOPUS:0030564410
VL - 100-101
SP - 107
EP - 111
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -