AVS 53rd International Symposium
    Surface Science Tuesday Sessions
       Session SS-TuP

Paper SS-TuP45
XPS and FTIR Study of Electrochemical Doping of Fullerene and Copper Phthalocyanine Molecules in Conducting Polymers

Tuesday, November 14, 2006, 6:00 pm, Room 3rd Floor Lobby

Session: Surface Science Poster Session
Presenter: H. Kato, Kanto Gakuin University, Japan
Authors: H. Kato, Kanto Gakuin University, Japan
S. Takemura, Kanto Gakuin University, Japan
Y. Watanabe, Kanto Gakuin University, Japan
A. Ishii, Kanto Gakuin University, Japan
I. Tsuchida, Kanto Gakuin University, Japan
Y. Akai, Kanto Gakuin University, Japan
T. Sugiyama, Kanto Gakuin University, Japan
T. Hiramatsu, Kanto Gakuin University, Japan
N. Nanba, Kanto Gakuin University, Japan
K. Iwasaki, Kanto Gakuin University, Japan
O. Nishikawa, Kanazawa Institute of Technology, Japan
M. Taniguchi, Kanazawa Institute of Technology, Japan
Correspondent: Click to Email
Conducting polymer polythiophene (PT) films incorporated with fullerene C60 and copper phthalocyanine (PcCu), which were highly functional molecule, were prepared by electrochemical doping and casting methods. Electrochemical doping of C60 was conducted by adopting different applying voltage polarity. C60 doping proceeded in C60 dissolved toluene by applying positive or negative voltage to a PT film. Electrochemical doping of PcCu was also conducted in PcCu dissolved toluene by applying negative voltage to a PT film. Charge transfer and interaction between the doped molecules and PT polymer chains, varied with the doping measures, were investigated by XPS analysis of the core-level energies and spectral profiles of the atomic components. Vibration states of the doped molecule and the polymer backbone were also investigated by FTIR RAS and FTIR transmission. In the case of C60 doped PT, regarding electrochemical doping, applied voltage polarity made quite a different C 1s core level spectral profiles. A large split peak associated with shifted peaks due to C60 and the charged states appeared in the case of positive polarity while serial ordered peaks with the same energy distance appeared due to C60 charged states in the case of negative polarity. In FTIR measurements, frequency position of F1u mode at 1400cm-1 , which was sensitive to charged states of C60 varied with applied voltage polarity. In the case of PcCu doped PT, PcCu-origin peaks on the higher energy side appeared in the C 1s spectrum associated with the signal detection of N 1s and Cu 2p. In FTIR measurements, characteristic vibrational modes to PcCu, in-plane, out-of-plane, and ring stretching modes were observed. Central metal-origin peak was also observed. New peaks at 1545 cm-1 and 1680 cm-1 indicates the possibility of the polymer- PcCu linkage.