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The ionic mechanism of the electrochemical doping of poly (3–methylthiophene) studied by secondary ion mass spectroscopy (SIMS)
Author(s) -
Chao F.,
Baudoin J. L.,
Costa M.,
Lang P.
Publication year - 1987
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19870080115
Subject(s) - coulometry , doping , ion , ionic bonding , electrochemistry , analytical chemistry (journal) , materials science , secondary ion mass spectrometry , polymer , conductive polymer , mass spectrometry , chemistry , electrode , chromatography , organic chemistry , composite material , optoelectronics
Abstract The concentration profiles of C10 4 − and Li + into the poly(3‐methylthiophene) structure were referred to the 3‐methylthiophene concentration for several doping levels during the doping and the undoping processes. The ion amount is very different in the polymer bulk and in a surface region of about 150 Å thickness. The cation is shown to play a role in the first step of the undoping mechanism. The paired ions concentration was determined and an actual doping ratio could be deduced which is different from that calculated by coulometry.