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A Donor–Acceptor Polymer with a Peculiar Negative‐Charge‐“Trapping” Characteristic
Author(s) -
CasalboreMiceli G.,
Gallazzi M.C.,
Zecchin S.,
Camaioni N.,
Geri A.,
Bertarelli C.
Publication year - 2003
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200304250
Subject(s) - materials science , polythiophene , intramolecular force , trapping , intermolecular force , charge (physics) , acceptor , terthiophene , chemical physics , polymer , photochemistry , conductive polymer , organic chemistry , condensed matter physics , molecule , chemistry , ecology , physics , quantum mechanics , composite material , biology
Voltammetric and spectrophotometric measurements of poly(3,3″‐dipentoxy‐3′‐dicyanoethenyl‐2,2′:5′,2″‐terthiophene) (polyCN) films, in connection with other experimental evidence, reveal a normal oxidative, but a peculiar reductive behavior consisting of trapping of the negative charge during the cathodic scan. Another interesting property of polyCN films is the tendency to form strong intramolecular and intermolecular associations, probably charge‐transfer (CT) complexes. These properties could account for the fact that the photovoltaic performance does not improve when polyCN is blended with a polythiophene donor.