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Electroabsorption in Conjugated Polymers
Author(s) -
Horváth Á.,
Bässler H.,
Weiser G.
Publication year - 1992
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221730229
Subject(s) - conjugated system , exciton , polymer , oscillator strength , spectral line , materials science , order (exchange) , optoelectronics , chemical physics , molecular physics , condensed matter physics , physics , composite material , quantum mechanics , finance , economics
Electroabsorption measurements are peformed with solution cast films of poly‐(dodecylthiophene) and poly‐(phenylphenylenevinylene). The spectra are described within the framework of second‐order Stark effect acting on an excitonic transitonic including field‐induced transfer of oscillator strength to higher lying states. The spatial extent of the exciton is two to three repeat units of the polymer backbone consistent with the notion that the absorbers are ordered subunits of the conjugated chain.