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Picosecond Photoconductivity Studies on Phenyl‐Substituted Poly (Phenylenevinylene) Derivatives
Author(s) -
Li Haoliang,
Rentsch S.,
Yang Jiping,
Lenzner M.,
Bergner H.
Publication year - 1990
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.2221620227
Subject(s) - picosecond , oligomer , nanosecond , photoconductivity , polaron , materials science , relaxation (psychology) , polymer , electron mobility , photochemistry , polymer chemistry , optoelectronics , chemistry , optics , electron , physics , psychology , social psychology , laser , quantum mechanics , composite material
Time resolved transient photoconductivity (PC) measurements are performed on phenyl‐substituted poly (phenylenevinylene) (P‐PPV) derivatives and one oligomer. The photogenerated carriers are assigned to be polarons and bipolarons, which are responsible for the picosecond and nanosecond PC components, respectively. By a deconvolution procedure the relaxation times are obtained for both components. The PC, the mobility, and the migration distance of carriers are obtained. Polymer and oligomer exhibit nearly the same value of electrical mobility. The hopping mechanism of carriers in the P‐PPV seems to be the dominating process for PC.