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In‐situ Apparent Mobility of Charge Carriers in Polyaniline Films Measured with a New Four‐band Electrode
Author(s) -
Jiang Xiaoqing,
Xue Wenbin,
Sun Peipei,
Harima Yutaka
Publication year - 2010
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201090171
Subject(s) - polyaniline , polaron , chemistry , conductivity , doping , charge carrier , electron mobility , electrode , thermal conduction , electrical resistivity and conductivity , condensed matter physics , analytical chemistry (journal) , chemical physics , optoelectronics , materials science , composite material , polymer , physics , electron , organic chemistry , quantum mechanics , polymerization
The in‐situ apparent mobility in polyaniline films was accurately measured in a wide doping region using a new four‐band electrode. It was found the apparent mobility in polyaniline films rises with increasing the doping level or carrier density. The influence of film thickness on the conductivity and apparent mobility of charge carriers was also investigated. The relative higher conductivity observed in a thinner film under low and intermediate doping potentials is assigned to the higher inter‐chain mobility related to the more ordered structure of the film. The mobility variations provide experimental evidence to confirm the inter‐chain path for hopping transport of polarons and the intra‐chain path for evolution of metallic conduction.