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DC electrical conduction in solution‐grown pure and iodine‐doped poly(butylene terephthalate) films
Author(s) -
Dasaradhudu Y.,
Rao V. V. R. Narasimha
Publication year - 1994
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1994.210350405
Subject(s) - materials science , thermal conduction , activation energy , electrical conduction , isothermal process , doping , atmospheric temperature range , electrical resistivity and conductivity , schottky barrier , impurity , schottky diode , aluminium , schottky effect , analytical chemistry (journal) , composite material , optoelectronics , electrical engineering , chemistry , thermodynamics , physics , organic chemistry , diode , chromatography , engineering
DC electrical conduction in poly(butylene terephthalate) films sandwiched between planar aluminium electrodes was investigated. The films were grown by the isothermal immersion technique. The conduction process was studied in the temperature range 300–450K, with an applied electric field of 0.22 × 10 7 −6.66 × 10 7 Vm −1 . It was found that the Richardson‐Schottky type of conduction mechanism was dominant throughout the temperature range of study. The values of the Schottky field lowering constant β, the effective metalinsulator potential barrier and the activation energy were evaluated. The value of the activation energy ( U = 0.7 eV) indicates the predominance of electronic conduction. The effect of impurities like iodine on electrical conduction was also investigated.