Thermally stimulated current studies of charge transport in a σ-conjugated polymer

Thermally stimulated current (TSC) measurements on the σ-conjugated polymer, polymethylphenylsilane (PMPS), are shown to be applicable to the study of hopping transport in this hole-conducting medium. The well-defined hopping peak is dependent both on electric field and heating rate, with the peak t...

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Bibliographic Details
Published inChemical physics letters Vol. 159; no. 2; pp. 227 - 230
Main Authors Samuel, L.M., Sanda, P.N., Miller, R.D.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 07.07.1989
Elsevier Science
Subjects
Applied sciences
Electrical, magnetic and optical properties
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Conjugated polymer
Temperature
Electrical conductivity
Transport properties
Electrical properties
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Summary:Thermally stimulated current (TSC) measurements on the σ-conjugated polymer, polymethylphenylsilane (PMPS), are shown to be applicable to the study of hopping transport in this hole-conducting medium. The well-defined hopping peak is dependent both on electric field and heating rate, with the peak temperature occurring between 100 and 150 K. The corresponding activation energies range from 0.2 eV at 30 V/μm to 0.3 eV at 5 V/μ, in agreement with time of flight measurements. A secondary peak at ≈ 180 K attributed to surface trap states was observed only after high exposure doses. These traps had an activation energy of ≈ 0.5 eV and were distinguished from the direct hopping contribution to the current.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(89)87414-7