Further analysis of space-charge-limited currents in polybenzo[c]thiophene films
The temperature dependence of space-charge-limited currents in polybenzo[c]thiophene (PBCT) films in a sandwich structure of aluminum/PBCT/indium–tin–oxide is presented. Free carrier space-charge-limited currents are identified and the free carrier mobility has been estimated to be ∼3×10−5 cm2 V−1 s...
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Veröffentlicht in: | Journal of applied physics 1998-05, Vol.83 (10), p.5558-5560 |
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Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | The temperature dependence of space-charge-limited currents in polybenzo[c]thiophene (PBCT) films in a sandwich structure of aluminum/PBCT/indium–tin–oxide is presented. Free carrier space-charge-limited currents are identified and the free carrier mobility has been estimated to be ∼3×10−5 cm2 V−1 s−1. A trap of concentration ∼1.8×1017 cm−3 and energy ∼0.67 eV from the highest occupied molecular orbital level is estimated. The thickness dependence of the current, at constant voltage, is very close to that expected for a space-charge-limited mechanism. The Tauc band gap determined by optical spectrophotometry was found to be ∼1.34 eV. |
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ISSN: | 0021-8979 1089-7550 |
DOI: | 10.1063/1.367497 |