| Autor: |
Paloheimo, Jari, Laakso, Kaarina, Isotalo, Heikki, Stubb, Henrik |
| Jazyk: |
angličtina |
| Rok vydání: |
1995 |
| Zdroj: |
Paloheimo, J, Laakso, K, Isotalo, H & Stubb, H 1995, ' Thermoelectric power and field-effect mobility in self-assembled films of poly-and oligoanilines ', Synthetic Metals, vol. 68, no. 3, pp. 249-257 . https://doi.org/10.1016/0379-6779(94)02308-L |
| DOI: |
10.1016/0379-6779(94)02308-L |
| Popis: |
Thin conducting films of polyanilines and oligoanilines were deposited by using a layer-by-layer self-assembly process. Conductivity, thermoelectric power and field-effect measurements were performed on the films. The highest conductivities were around 1 S cm−1 at room temperature. The conductivity was studied as a function of temperature and was found to obey the T-12 law of variable-range hopping. The thermoelectric power of the films was initially n-type in air at room temperature, but changed its sign to p-type under vacuum or with time. A linear temperature dependence was observed and related to the contribution from metallic polymer chain segments. The field effect, measured using thin film transistor structures, was always n-type and the field-effect mobilities about 10−6-10−3cm2 V−1 S−1. The Coulomb gap model gives a good description of the system still lacking an expression for the field effect. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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