Influence of solvents on the electrical parameters of poly(2,5-bis(3-alkylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT) field effect transistor
Abstract
In this study, we investigate the influence of solvents with different boiling points on the electrical performances of poly(2,5-bis(3-alkylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT) transistors. To dissolve PBTTT for thin-film processing, we used toluene, chlorobenzene (CB), and tetrahydrofuran (THF). The highest obtained field effect mobilities were about 3.42 × 10−2 cm2 V−1 s−1, 1.62 × 10-3 cm2 V−1 s−1, and 1.78 × 10-2 cm2 V−1 s−1, respectively, for PBTTT devices using chlorobenzene, toluene, and tetrahydrofuran and heated respectively at 120 °C, 150 °C, and 120 °C. In order to point out the role of morphological properties, AFM images were performed. We observed liquid crystalline state formation in PBTTT film from THF and toluene which drive the electrical parameters over grain size.
- Publication:
-
MRS Advances
- Pub Date:
- October 2023
- DOI:
- 10.1557/s43580-023-00577-3
- Bibcode:
- 2023MRSAd...8..723D
- Keywords:
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- PBTTT;
- Solvent;
- Temperature;
- Field Effect transistor