Benzothieno[2,3-b]thiophene semiconductors: synthesis, characterization and applications in organic field-effect transistors†
Abstract
An efficient synthetic approach to a series of benzothieno[2,3-b]thiophene (BTT) derivatives used as an important core with different bridge spacers is described. Thermal properties of the present compounds are stable: neither phase transition nor thermal decomposition was observed up to 300 °C. The adjacent molecule crystal stackings are shifted affording a nearly 1/3 intermolecular π-overlap. The OFETs based on BTTB exhibit excellent field-effect performances with a mobility of 0.46 cm2 V−1 s−1 and on–off current ratios larger than 107 at room temperature. All the results demonstrate these benzothieno[2,3-b]thiophene derivatives as promising materials for optoelectronic devices.
![Graphical abstract: Benzothieno[2,3-b]thiophene semiconductors: synthesis, characterization and applications in organic field-effect transistors](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C4TC01688B&imageInfo.ImageIdentifier.Year=2014)
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