Abstract
New benzo[b]benzo[4,5]thieno[2,3-d]thiophene derivatives were synthesized and characterized as organic semiconductors in top-contact/bottom-gate organic thin-film transistors (OTFTs). New compounds were fully characterized by thermogravimetric analysis, differential scanning calorimetry, UV–vis spectroscopy, cyclic voltammetry, and density functional theory calculation. New compounds were vacuum-deposited as thin films, and investigated by X-ray diffraction (XRD) and atomic force microscopy (AFM). Thin-film transistors based on compound 1 showed decent p-channel characteristics with mobility as high as 0.58cm2V−1s−1 and current on/off ratio of 106–109. Thin film microstructure and surface morphologies have been correlated with the corresponding device performance.
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