Journal
CHEMISTRY OF MATERIALS
Volume 19, Issue 22, Pages 5404-5409Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm071505s
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Two novel thiazolothiazole derivatives with trifluoromethylphenyl groups were synthesized and characterized by differential scanning calorimetry, X-ray single crystal analysis, UV-vis absorption spectroscopy, cyclic voltammetry, field-effect transistor (FET) characteristics, and X-ra diffraction. The I y FET characteristics of thiazole-thiazolothiazole derivatives are strongly dependent on the nitrogen positions. The derivative with a 2-(4-trifluoromethylphenyl)thiazole unit afforded a high performance FET device that showed a high electron mobility of 0. 12 cm 2 V-1 s(-1) with a bottom contact configuration. Moreover, with a top contact configuration, high electron mobilities of 0.24-0.64 cm 2 V-1 s(-1) and low threshold voltages of 18-24 V depending on the surface modification were achieved. The relationship between molecular structure, molecular packing, electrical characteristics, film structure, and FET performance were investigated.
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