Benzothieno[2,3-b]thiophene semiconductors: synthesis, characterization and applications in organic field-effect transistors
作者:Ying Liu、Zhiyang Liu、Hao Luo、Xiaodong Xie、Ling Ai、Ziyi Ge、Gui Yu、Yunqi Liu
DOI:10.1039/c4tc01688b
日期:——
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.
描述了一种高效合成一系列苯并噻吩并[2,3-b]噻吩(BTT)衍生物的方法,这些衍生物作为具有不同桥接间隔物的重要核心。当前化合物的耐热性质稳定:在高达300°C的温度下,未观察到相变或热分解。相邻分子晶体叠层发生位移,使得分子间π重叠接近1/3。基于BTTB的有机场效应晶体管(OFETs)展现出优异的场效应性能,室温下迁移率为0.46 cm² V⁻¹ s⁻¹,开-关电流比大于10⁷。所有结果表明,这些苯并噻吩并[2,3-b]噻吩衍生物是光电设备的潜在材料。