Using Stille and Suzuki polymerization reactions we incorporate thienoisoindigo (TII) as an acceptor co-monomer into a series of alternating π-conjugated copolymers with combinations of benzene, thiophene and carbazole as donor co-monomers. By changing the nature and length of the donor segments, the optical band gap of these soluble TII copolymers can be varied over a large range from 1.52 eV down to 0.87 eV. The semiconducting properties of the TII copolymers were established in bottom-gate bottom-contact field-effect transistors that provide hole mobilities for these materials in the range of 10−3 to 10−2 cm2 V−1 s−1.
我们利用斯蒂尔(Stille)和铃木(Suzuki)聚合反应,将
噻吩异靛蓝(TII)作为受体共聚单体,与苯、
噻吩和
咔唑作为供体共聚单体,结合成一系列交替π共轭共聚物。通过改变供体部分的性质和长度,这些可溶性TII共聚物的光带隙可以在1.52eV到0.87eV之间变化。TII共聚物的半导体特性在底部栅极底部接触场效应晶体管中得以确立,这些材料在10-3到10-2 cm2 V-1 s-1范围内的空穴迁移率。