Huajie Chen, Yunlong Guo, Xiangnan Sun, Dong Gao, Yunqi Liu and Gui Yu Synthesis and characterization of phenanthrocarbazole–diketopyrrolopyrrole copolymer for high-performance field-effect transistors Journal of Polymer Science Part A: Polymer Chemistry 51
A novel ladder-type phenanthrocarbazole-based copolymer poly[N-(2-octyldodecyl)-4,8-phenanthro[1,10,9,8-c,d,e,f,g]carbazole-alt-2,5-dihexadecyl-3,6-di(thiophen-2-yl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione] (PPDPP) was designed and synthesized by vertically extending π-conjugation along polymer main-chain. Highly conjugated polymer backbone facilitated orderly π–π stacking and charge-carrier transport. A high hole mobility of 0.30 cm2/V s and a current on/off ratio above 105 had been demonstrated. These results indicated that the copolymers constructed by this kind of ladder-type cores could be promising organic semiconductors for potential applications in organic optoelectronics.
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