Diketopyrrolopyrrole–thiophene–benzothiadiazole random copolymers: an effective strategy to adjust thin-film crystallinity for transistor and photovoltaic properties

H Li, F Liu, X Wang, C Gu, P Wang, H Fu

Index: Li, Hui; Liu, Fangbin; Wang, Xuedong; Gu, Chunling; Wang, Ping; Fu, Hongbing Macromolecules, 2013 , vol. 46, # 23 p. 9211 - 9219

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Citation Number: 26

Abstract

Three new low bandgap conjugated random copolymers, containing two acceptors diketopyrrolopyrrole (DPP) and benzothiadiazole (BTD) linked by thiophene donors, were designed and synthesized using Pd-catalyzed Stille-coupling methods. The ratio between DPP and BTD was varied from N= 3: 7 to 1: 1 to 7: 3 in the polymer backbones. Thin-film device measurements indicate that these polymers exhibit different trends in field-effect ...