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Two novel indacenodithiophene (IDT) based narrow band-gap polymers (PIDT-BDTDPP and PIDT-TDPP) with pendant diketopyrrolopyrrole (DPP) units onto different main chains were designed and synthesized. The structures and properties of these main chain donor-side chain acceptor D-A copolymers were fully characterized. The PIDT-TDPP with pendant DPP units onto thiophene (T) units exhibited better light-harvesting...
A new donor–acceptor–donor ternary copolymer PTh-BDT-2DTDPP pending additional diketopyrrolopyrrole unit in the side of a donor unit has been synthesized and characterized. The bulk heterojunction polymer solar cells with an active layer of PTh-BDT-2DThDPP and PC 61 BM showed a high power conversion efficiency of 4.36%.•The D–A–D ternary copolymer with diketopyrrolopyrrole side chain was synthesized...
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