Conjugated terpolymers synthesized by incorporating anthracene units into the backbones of the diketopyrrolopyrrole-based polymers as electron donors for photovoltaic cells. Issue 44 (21st October 2016)

• Record Type: Journal Article
• Authors: Ju, Huajun; Yang, Yang; Wang, Zhijie; Yang, Sifen; Liu, Zitong; Zhang, Guanxin; Zhang, Deqing
• Is Part Of: Polymer chemistry. Volume 7:Issue 44(2016)
• Page Start: 6798
• Page End: 6804
• Publication Date: 2016-10-21
• Subjects: Polymers -- Periodicals; Macromolecules -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1039/c6py01522k
• Languages: English
• ISSNs: 1759-9954

Abstract

Abstract : Three new conjugated D–A terpolymersPADPP1, PADPP2 andPADPP3, which contain diketopyrrolopyrrole (DPP) as electron acceptors and thiophene/anthracene as electron donors for photovoltaic cells, are described. Abstract : Three new conjugated D–A terpolymersPADPP1, PADPP2 andPADPP3, which contain diketopyrrolopyrrole (DPP) as electron acceptors and thiophene/anthracene as electron donors, are described. In comparison withPDPP3T which contains just DPP and thiophene units, the DPP moieties are partially replaced with anthracene units inPADPP1, PADPP2 andPADPP3 . The HOMO/LUMO levels ofPADPP1, PADPP2 andPADPP3 are slightly enhanced in comparison with those ofPDPP3T . Moreover, the incorporation of the anthracene units into the backbones leads to the formation of nanofibrils with an appropriate width within the blending thin films ofPADPP2 with PC71 BM. The short circuit currents ( J SC ) of the photovoltaic cells with blends ofPADPP1, PADPP2 andPADPP3 with PC71 BM are higher than those with thePDPP3T /PC71 BM blend. As a result, PADPP1, PADPP2 andPADPP3 display better photovoltaic performances thanPDPP3T after blending each polymer with PC71 BM under the same conditions. The PCE of the photovoltaic cell of thePADPP2 /PC71 BM blending thin film at a weight ratio of 1 : 2 as the active layer can reach 6.24%.