期刊
SYNTHETIC METALS
卷 223, 期 -, 页码 205-211出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2016.11.026
关键词
Porphyrin; Pendant groups; Diketopyrrolopyrrole; Copolymers; Synthesis; Polymer solar cells
资金
- National Natural Science Foundation of China [21474081]
A series of copolymers containing zinc porphyrin (ZP) derivatives as pendant groups and diketopyrrolopyrrole (DPP) as electron-withdrawing units were designed and synthesized by Stille-coupling polymerization. The introduction of zinc porphyrin derivatives enhances the light-harvesting capability and leads to a complementary absorption at short wavelength band. The absorption of the copolymers can be well-tuned by varying the ratio of zinc porphyrin derivatives and DPP units. The results indicated that copolymer P(ZP-BT-DPP4) with ZP/DPP ratio of 1:4 showed an strong absorption in the range of 400-900 nm. The power conversion efficiency (PCE) of 2.44% with an increasedJ(SC) of 6.14 mA/cm(2) was achieved due to the better light-harvesting ability and suitable active film morphology. (C) 2016 Elsevier B.V. All rights reserved.
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