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Thienopyrazine or dithiadiazatrindene containing low band gap conjugated polymers for polymer solar cells |
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| Authors: | Mukhamed L. Keshtov Dmitry V. Marochkin Ying-ying Fu Zhi-yuan Xie Yan-hou Geng Vitaly S. Kochurov Alexei R. Khokhlov |
| Affiliation: | 1. A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 119991, GSP-1, Moscow, V-334, Vavilova St. 28, Russia 2. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China 3. Lomonosov Moscow State University, Faculty of Physics, 119991, Moscow, GSP-1, 1-2 Leninskiye Gory, Russia |
| Abstract: | Four new low-band-gap alternating copolymers(P-1, P-2, P-3 and P-4) based on electron-rich benzodithiophene and newly developed electron-deficient units, thienopyrazine or dithiadiazatrindene derivatives, were synthesized by Stille polycondensation. All polymers exhibit good solubility in common organic solvents and a broad absorption band in the visible to near-infrared regions. The film optical band gaps of the polymers are in the range of 1.28-2.07 eV and the highest occupied molecular orbital(HOMO) energy levels are in the range of-4.99 eV to-5.28 eV. Bulk heterojunction polymer solar cells(PSCs) of the polymers were fabricated with phenyl-C61-butyric acid methyl ester(PC61BM) as acceptor material, and a power conversion efficiency of 0.80% was realized with P-1 as donor material. |
| Keywords: | Low band gap Conjugated polymers Electron-deficient aromatics Polymer solar cells. |
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