Random D–A1–D–A2terpolymers based on benzodithiophene, thiadiazole[3,4-e]isoindole-5,7-dione and thieno[3,4-c]pyrrole-4,6-dione for efficient polymer solar cells
| Autor: | Ahmed Najari, Mario Leclerc, Serge Beaupré, Sepideh Shaker-Sepasgozar |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Materials science Renewable Energy Sustainability and the Environment Energy conversion efficiency 02 engineering and technology General Chemistry Electron acceptor 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 7. Clean energy Acceptor Polymer solar cell 0104 chemical sciences chemistry.chemical_compound chemistry Polymerization Polymer chemistry Copolymer Physical chemistry General Materials Science 0210 nano-technology Isoindole HOMO/LUMO |
| Zdroj: | Journal of Materials Chemistry A. 5:6638-6647 |
| ISSN: | 2050-7496 2050-7488 |
| Popis: | Recent developments on regio-regular and random terpolymers based on a donor/acceptor architecture (D1–A–D2–A or D–A1–D–A2) have shown promising results for their use as donor materials in bulk heterojunction (BHJ) polymer solar cells. New random terpolymers including benzo[1,2-b:4,5-b′]-dithiophene (BDT) as the electron-donor moiety and thiadiazolo[3,4-e]isoindole-5,7-dione (TID) and thieno[3,4-c]pyrrole-4,6-dione (TPD) as electron-accepting moieties were synthesized by Stille cross-coupling polymerization. Incremental addition of TPD (from 0 to 90%) led to the following random terpolymers: P[(BDT-TID)x-(BDT-TPD)y]n. Their electro-optical and photovoltaic properties were investigated. These high molecular weight and highly processable random terpolymers exhibited broad and strong absorption (300–800 nm), moderate bandgaps (1.52 eV to 1.64 eV) and deep-lying HOMO/LUMO energy levels (−5.6 eV and −3.9 eV, respectively). First, the optimized inverted device ITO/ZnO/P1:PC71BM/MoO3/Ag (where P1 is a typical D/A copolymer; TID 100%; TPD 0%) showed a power conversion efficiency up to 6.36% which is higher than the PCE reported in the literature for an analog of P1 (3.42%). Then, devices based on random terpolymers (P2–P10) showed power conversion efficiencies ranging from 5.06% (for P7; 40% TID/60% TPD) up to 6.70% (for P2; 90% TID/10% TPD) when PC61PM is used as the electron acceptor. A PCE as high as 7.30%, a Voc of 0.81 V, a Jsc of 13.86 mA cm−2 and a FF of 65% were achieved for P2 when PC71PM was used. This PCE is among the highest PCE values reported for random terpolymer-based polymer solar cells. |
| Databáze: | OpenAIRE |
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