Morphological Stabilization by Supramolecular Perfluorophenyl-C60Interactions Leading to Efficient and Thermally Stable Organic Photovoltaics
| Autor: | Chain-Shu Hsu, Ming Hung Liao, Che En Tsai, Yen-Ju Cheng, Jhong Sian Wu, Yu Ying Lai, Fong Yi Cao, Ian Liau, Chien-Lung Wang |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
Fullerene Materials science Organic solar cell Doping Supramolecular chemistry Polymer Condensed Matter Physics Isothermal process Electronic Optical and Magnetic Materials Biomaterials chemistry.chemical_compound chemistry Chemical engineering Electrochemistry Phenyl group Organic chemistry Ternary operation |
| Zdroj: | Advanced Functional Materials. 24:1418-1429 |
| ISSN: | 1616-301X |
| DOI: | 10.1002/adfm.201300437 |
| Popis: | A new PC61BM-based fullerene, [6,6]-phenyl-C61 butyric acid pentafluorophenyl ester (PC61BPF) is designed and synthesized. This new n-type material can replace PC61BM to form a P3HT:PC61BPF binary blend or serve as an additive to form a P3HT:PC61BM:PC61BPF ternary blend. Supramolecular attraction between the pentafluorophenyl group of PC61BPF and the C60 cores of PC61BPF/PC61BM can effectively suppress the PC61BPF/PC61BM materials from severe aggregation. By doping only 8.3 wt% PC61BPF, device PC61BPF651 exhibits a PCE of 3.88% and decreases slightly to 3.68% after heating for 25 h, preserving 95% of its original value. When PC61BP with non-fluorinated phenyl group is used to substitute PC61BPF, the stabilizing ability disappears completely. The efficiencies of PC61BP651 and PC61BP321 devices significantly decay to 0.44% and 0.11%, respectively, after 25 h isothermal heating. Most significantly, this strategy is demonstrated to be effective for a blend system incorporating a low band-gap polymer. By adding only 10 wt% PC61BPF, the PDTBCDTB:PC71BM-based device exhibits thermally stable morphology and device characteristics. These findings demonstrate that smart utilization of supramolecular interactions is an effective and practical strategy to control morphological evolution. |
| Databáze: | OpenAIRE |
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