Efficient inverted polymer solar cells employing favourable molecular orientation
| Autor: | Takeshi Kakara, Kazuo Takimiya, Varun Vohra, Tomoyuki Koganezawa, Kazuaki Kawashima, Hideyuki Murata, Itaru Osaka |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
chemistry.chemical_classification
Materials science Efficient inverted polymer solar cells integumentary system business.industry food and beverages Polymer Hybrid solar cell Orientation (graph theory) Quantum dot solar cell Atomic and Molecular Physics and Optics Polymer solar cell Electronic Optical and Magnetic Materials chemistry Optical materials biological sciences Optoelectronics business single-junction inverted cells |
| Zdroj: | Nature Photonics. 9:403-408 |
| ISSN: | 1749-4885 |
| Popis: | The improvement in the power conversion efficiency is a critical issue for polymer-based bulk-heterojunction solar cells (PSCs). Here, we show that high efficiencies of ~10% can be obtained by using a crystalline polymer, PNTz4T, in single-junction inverted cells with the thick active layer measuring ca. 300 nm. The improved performance is likely due to the large population of the polymer crystallites with the face-on orientation and the “favourable” distribution of edge-on and face-on crystallites along the film thickness, as revealed by in-depth studies of the blend films using grazing incidence wide angle X-ray diffraction, which results in the reduction of charge recombination and the efficient charge transport. These results underscore the great promise of PSCs, and raise hopes of achieving even higher efficiencies by materials development and control of molecular ordering. |
| Databáze: | OpenAIRE |
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