The effect of three-dimensional morphology on the efficiency of hybrid polymer solar cells
The efficiency of polymer solar cells critically depends on the intimacy of mixing of the donor and acceptor semiconductors used in these devices to create charges and on the presence of unhindered percolation pathways in the individual components to transport holes and electrons. The visualization...
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| Veröffentlicht in: | Nature materials 2009-10, Vol.8 (10), p.818-824 |
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| creator | Janssen, René A. J Oosterhout, Stefan D Wienk, Martijn M van Bavel, Svetlana S Thiedmann, Ralf Jan Anton Koster, L Gilot, Jan Loos, Joachim Schmidt, Volker |
| description | The efficiency of polymer solar cells critically depends on the intimacy of mixing of the donor and acceptor semiconductors used in these devices to create charges and on the presence of unhindered percolation pathways in the individual components to transport holes and electrons. The visualization of these bulk heterojunction morphologies in three dimensions has been challenging and has hampered progress in this area. Here, we spatially resolve the morphology of 2%-efficient hybrid solar cells consisting of poly(3-hexylthiophene) as the donor and ZnO as the acceptor in the nanometre range by electron tomography. The morphology is statistically analysed for spherical contact distance and percolation pathways. Together with solving the three-dimensional exciton-diffusion equation, a consistent and quantitative correlation between solar-cell performance, photophysical data and the three-dimensional morphology has been obtained for devices with different layer thicknesses that enables differentiating between generation and transport as limiting factors to performance.
The performance of hybrid solar cells depends critically on the morphology of both the polymeric and the inorganic components. Electron tomography is used to resolve the morphology in three dimensions; coupling this information with three-dimensional exciton-diffusion studies enables the differentiation of charge generation and transport as performance-limiting factors. |
| doi_str_mv | 10.1038/nmat2533 |
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The performance of hybrid solar cells depends critically on the morphology of both the polymeric and the inorganic components. 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The performance of hybrid solar cells depends critically on the morphology of both the polymeric and the inorganic components. Electron tomography is used to resolve the morphology in three dimensions; coupling this information with three-dimensional exciton-diffusion studies enables the differentiation of charge generation and transport as performance-limiting factors.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>19749766</pmid><doi>10.1038/nmat2533</doi><tpages>7</tpages></addata></record> |
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| subjects | Biomaterials Chemistry and Materials Science Condensed Matter Physics Limiting factors Materials Science Nanomaterials Nanotechnology Optical and Electronic Materials Percolation Photovoltaic cells Polymers Semiconductors Solar cells |
| title | The effect of three-dimensional morphology on the efficiency of hybrid polymer solar cells |
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