Статья

Porphyrin-Sensitized Solar Cells with Cobalt (II/III)–Based Redox Electrolyte Exceed 12 Percent Efficiency

Aswani YellaLaboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne-1015, SwitzerlandHsuan‐Wei LeeDepartment of Chemistry and Center of Nanoscience and Nanotechnology, National Chung Hsing University, Taichung, Taiwan 402, ROCHoi Nok TsaoLaboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne-1015, SwitzerlandChenyi YiLaboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne-1015, SwitzerlandAravind Kumar ChandiranLaboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne-1015, SwitzerlandMohammad Khaja NazeeruddinLaboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne-1015, SwitzerlandEric Wei‐Guang DiauDepartment of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu, Taiwan 300, ROCChen‐Yu YehDepartment of Chemistry and Center of Nanoscience and Nanotechnology, National Chung Hsing University, Taichung, Taiwan 402, ROCShaik M. ZakeeruddinLaboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne-1015, SwitzerlandMichaël GrätzelLaboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne-1015, Switzerland

2011en

ABI

Аннотация

The iodide/triiodide redox shuttle has limited the efficiencies accessible in dye-sensitized solar cells. Here, we report mesoscopic solar cells that incorporate a Co((II/III))tris(bipyridyl)-based redox electrolyte in conjunction with a custom synthesized donor-π-bridge-acceptor zinc porphyrin dye as sensitizer (designated YD2-o-C8). The specific molecular design of YD2-o-C8 greatly retards the rate of interfacial back electron transfer from the conduction band of the nanocrystalline titanium dioxide film to the oxidized cobalt mediator, which enables attainment of strikingly high photovoltages approaching 1 volt. Because the YD2-o-C8 porphyrin harvests sunlight across the visible spectrum, large photocurrents are generated. Cosensitization of YD2-o-C8 with another organic dye further enhances the performance of the device, leading to a measured power conversion efficiency of 12.3% under simulated air mass 1.5 global sunlight.

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Идентификаторы

DOI: 10.1126/science.1209688

Цитирования и источники

Цитирований: 4Использованных источников: 0

Показатели — AkademScholar