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      Beyond Efficiency: the Challenge of Stability in Mesoscopic Perovskite Solar Cells

      , , , ,

      Advanced Energy Materials

      Wiley-Blackwell

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          Dye-sensitized solar cells.

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            Porphyrin-sensitized solar cells with cobalt (II/III)-based redox electrolyte exceed 12 percent efficiency.

            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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              Synthesis and crystal chemistry of the hybrid perovskite (CH3NH3)PbI3 for solid-state sensitised solar cell applications

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                Author and article information

                Journal
                Advanced Energy Materials
                Adv. Energy Mater.
                Wiley-Blackwell
                16146832
                October 2015
                October 2015
                : 5
                : 20
                : 1501066
                Article
                10.1002/aenm.201501066
                © 2015
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