標題: Porphyrin-Sensitized Solar Cells with Cobalt (II/III)-Based Redox Electrolyte Exceed 12 Percent Efficiency
作者: Yella, Aswani
Lee, Hsuan-Wei
Tsao, Hoi Nok
Yi, Chenyi
Chandiran, Aravind Kumar
Nazeeruddin, Md. Khaja
Diau, Eric Wei-Guang
Yeh, Chen-Yu
Zakeeruddin, Shaik M.
Graetzel, Michael
應用化學系
應用化學系分子科學碩博班
Department of Applied Chemistry
Institute of Molecular science
公開日期: 4-十一月-2011
摘要: 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-pi-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.
URI: http://dx.doi.org/10.1126/science.1209688
http://hdl.handle.net/11536/14663
ISSN: 0036-8075
DOI: 10.1126/science.1209688
期刊: SCIENCE
Volume: 334
Issue: 6056
起始頁: 629
結束頁: 634
顯示於類別:期刊論文


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