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Highly Efficient Organic Sensitizers for Solid-State Dye-Sensitized Solar Cells

2009; American Chemical Society; Volume: 113; Issue: 38 Linguagem: Inglês

10.1021/jp9033722

1932-7455

Soo‐Jin Moon, Jun‐Ho Yum, Robin Humphry‐Baker, Karl Martin Karlsson, Daniel P. Hagberg, Tannia Marinado, Anders Hagfeldt, Licheng Sun, Michaël Grätzel, Mohammad Khaja Nazeeruddin,

Photochromic and Fluorescence Chemistry

Organic sensitizers comprising of donor, electron-conducting, and anchoring groups are designed and developed for dye-sensitized solar cell applications. A solar cell employing 3-(5′-{4-[bis-(4-hexyloxy-phenyl)-amino]-phenyl}-[2,2′]bithiophenyl-5-yl)-2-cyano-acrylic acid dye spiro-OMeTAD as a hole-transporting material exhibits a short circuit photocurrent density of 9.64 mA/cm2, an open-circuit voltage of 798 mV, and a fill factor of 0.57, corresponding to an overall conversion efficiency of 4.4% at standard AM 1.5 sunlight. Photoinduced absorption spectroscopy probes an efficient hole-transfer from dyes to the spiro-OMeTAD.