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[×ÊÔ´] Nature×îÐÂÑо¿½øÕ¹£º¸ßЧȫ¹Ì̬ȾÁÏÃô»¯Ì«ÑôÄܵç³Ø

×îÐÂÒ»ÆÚNatureÔÓÖ¾±¨µ¼ÁË×îеÄÑо¿½øÕ¹---¸ßЧȫ¹Ì̬ȾÁÏÃô»¯Ì«ÑôÄܵç³Ø£¬×ª»¯Ð§ÂÊ´ïµ½10.2%¡£
ÉÏ´«ÎÄÕÂÕýÎĺÍSupporting¹©´ó¼Ò²Î¿¼~

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Dye-sensitized solar cells based on titanium dioxide (TiO2) are
promising low-cost alternatives to conventional solid-state photovoltaic
devices based on materials such as Si, CdTe and
CuIn12xGaxSe2 (refs 1, 2). Despite offering relatively high conversion
efficiencies for solar energy, typical dye-sensitized solar cells
suffer from durability problems that result from their use of
organic liquid electrolytes containing the iodide/tri-iodide redox
couple, which causes serious problems such as electrode corrosion
and electrolyte leakage3. Replacements for iodine-based liquid
electrolytes have been extensively studied, but the efficiencies of
the resulting devices remain low3¨C9. Here we show that the solutionprocessable
p-type direct bandgap semiconductor CsSnI3 can be
used for hole conduction in lieu of a liquid electrolyte. The resulting
solid-state dye-sensitized solar cells consist of CsSnI2.95F0.05
doped with SnF2, nanoporous TiO2 and the dye N719, and show
conversion efficiencies of up to 10.2 per cent (8.51 per cent with a
mask). With a bandgap of 1.3 electronvolts, CsSnI3 enhances
visible light absorption on the red side of the spectrum to outperform
the typical dye-sensitized solar cells in this spectral region.
.



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