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Pablo Docampo, Andrew Hey, Stefan Guldin, Robert Gunning, Ullrich Steiner and Henry J. Snaith Pore Filling of Spiro-OMeTAD in Solid-State Dye-Sensitized Solar Cells Determined Via Optical Reflectometry Advanced Functional Materials 22

Version of Record online: 23 JUL 2012 | DOI: 10.1002/adfm.201201223

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A facile and accurate optical method for determining the pore-filling fraction of organic hole-transporters into mesoporous TiO2 photoanodes is described. Using this technique it is determined that maximum pore-filling fractions of up to 80% are achievable, and the long-held belief that pore-filling is the limiting factor to fabricate efficient thick (over 5 μm) devices, which is necessary to achieve optimum photovoltaic performance with standard dyes, is challenged.

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