Stable >=8% efficient nanocrystalline dye-sensitized solar cell based on an electrolyte of low volatility

Wang, Peng; Klein, Cédric; Humphry-Baker, Robin; Zakeeruddin, Shaik M.; Grätzel, Michael
March 2005
Applied Physics Letters;3/21/2005, Vol. 86 Issue 12, p123508
Academic Journal
We demonstrate a >=8% efficient nanocrystalline dye-sensitized solar cell retaining over 98% of its initial performance after 1000 h of accelerated tests subjected to thermal stress at 80 °C in the dark. Device degradation was also negligible following 1000 h of visible light soaking at 60 °C. This high performance and stable device was realized by using a robust electrolyte of low volatility in conjunction with the amphiphilic ruthenium sensitizer [Ru(4,4′-dicarboxylic acid-2,2′-bipyridine)(4,4′-bis(p-hexyloxystyryl)-2,2′-bipyridine)(NCS)2], coded as K-19, which was grafted together with 1-decylphosphonic acid on the mesoporous titania film acting as photoanode.


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