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Improved performance of porphyrin-based dye sensitised solar cells by phosphinic acid surface treatment

Allegrucci, Alessandra and Lewcenko, Naomi A. and Mozer, Attila J. and Dennany, Lynn and Wagner, Pawel and Officer, David L. and Sunahara, Kenji and Mori, Shogo and Spiccia, Leone (2009) Improved performance of porphyrin-based dye sensitised solar cells by phosphinic acid surface treatment. Energy & Environmental Science, 2 (10). pp. 1069-1073. ISSN 1754-5692

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Abstract

Chemical surface treatment of porphyrin-sensitised titania films using bis-(4-methoxyphenyl) phosphinic acid after dye adsorption, results in large improvements in DSSC efficiencies which originate primarily from higher short circuit currents. The result was attributed to a positive shift in the TiO2 quasi-Fermi level with simultaneous retardation of charge recombination. High device performances have been achieved even using simplified electrolyte matrices devoid of the common additives, LiI and t-butylpyridine.