title: Influence of structural variations in push-pull zinc porphyrins on photovoltaic performance of dye-sensitized solar cells.
abstract: We designed and synthesized two new zinc porphyrin dyes for dye-sensitized solar cells (DSCs). Subtle molecular structural variation in the dyes significantly influenced the performance of the DSC devices. By utilizing these dyes in combination with a cobalt-based redox electrolyte using a photoanode made of mesoporous TiO2 , we achieved a power conversion efficiency (PCE) of up to 12.0 % under AM 1.5 G (100 mW cm(-2)) simulated solar light. Moreover, we obtained a high PCE of 6.4 % for solid-state dye-sensitized solar cells by using 2,2',7,7'-tetrakis-(N,N-di-p-methoxyphenylamine)-9,9'-spirobifluorene as a hole-transporting material.
authors.affiliation: Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne (Switzerland).
authors.forename: Chenyi
authors.initials: C
authors.lastname: Yi
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Giordano
authors.forename: Ngoc-Le
authors.initials: NL
authors.lastname: Cevey-Ha
authors.forename: Hoi Nok
authors.initials: HN
authors.lastname: Tsao
authors.forename: Shaik M
authors.initials: SM
authors.lastname: Zakeeruddin
authors.forename: Michael
authors.initials: M
authors.lastname: Grätzel
mesh_terms: D004396:Coloring Agents / Q000737:chemistry*; D011211:Electric Power Supplies; D008665:Metalloporphyrins / Q000737:chemistry*; D012993:Solar Energy; D015032:Zinc / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D008665:Metalloporphyrins; D015032:Zinc
keywords: cobalt; dye-sensitized solar cells; porphyrins; structure-activity relationships; titanium oxide