title: Grafting porphyrins (face-to-edge/orthogonal versus face-to-face/parallel) to ZnO en route toward dye-sensitized solar cells.
abstract: Novel types of binding motives have been investigated within the context of sensitizing ZnO-based dye-sensitized solar cells with metalloporphyrins. In particular, a complementary class of metalloporphyrin has been synthesized to probe the impact of a face-to-edge/orthogonal versus face-to-face/parallel orientation of the metalloporphyrin with respect to ZnO and has been compared to TiO(2)-based dye-sensitized solar cells. Our studies provide a deep and detailed understanding of the individual electron-transfer processes at the ZnO/metalloporphyrin interface, that is, electron injection, recombination, and dye regeneration, by means of steady-state and time-resolved techniques. Interestingly, we found that for our novel ZnO/metalloporphyrin systems, the injection efficiencies are close to unity, despite their long, nonconjugated anchoring group length.
authors.affiliation: Department of Chemistry and Pharmacy, Friedrich-Alexander-University Erlangen-Nuremberg, Egerlandstrasse 3, 91058 Erlangen, Germany. fabian.werner@chemie.uni-erlangen
authors.forename: Fabian
authors.initials: F
authors.lastname: Werner
authors.forename: Jan-Frederik
authors.initials: JF
authors.lastname: Gnichwitz
authors.forename: Renata
authors.initials: R
authors.lastname: Marczak
authors.forename: Emilio
authors.initials: E
authors.lastname: Palomares
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Peukert
authors.forename: Andreas
authors.initials: A
authors.lastname: Hirsch
authors.forename: Dirk M
authors.initials: DM
authors.lastname: Guldi