title: Atomic and electronic structures of interfaces in dye-sensitized, nanostructured solar cells.
abstract: Key processes in nanostructured dye-sensitized solar cells occur at material interfaces containing, for example, oxides, dye molecules, and hole conductors. A detailed understanding of interfacial properties is therefore important for new developments and device optimization. The implementation of X-ray-based spectroscopic methods for atomic-level understanding of such properties is reviewed. Specifically, the use of the chemical and element sensitivity of photoelectron spectroscopy, hard X-ray photoelectron spectroscopy, and resonant photoelectron spectroscopy for investigating interfacial molecular and electronic properties are described; examples include energy matching, binding configurations, and molecular orbital composition. Finally, results from the complete oxide/dye/hole-conductor systems are shown and demonstrate how the assembly itself can affect the molecular and electronic structure of the materials.
authors.affiliation: Physical Chemistry, Department Chemistry-Ångström, Uppsala University, SE-751 20 Uppsala (Sweden). erik.johansson@kemi.uu.se.
authors.forename: Erik M J
authors.initials: EM
authors.lastname: Johansson
authors.forename: Rebecka
authors.initials: R
authors.lastname: Lindblad
authors.forename: Hans
authors.initials: H
authors.lastname: Siegbahn
authors.forename: Anders
authors.initials: A
authors.lastname: Hagfeldt
authors.forename: Håkan
authors.initials: H
authors.lastname: Rensmo
keywords: dyes/pigments; interfaces; nanostructures; photoelectron spectroscopy; solar cells