title: Integrating a triplet-triplet annihilation up-conversion system to enhance dye-sensitized solar cell response to sub-bandgap light.
abstract: The poor response of dye-sensitized solar cells (DSCs) to red and infrared light is a significant impediment to the realization of higher photocurrents and hence higher efficiencies. Photon up-conversion by way of triplet-triplet annihilation (TTA-UC) is an attractive technique for using these otherwise wasted low energy photons to produce photocurrent, while not interfering with the photoanodic performance in a deleterious manner. Further to this, TTA-UC has a number of features, distinct from other reported photon up-conversion technologies, which renders it particularly suitable for coupling with DSC technology. In this work, a proven high performance TTA-UC system, comprising a palladium porphyrin sensitizer and rubrene emitter, is combined with a high performance DSC (utilizing the organic dye D149) in an integrated device. The device shows an enhanced response to sub-bandgap light over the absorption range of the TTA-UC sub-unit resulting in the highest figure of merit for up-conversion assisted DSC performance to date.
authors.affiliation: ARC Centre of Excellence for Electromaterials Science (ACES), Intelligent Polymer Research Institute (IPRI), The University of Wollongong.
authors.forename: Andrew
authors.initials: A
authors.lastname: Nattestad
authors.affiliation: School of Chemistry, The University of Sydney.
authors.forename: Yuen Yap
authors.initials: YY
authors.lastname: Cheng
authors.affiliation: School of Chemistry, The University of Sydney.
authors.forename: Rowan W
authors.initials: RW
authors.lastname: MacQueen
authors.affiliation: ARC Centre of Excellence for Electromaterials Science (ACES), Intelligent Polymer Research Institute (IPRI), The University of Wollongong.
authors.forename: Gordon G
authors.initials: GG
authors.lastname: Wallace
authors.affiliation: School of Chemistry, The University of New South Wales; t.schmidt@unsw.edu.au.
authors.forename: Timothy W
authors.initials: TW
authors.lastname: Schmidt
mesh_terms: D004396:Coloring Agents / Q000737:chemistry*; D017785:Photons; D012993:Solar Energy
chemical_list: D004396:Coloring Agents