title: Graphene-based large area dye-sensitized solar cell modules.
abstract: We demonstrate spray coating of graphene ink as a viable method for large-area fabrication of graphene-based dye-sensitized solar cell (DSSC) modules. A graphene-based ink produced by liquid phase exfoliation of graphite is spray coated onto a transparent conductive oxide substrate to realize a large area (>90 cm(2)) semi-transparent (transmittance 44%) counter-electrode (CE) replacing platinum, the standard CE material. The graphene-based CE is successfully integrated in a large-area (43.2 cm(2) active area) DSSC module achieving a power conversion efficiency of 3.5%. The approach demonstrated here paves the way to all-printed, flexible, and transparent graphene-based large-area and cost-effective photovoltaic devices on arbitrary substrates.
authors.affiliation: CHOSE - Center for Hybrid and Organic Solar Energy, Dept. Electr. Eng. University of Rome "Tor Vergata", via del Politecnico 1, 00133, Rome, Italy.
authors.forename: Simone
authors.initials: S
authors.lastname: Casaluci
authors.affiliation: Center for Nanotechnology Innovation@NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, 56127 Pisa, Italy.
authors.forename: Mauro
authors.initials: M
authors.lastname: Gemmi
authors.affiliation: Istituto Italiano di Tecnologia, Graphene Labs, Via Morego 30, 16163 Genova, Italy. francesco.bonaccorso@iit.it.
authors.forename: Vittorio
authors.initials: V
authors.lastname: Pellegrini
authors.affiliation: CHOSE - Center for Hybrid and Organic Solar Energy, Dept. Electr. Eng. University of Rome "Tor Vergata", via del Politecnico 1, 00133, Rome, Italy.
authors.forename: Aldo
authors.initials: A
authors.lastname: Di Carlo
authors.affiliation: Istituto Italiano di Tecnologia, Graphene Labs, Via Morego 30, 16163 Genova, Italy. francesco.bonaccorso@iit.it.
authors.forename: Francesco
authors.initials: F
authors.lastname: Bonaccorso