title: Chemical Vapor Deposited Graphene-Based Derivative As High-Performance Hole Transport Material for Organic Photovoltaics.
abstract: The development of efficient charge transport layers is a key requirement for the fabrication of efficient and stable organic solar cells. A graphene-based derivative with planar resistivity exceeding 10(5) Ω/□ and work function of 4.9 eV is here produced by finely tuning the parameters of the chemical vapor deposition process on copper. After the growth, the film is transferred to glass/indium tin oxide and used as hole transport layer in organic solar cells based on a PBDTTT-C-T:[70]PCBM blend. The cells attained a maximum power conversion efficiency of 5%, matching reference cells made with state-of-the-art
  PSS as the hole transport layer. Our results indicate that functionalized graphene could represent an effective alternative to
  PSS as hole transport/electron blocking layer in solution-processed organic photovoltaics.
authors: ENEA , Laboratorio Materiali e Processi Fisico-Chimici, Casaccia Research Centre, Via Anguillarese 301, Rome 00060, Italy.|Istituto Italiano di Tecnologia , Graphene Labs, Via Morego 30, Genova 16163, Italy.
authors: Andrea
authors: A
authors: Capasso
authors: Istituto Superiore delle Comunicazioni e delle Tecnologie dell'Informazione (ISCOM), Ministero dello Sviluppo Economico , Viale America 201, Rome 00144, Italy.|Department of Electronic Engineering, University of Rome "Tor Vergata" , Via del Politecnico 1, Rome 00133, Italy.
authors: Luigi
authors: L
authors: Salamandra
authors: Dipartimento di Ingegneria dell'Informazione, delle Infrastrutture e dell'Energia Sostenibile (DIIES), Università "Mediterranea" di Reggio Calabria , Reggio, Calabria 89122, Italy.
authors: Giuliana
authors: G
authors: Faggio
authors: ENEA , Laboratorio Materiali e Processi Fisico-Chimici, Casaccia Research Centre, Via Anguillarese 301, Rome 00060, Italy.
authors: Theodoros
authors: T
authors: Dikonimos
authors: ENEA , Laboratorio Materiali e Processi Fisico-Chimici, Casaccia Research Centre, Via Anguillarese 301, Rome 00060, Italy.
authors: Francesco
authors: F
authors: Buonocore
authors: CNR-IMM Bologna , Via Gobetti, 101, Bologna 40129, Italy.
authors: Vittorio
authors: V
authors: Morandi
authors: CNR-IMM Bologna , Via Gobetti, 101, Bologna 40129, Italy.
authors: Luca
authors: L
authors: Ortolani
authors: ENEA , Laboratorio Materiali e Processi Fisico-Chimici, Casaccia Research Centre, Via Anguillarese 301, Rome 00060, Italy.
authors: Nicola
authors: N
authors: Lisi
keywords: ethanol CVD; functionalized graphene film; graphene-based derivative; hole transport layer; organic photovoltaics