title: Soluble P3HT-grafted graphene for efficient bilayer-heterojunction photovoltaic devices.
abstract: CH(2)OH-terminated regioregular poly(3-hexylthiophene) (P3HT) was chemically grafted onto carboxylic groups of graphene oxide (GO) via esterification reaction. The resultant P3HT-grafted GO sheets (G-P3HT) are soluble in common organic solvents, facilitating the structure/property characterization and the device fabrication by solution processing. The covalent linkage and the strong electronic interaction between the P3HT and graphene moieties in G-P3HT were confirmed by spectroscopic analyses and electrochemical measurements. A bilayer photovoltaic device based on the solution-cast G-P3HT/C(60) heterostructures showed a 200% increase of the power conversion efficiency (η = 0.61%) with respect to the P3HT/C(60) counterpart under AM 1.5 illumination (100 mW/cm(2)).
authors.affiliation: Department of Chemical Engineering, Case Western Reserve University, Cleveland, Ohio 44106, USA.
authors.forename: Dingshan
authors.initials: D
authors.lastname: Yu
authors.forename: Yan
authors.initials: Y
authors.lastname: Yang
authors.forename: Michael
authors.initials: M
authors.lastname: Durstock
authors.forename: Jong-Beom
authors.initials: JB
authors.lastname: Baek
authors.forename: Liming
authors.initials: L
authors.lastname: Dai
mesh_terms: D004563:Electrochemistry / Q000379:methods; D004581:Electronics; D004867:Equipment Design; D037741:Fullerenes / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D018625:Microscopy, Atomic Force / Q000379:methods; D036103:Nanotechnology / Q000379:methods; D010100:Oxygen / Q000737:chemistry; D010777:Photochemistry / Q000379:methods*; D012997:Solvents / Q000737:chemistry; D013053:Spectrophotometry / Q000379:methods; D014466:Ultraviolet Rays
chemical_list: D037741:Fullerenes; D012997:Solvents; D006108:Graphite; C069837:fullerene C60; D010100:Oxygen