Soluble P3HT-grafted graphene for efficient bilayer-heterojunction photovoltaic devices.
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)).
Yu
Dingshan
D
Department of Chemical Engineering, Case Western Reserve University, Cleveland, Ohio 44106, USA.
Yang
Yan
Y
Durstock
Michael
M
Baek
Jong-Beom
JB
Dai
Liming
L
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
D037741:Fullerenes; D012997:Solvents; D006108:Graphite; C069837:fullerene C60; D010100:Oxygen