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  • Title: Soluble P3HT-grafted graphene for efficient bilayer-heterojunction photovoltaic devices.
    Author: Yu D, Yang Y, Durstock M, Baek JB, Dai L.
    Journal: ACS Nano; 2010 Oct 26; 4(10):5633-40. PubMed ID: 20831214.
    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)).
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