Abstract
Graphene oxides are prepared under various pH values and their photovoltaic performance is evaluated using conventional organic photovoltaic devices. Acidic pH values demonstrated graphene oxide with more oxygen-functional groups and lower surface areas but with broader pore size distributions than those in basic medium. The pristine graphene oxide organic photovoltaic shows slightly better photovoltaic performance mainly due to high short-circuit current density, while the graphene produced under neutral or acidic conditions are slightly less efficient.
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