Graphene OPV Manufacturing Process (image) University of Southern California Caption A flow of methane and hydrogen gas mixture deposits carbon atoms as graphene on a nickel plate. The graphene later is then transferred to a plastic sheet, which is then incorporated into an organic photo voltaic (OPV) cell. Credit USC Viterbi School of Engineering Usage Restrictions must credit Viterbi School of Engineering Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.