Investigation of charge transfer properties in MEHPVV and rGO-AA nanocomposites for Green organic photovoltaic application

Abstract

The rapid ascension in conjugated polymer-based organic electronic device applications is of highest concern and explored with utmost interest. They own distinct properties such as efficient dissociation in exciton pairs and better charge transfer capabilities that lead to an enhanced separation of exciton at the donor: acceptor interface. Therefore, an appropriate selection of donor and acceptor species is required for the development of an efficient organic solar cell device. In this work, an organic nanocomposite-based system in which conductive polymer MEHPPV poly[2–methoxy–5–(2–ethylhexyloxy)–1,4–phenylenevinylene] acts as an electron donor and green route reduced graphene oxide (rGO) via L-Ascorbic Acid (L-AA) as an acceptor material has been materialised for the photovoltaic energy conversion. The validation of charge-transfer properties in rGO-AA blended with conducting MEHPPV has been investigated using photoluminescence quenching phenomena and UV visible spectroscopy techniques. However, the reduction of GO is confirmed using X-ray diffraction, Raman spectroscopy, and morphology via scanning electron microscopy. The current-voltage characteristics reveal that the charge transfer occurred and an efficiency of 0.084 % has been noticed which confirms the utilisation of rGO-AA as an acceptor material for the development of green optoelectronic devices.