Improved Stability of Organic Photovotlaic Devices With FeCl3 Intercalated Graphene Electrodes

Abstract

In this paper, we present the first organic photovoltaic (OPV) devices fabricated with FeCl3 intercalated few layer graphene (i-FLG) electrodes. i-FLG electrodes were first fabricated and characterized by electrical and spectroscopic means, showing enhanced conductive properties compared to pristine graphene. These electrodes were then used in the fabrication of OPV devices and tested against devices made with commercially available Indium Tin Oxide (ITO) electrodes. Both types of device achieved similar efficiencies, while the i-FLG based device exhibited superior charge transport properties due to the increase in work function characterizing i-FLG. Both types of device underwent a stability study using both periodic and continuous illumination measurements, which revealed i-FLG based OPVs to be significantly more stable than those based on ITO. These improvements are expected to translate to increased device lifetimes and a greater total energy payback from i-FLG based photovoltaic devices. These results highlight the potential benefits of using intercalated graphene materials as an alternative to ITO in photovoltaic devices.

Stability of Perovskite Solar Cells: Degradation Mechanisms and Remedies

“…Another alternative is transparent conductive oxides such as ITO or MoO 3 (Bush et al, 2016). Graphene-based electrodes have also been utilized to stabilize organic photovoltaic devices (Walsh et al, 2021). Those can produce stable devices but, whether conducting oxides or Carbon-based materials, the conductivities are much lower than that of metals.…”