Inverting the organic solar cell

Abstract

The immediate requirement to reduce Green House Gas emissions and the diminishing petroleum reserves are forcing the world to switch into greener sources of energy. Organic Solar Cells are one of the most impressive solutions for the clean energy demands. They have interesting advantages which can be translate into potential applications in the future. It is due to this reason, that efforts to improve both the efficiency and stability of OSCs are garnering worldwide attention. But the conventional architecture has crippling disadvantages which impacts the performance of OSCs. This has led to a growing interest in OSCs with inverted architecture-a structure with the transparent electrode acting as cathode and high work function metal as anode. This review will go over the existing mechanisms and researches taking place in the fabrication of Inverted OSCs.

Scaling-Up of Solution-Processable Tungsten Trioxide (WO3) Nanoparticles as a Hole Transport Layer in Inverted Organic Photovoltaics

“…Additionally, these structures offer superior stability in ambient conditions since metal anodes can be deposited from commercially available colloidal solutions [30]. In contrast, the direct architecture typically employs low work-function metals like LiF/Al or Ca/Al, which can be easily oxidized in air [30,32]. The thermal evaporation of the top electrodes can create micropores in the top metal electrode, allowing oxygen and moisture to penetrate the photoactive layer, causing rapid polymer degradation and decreasing solar device stability.…”