Maximizing Performance and Stability of Organic Solar Cells at Low Driving Force for Charge Separation.

ABSTRACT: Thanks to the development of novel electron acceptor materials, the power conversion efficiencies (PCE) of organic photovoltaic (OPV) devices are now approaching 20%. Further improvement of PCE is complicated by the need for a driving force to split strongly bound excitons into free charges, causing voltage losses. This review discusses recent approaches to finding efficient OPV systems with minimal driving force, combining near unity quantum efficiency (maximum short circuit currents) with optimal energy efficiency (maximum open circuit voltages). The authors discuss apparently contradicting results on the amount of exciton binding in recent literature, and approaches to harmonize the findings. A comprehensive view is then presented on motifs providing a driving force for charge separatio

SUBMITTER: Luer L 

PROVIDER: S-EPMC10853714 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature