Affiliation:
1. Optoelectronics of Disordered Semiconductors Institute of Physics and Astronomy University of Potsdam D‐14476 Potsdam‐Golm Germany
2. Paul‐Drude‐Institut für Festkörperelektronik Leibniz‐Institut im Forschungsverbund Berlin e.V. 10117 Berlin Germany
3. Centre for Polymers and Organic Solids University of California Santa Barbara CA 93106 USA
4. College of Chemistry and Chemical Engineering Central South University Changsha 410083 P. R. China
5. Soft Matter Physics and Optoelectronics Institute of Physics and Astronomy University of Potsdam D‐14476 Potsdam‐Golm Germany
Abstract
AbstractOver the past three years, remarkable advancements in organic solar cells (OSCs) have emerged, propelled by the introduction of Y6—an innovative A‐DA'D‐A type small molecule non‐fullerene acceptor (NFA). This review provides a critical discussion of the current knowledge about the structural and physical properties of the PM6:Y6 material combination in relation to its photovoltaic performance. The design principles of PM6 and Y6 are discussed, covering charge transfer, transport, and recombination mechanisms. Then, the authors delve into blend morphology and degradation mechanisms before considering commercialization. The current state of the art is presented, while also discussing unresolved contentious issues, such as the blend energetics, the pathways of free charge generation, and the role of triplet states in recombination. As such, this review aims to provide a comprehensive understanding of the PM6:Y6 material combination and its potential for further development in the field of organic solar cells. By addressing both the successes and challenges associated with this system, this review contributes to the ongoing research efforts toward achieving more efficient and stable organic solar cells.
Funder
National Natural Science Foundation of China
Office of Naval Research
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science