Graphene And Its Derivatives for Organic Solar Cells

Abstract

Organic solar cells (OSCs) have attracted extensive research interest due to the low-cost, flexibility, customizability, environmental friendly, and broad spectral response. Electrode materials are one of the key factors affecting the chemical performance of OSCs. Finding electrode materials with high photoelectric conversion and stable structure is crucial to promote the development of OSCs. Graphene is a two-dimensional material with special structure and excellent properties. It can be used as an electrode material or conductive additive for OSCs. The integrating of graphene derivatives has been proved to be an effective strategy to improve the performance of OSCs. Graphene oxide, reduced graphene oxide, and functionalized graphene are contribute to increase the photovoltaic conversion efficiency, enhance light absorption, and improve the carrier transport. In this paper, OSCs and graphene are introduced firstly. The latest progresses in the research of OSCs and graphene are summarized respectively. In addtion, applications of graphene and its derivatives are discussed in OSCs. The preparation methods of electrodes are discussed. The photoelectric conversion rate and electrode stability of these OSCs are enhanced significantly. Finally, the challenges and future directions of graphene in OSCs are summarized. The current problems of graphene, such as the integrity of graphene, scalability, and cost-effectiveness, are presented. Developing novel graphene derivatives, exploring applications of graphene hybird with other materials, and improving the preparation process of graphene will help to promote the development of this field.