Abstract
The use of a ternary component is a facile and effective method to further improve the device performances of binary organic solar cells (OSCs) comprising one donor and one acceptor. Recently, the rapid progress of highly efficient nonfullerene acceptor materials has offered a new opportunity for studying ternary OSCs because of the flexibility of ternary components, and the photovoltaic performance of ternary OSCs has been promoted quickly. In this research news article, some strategies for materials selection of the ternary components are concisely summarized and the recent progress in ternary OCSs based on nonfullerene acceptors, and the challenges and perspectives of ternary OSCs are also presented.
Fullerene-free ternary organic solar cells integrating complementary absorptions are greatly inspired by the prosperous development of nonfullerene acceptors with their great performance and abundant varieties. This research news demonstrates the main functions of third components and some design guidelines for ternary composition and summarizes the recent advanced progress for high-performance ternary organic solar cells based on nonfullerene acceptors.