▎ 摘　　要

In the 21st century, photovoltaic (PV) is an emerging renewable energy source. According to its low production cost, organic solar cells (OSCs) exhibit huge potential in the commercialization market. Low-dimensional carbon nanomaterials with superb electronic, optical, mechanical properties have been proposed to serve as different functions in organic solar cells. In this paper, we systematically summarize the progress of carbon nanotube (CNT)- and graphene-based OSCs, including the photoactive, electrode and interfacial layers. It concludes that CNTs and graphene can play a crucial role in OSCs. Also, this review provides a summary and outlook on improving the performance of OSCs. At present, the device is in the direction of the hybrid system, high power conversion efficiency (PCE) and long lifetimes.