All-polymer solar cells: materials and devices

Abstract

<p indent="0mm">Recently, organic solar cells (OSCs) have achieved rapid advance and the power conversion efficiency (PCE) of non-fullerene small molecular acceptors-based OSCs has exceeded 20%. All-polymer solar cells with blending active layer of polymer donors and polymer acceptors have attracted tremendous interest due to their outstanding advantages such as superior morphological and mechanical stability, which show great potential in large-area and flexible devices. With the emergence of various novel polymer donors/acceptors as well as the development of device architectures, the PCE of all-polymer solar cells has exceeded 18%. Nevertheless, compared with the non-fullerene small molecular acceptors-based OSCs, all-polymer solar cells encounter several problems, including relatively inferior device efficiency, batch-to-batch variation of the performance of polymer acceptors/donors. Therefore, it is still challenging to explore high-performance polymer donors/acceptors and prepare highly efficient devices. This review will pay attention to the development of polymer donors/acceptors, device manufacturing and interfacial layer engineering through systematically summarizing the recent representative literatures in this field, which will eventually provide prospects on the future development of materials and devices of all-polymer solar cells.