Recent Progress of Organic Photovoltaics with Efficiency over 17%

The power conversion efficiency (PCE) of organic photovoltaics (OPVs) has exceeded 18% with narrow bandgap, non-fullerene materials Y6 or its derivatives when used as an electron acceptor. The PCE improvement of OPVs is due to strong photon harvesting in near-infrared light range and low energy loss. Meanwhile, ternary strategy is commonly recognized as a convenient and efficient means to improve the PCE of OPVs. In this review article, typical donor and acceptor materials in prepared efficient OPVs are summarized. From the device engineering perspective, the typical research work on ternary strategy and tandem structure is introduced for understanding the device design and materials selection for preparing efficient OPVs.

Automated summary

The review article summarizes the typical donor and acceptor materials in efficient organic photovoltaics (OPVs), with a focus on the use of Y6 or its derivatives as electron acceptors, which have led to power conversion efficiencies exceeding 18%. The article also highlights the importance of ternary strategy in improving PCE and introduces typical research work on ternary strategies and tandem structures for efficient OPV device design and material selection.