Introduction of technologies for perovskite/hetero-junction crystalline silicon tandem solar cells

Abstract

In the thrust to achieve carbon neutrality by 2050, tandem solar cells composed of perovskite and hetero-junction crystalline silicon solar cells have attracted much attention as next-generation solar cells, and their conversion efficiencies are approaching 30%. In this article, we show the latest results of the R&D activities for Kaneka’s 2-terminal tandem solar cells, which have a conversion efficiency of nearly 29%, and we discuss the light confinement technologies for tandem solar cells based on optical simulations. In addition, we also introduce 3-terminal tandem solar cells that have the potential to combine the state-of-the-art perovskite solar cells and Kaneka’s world-record holding back-contact-type hetero-junction crystalline silicon solar cells.