Four‐Terminal Tandem Based on a PM6:L8‐BO Transparent Solar Cell and a 7 nm Ag Layer Intermediate Electrode

Organic Solar Cells In article number 2300728, Bernal-Texca and Martorell report the design and fabrication of a four-terminal tandem organic solar cell. Such a device is composed of a PM6:L8-BO transparent front cell with an ultrathin Ag electrode of only 7 nm and a low bandgap rear cell. A 16.94% power conversion efficiency was achieved when these two cells were configured in a four-terminal device separated by a WO3/LiF/WO3 multilayer, providing an optimal light distribution between the two cells.