14:30 〜 15:00
[D-1-02 (Invited)] Perovskite Solar Cells Consisting of Sn and All-perovskite Tandem Solar Cells
The halide perovskite solar cells consisting of Tin (Sn-PVKs)) can cover the wide wavelength up to 1.25 eV and are characterized as the narrow bandgap halide perovskite, which is not realized by the conventional lead halide perovskite solar cells (Pb-PCK PV). The theoretical efficiency of the Sn-PVK PV with 1.2-1.4 eV is higher than that of Pb-PVK PV from the viewpoint of SQ limit. In addition, SnPb alloyed perovskite solar cells with the band gap of 1.25 eV is expected as the bottom cell of the all-perovskite tandem solar cells with high efficiency reaching 30%. The efficiency of Pb free Sn-PVK PV (14-15%), SnPb-alloyed PVK PV (23:24%) and all-perovskite tandem solar cells (26-28%) are reviewed.