[21a-D903-1~10] CS.13 Code-sharing Session of 12.5 & 13.9 & 16.3

9:00 AM - 9:15 AM JST(12:00 AM - 12:15 AM UTC)

[21a-D903-1] Wide-bandgap Perovskite Solar Cells for Multi-junction Solar Cells

〇Fumiyasu Awai¹, Yusuke Ohteki², Takashi Koida³, Maxime Giteau⁴, Stephane Collin⁴, Jean-Francois Guillemoles⁵, Yoshitaka Okada², Takaya Kubo², Hiroshi Segawa^1,2 (1.UTokyo Arts & Sci., 2.UTokyo RCAST, 3.AIST, 4.CNRS-C2N, 5.CNRS-IPVF)

Keywords:

Perovskite Solar Cells

Perovskite solar cells are one of the most actively studied next-generation solar cells and also can be used as sub-cells in multi-tandem solar cells because of their easily tunable bandgaps. Perovskite tandem cells have been reported using different types of solar cells, including Si solar cells and organic solar cells. Here we develop a wide bandgap perovskite solar cell for perovskite/GaAs tandem solar cells. Using optical simulation techniques, we estimate the optimal bandgap for perovskite solar cells and fabricate prototype monolithic 2-junction perovskite/GaAs solar cells based on this estimation. Perovskite solar cells with different bandgaps were fabricated by changing the ratio of anions. The measured currents showed the same bandgap dependence as the calculated results. 2-terminal quasi-tandem solar cells were fabricated and higher efficiencies than the perovskite and GaAs sub-cells were obtained near the calculated optimal bandgap.