[15p-K405-1~15] 12.5 Organic and hybrid solar cells

4:45 PM - 5:00 PM JST(7:45 AM - 8:00 AM UTC)

[15p-K405-14] Exploration of partially substituted structures in organic-inorganic perovskites

〇(M2)Kohei Takasaki¹, Qing Wang¹, Yuta Tsuji¹, Atsushi Wakamiya², Tomoya Nakamura², Satoshi Iikubo¹ (1.Kyushu Univ., 2.Kyoto Univ.)

Keywords:

perovskite,first-principles calculations,solar cell

In perovskite solar cells, the search for perovskite compounds that do not use toxic Pb is underway, and Sn has been identified as a candidate for an alternative element. However, tin perovskites have a problem in that defect levels in the band gap cause recombination between electrons and holes, resulting in a decrease in photoelectric conversion efficiency. The research group is investigating the control of orbital levels at the lower end of the conduction band (CBM) and the upper end of the valence band (VBM) of Sn perovskite by elemental substitution.