[14a-A34-1~7] 13.10 Compound solar cells

△ [14a-A34-6] Defect Formation Energy in the Perovskite Semiconductor CsSnI₃

〇Tatsuya Nakase¹, Shinya Hikari², Akira Masago^1,2, Tetsuya Fukushima³, Kazunori Sato⁴, Hiroshi Katayama-Yoshida^1,2 (1.Osaka Univ., 2.CSRN, Osaka Univ., 3.INSD, Osaka Univ., 4.Eng., Osaka Univ.)

Keywords:New Type Solar Cells

The perovskite semiconductor CH₃NH₃PbI₃ has attracted much attention as a material of inexpensive and high-efficient next-generation solar cells, but another material is requested because the material involves a fragile component part of CH₃NH₃ and a toxic element of Pb. CsSnI₃ is a strong candidate. The energy conversion efficiency is 10.2% in 2012. Toward lower cost and higher efficiency, we investigate defects in this system using the first principles calculations. Finally we design strong materials of the low-cost and high-efficiency solar cells.