[22a-C601-1~11] 12.5 Organic and hybrid solar cells

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[22a-C601-10] Graded-Composition Thin Films of Metal Halide Perovskite-Type Semiconductor CsSn_xPb_1-xBr₃

Ren Sasaki¹, Daisuke Nakamura¹, Zihao Liu¹, 〇Masato Soutome², Takashi Kondo^1,2 (1.Fac. Eng. U.Tokyo, 2.RCAST U. Tokyo)

Keywords:

perovskite solar-cell,vapor deposition,graded-composition thin Film

If a heterostructure or composition gradient can be introduced into perovskite solar cells, it is expected that we can improve the photoelectric conversion efficiency by increasing the open-circuit voltage and short-circuit current. Taking into account that there is a large bowing in the composition dependence of the band gap of CsSn_xPb_1-xBr₃, we fabricated solar cells with its composition controlled to have a linear gradient band gap. Based on the results of XRD, photoabsorption, AFM, I-V characteristics, the crystallinity, optical properties, and stability under light irradiation, physical properties of the graded-composition structure will also be discussed.