[21p-C601-1~23] 12.5 Organic and hybrid solar cells

6:30 PM - 6:45 PM JST(9:30 AM - 9:45 AM UTC)

[21p-C601-18] Phase Purity and Performance of Silver Bismuth Iodide Solar Cells and Impact of [Bi, I] Intermediate Complexes

〇Tsutomu Miyasaka¹, Natalia Belen Correa Guerrero², Ajay Kumar Jena³ (1.Toin Univ. Yokohama, 2.Institute of Nanoscience Nanotech. CNEA-CONICET, 3.Univ. Tokyo, School of Arts and Sciences)

Keywords:

perovskite,bishmuth,silber

Perovskite-inspired Silver Bismuth Halides (SBH) with the structure A_aB_bX_x=a+3b (A=Ag; B=Bi; X=I) exhibit a desirable bandgap of 1.8-1.9 eV, strong absorption characteristics, and environmental friendliness attributed to the lower toxicity of bismuth. Previously, we found that phase the pure Ag₂BiI₅ is hard to be achieved due to their multiple phases. Even a desired stoichiometric ratio of AgI to BiI₃ produces an SBH with mixed phases of Ag₂BiI₅, Ag₃BiI₆ with AgI on excess for silver-rich species. Based on our analysis, we will present our study on iodobismuthtates complexes [BiI_3+x]^-x; their presence, concentration varying with the AgI : BiI₃ ratio, and possible correlation to the mixed phase SBH formation. The device performance of SBH-bsed solar cells will also be introfuced.