[20p-PB4-1~57] 12.5 Organic solar cells

△ [20p-PB4-17] Exploring Lead-Free Materials by Using Ultrafast Screening and Investigation on Their Optoelectronics

〇(D)Ryosuke Nishikubo¹, Akinori Saeki^1,2 (1.Osaka Univ., 2.JST-PRESTO)

Keywords:perovskite, lead free, solar cells

Containing of toxic lead is one of significant problems of lead-halide-perovskite. Although there are many research trying to substitute Pb with Sn, oxidation of Sn(II) is fateful issue. In our research, we have explored new lead-free materials from Bi and Sb-based materials by using ultrafast screening method: Time-Resolved-Microwave-Conductivity (TRMC) measurement. In this study, some Bi-based and Sb-based materials have exhibited high photo-conductivity, which are comparative or even higher than Sn-based perovskite. We have also investigated other important physical property such as photo-current and energy level. Our study suggests the new lead-free materials as substitution for lead-halide-perovskite.