[20a-PB2-1~59] 12.5 Organic solar cells

[20a-PB2-7] Deposition of organic-inorganic hybrid perovskites using a piezo-acoustic inkjet technique without nozzles

〇Ayaho Tsukamoto¹, Mutsuo Ishikawa², Akito Endo³, Shintaro Yasui⁴, Masashi Ikegami¹, Tsutomu Miyasaka¹ (1.Graduate School of Eng. Toin Univ. of Yokohama, 2.Toin Univ. of Yokohama, 3.Kishu Giken CO. ltd., 4.TITECH)

Keywords:perovskite solar cell, inkjet, ultrasonic transducer

Solar cells made with organic-inorganic hybrid perovskite crystals are attracting attention because they can achieve high energy conversion efficiency (PCE) of 20%. However, to take advantage of this unique coating, an inkjet method is used to draw pattern on curved surfaces. In addition, there are few reported cases of this technique. In general, a highly polar solvent, N,N-dimethylformamide (DMF), is used to form the perovskite layer. However, owing to safety concerns, perovskite layer formation with aqueous- or alcohol-based solvents is preferred. It is desired that water-soluble lead nitrate (Pb(NO₃)₂) or lead acetate (Pb(CH₃CO₂)₂) as lead sources and methyl ammonium iodide (MAI) dissolved in 2-propanol are simultaneously coated under atmospheric conditions to obtain the substrate. Therefore, in this study, a nozzleless acoustic inkjet device was manufactured. This device ejects droplets from the liquid surface by acoustic energy. Pb(NO₃)₂ was dissolved in water to prepare organic-inorganic hybrid perovskite solar cells.