[18p-P09-1~54] 12.5 Organic and hybrid solar cells

[18p-P09-26] Influence of Heating Time on Anti-solvent-Free Conditions of CsFA Perovskite Layer Using Inkjet Printer

〇Shoukatsu Yamaguchi¹, Tomoyuki Tobe^1,4, Ryoto Funayama³, Masashi Ikegami¹, Tsutomu Miyasaka² (1.Graduate School of Engineering, Toin University of Yokohama, 2.Faculty of Biomedical Engineering, Toin University of Yokohama, 3.Kishu Giken Kogyo, Co. Ltd., 4.KISTEC)

Keywords:

perovskite,Inkjet method,anti-solvent free

Measurement of energy conversion efficiencies and durability test of perovskite solar cells is ideally conducted using sealed solar cells. When sealing is carried out, patterning of transparent conductive substrates and pattern printing are performed. Inkjet method which we have been developing involves coating a perovskite layer without using anti solvents while heating the substrate to over 100°C. Essentially, precursor solution is ejected from the inkjet head, solvent evaporates upon hitting the substrate, and the perovskite layer forms. Therefore, due to variations in total heating time between the start and end of printing, the position of the substrate may affect conversion efficiency. We investigated the effects of patterning methods and printing patterns (positions, cell sizes) on these factors. In our experiments of 2.5 cm square seal cells, we conducted validation of etching positions and printing patterns (including start and end positions) for active area sizes ranging from 3 mm to 10 mm square.