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

△ [20p-PB4-25] Photovoltaic properties of triple cation perovskite solar cells prepared by inkjet printing method

〇(M2)Tomoyuki Tobe¹, Ryoto Funayama³, Hideki Iwahashi³, Akito Endo³, Yoshitaka Sanehira¹, Youhei Numata², Masashi Ikegami¹, Tsutomu Miyasaka¹ (1.Toin Univ. of Yokohama, 2.RCAST, The Univ. of Tokyo, 3.Kishu Giken Kogyo Co.Ltd.)

Keywords:perovskite solar cell, inkjet

Organic-inorganic perovskite solar cells, even when prepared by solution coating processes, are well known as high-efficiency solar cells. We have investigated perovskite solar cells prepared by inkjet printing method. The advantage of inkjet printing method is that it enables easy patterning of the photoactive layers. In this method, small droplets are injected using a nozzle. The size of the droplets and the interval at which they are injected can affect the photovoltaic properties of the fabricated perovskite solar cells. Earlier, we reported the coating of methylammonium lead iodide perovskite (MAPbI3) by inkjet printing method using a 30wt% concentration solution. This is similar to the concentrations used for spin coating method that is widely used for preparing perovskite solar cells.
In this study, we have applied Csx(MA0.17FA0.83)(1?x)Pb(I0.83Br0.17)3 (FA = formamidinium) perovskite, which is well known as a high-efficiency perovskite material, by inkjet coating method. A coating solution was prepared in a similar way as in spin coating method. By optimizing the coating conditions during the fabrication process, we achieved 11% energy conversion efficiency.