Presentation Information
[9p-P06-23]Influence of Inkjet Droplet Size Variation of CsFA Perovskite Layers on Solar Cell Efficiency and Module Printing Parameters
〇(M1)Kotone Uchiyama1, Tomoyuki Tobe2, Ryoto Funayama3, Tsutomu Miyasaka1, Masashi Ikegami1 (1.Toin Univ. of Yokohama, 2.KISTEC, 3.Kishu Giken Kogyo)
Keywords:
Inkjet,Droplet Size,Module
Inkjet printing is gaining attention for perovskite solar cell fabrication, as perovskite layers must be patterned in practical application modules, and inkjet printing allows for direct patterning of the light-absorbing layer. The process involves ejecting a precursor solution from the print head. This solution must be periodically refilled into a reservoir tank, which typically requires cleaning with a solvent beforehand. However, the cleaning, refilling, and preparation of the precursor solution can sometimes lead to variations in concentration. Additionally, the reservoir must be degassed before printing, and this step can affect droplet size, thereby impacting print quality. To address these issues, we studied how adjusting droplet spacing to maintain a consistent perovskite volume per unit area influences power conversion efficiency. Using an inkjet printer equipped with a single-nozzle head, we controlled both substrate and head temperatures and printed a Cs/FA mixed halide perovskite solution. Droplet shape and the resulting spread and drying patterns of the perovskite film were analyzed to optimize printing conditions.