Presentation Information
[9p-P06-24]One-Step Coating and Annealing Process for CsFA Perovskite Layers Using a Spin
Coater with Semi-Automatic micropipette and Radiation heater
〇Koo Takai1, Tomoyuki Tobe2, Tsutomu Miyasaka1, Masashi Ikegami1 (1.Toin Univ. of Yokohama, 2.KISTEC)
Keywords:
Radiation heater,Spin coater,Anti-solvent free
This study aims to develop a new perovskite film formation method that does not rely on the commonly used antisolvent technique, which, although effective for high-quality film fabrication, poses challenges for scaling up to larger areas. Instead of using antisolvents, this research focuses on the role of heating conditions in the film formation process. Specifically, a novel process was explored where the substrate is heated from above using a radiant heater immediately after spin-coating the precursor solution, resembling a solvent vapor annealing (SVA) approach. To eliminate time lag caused by transferring the substrate to a hot plate in the conventional process, a custom-designed device was employed to enable continuous spin-coating and heating without moving the substrate. Using a precursor solution of Cs0.05A0.95Pb(I0.93Br0.07)3 dissolved at 1.2 M in DMSO, and applying radiant heating at 130°C, a power conversion efficiency (PCE) of 9.5% was achieved without using antisolvents. Further experiments varied the heater’s distance and temperature to improve efficiency.These results suggest that this method offers a promising pathway for
efficient, scalable perovskite film formation.
efficient, scalable perovskite film formation.