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

[20a-PB2-9] Evaluation of substrate materials and annealing experimental conditions used to process a metal halide perovskite layer with a radiation heater

〇Masaki Osone¹, Masashi Ikegami¹, Tsutomu Miyasaka¹ (1.Toin Univ.of Yokohama)

Keywords:perovskite solar cell, anti-solvent method, spin coating

Lead halide perovskite solar cells have received considerable attention owing to their relatively high energy conversion efficiency exceeding 20% even when a solution-based fabrication process is used. However, many issues with this solution process remain to be improved. One issue is the experimental parameters of the anti-solvent method during the spin coating of a perovskite layer. The anti-solvent method requires the deposition of a solvent, in which perovskite solubility is low, on the substrate during the spinning of a perovskite precursor to form a smooth perovskite layer. The subsequent annealing process is also important. For annealing, typically a hot plate is used. However, the temperature distribution of a hot plate is not uniform and is equipment-specific. Thus, to produce a stable perovskite coating, the development of an annealing heater is also required.In this study, an annealing heater was developed that can be directly attached to a spin coater. Using this heater, the perovskite film can be annealed immediately after spin coating using the anti-solvent method. A 3 cm × 3 cm radiation heater was used to anneal a 2.5 cm × 2.5 cm substrate. For this method, it was determined that materials on which the substrate was placed affect the temperature distribution of the substrate. Thus, the materials and shape of the support on which the glass substrate was placed to achieve uniform annealing was investigated.