Presentation Information
[16p-C41-7]Rapid PbI2 Precursor Evaporation toward Industrial Perovskite Solar Cells
〇(P)Abduheber Mirzehmet1, Calum McDonald1, Vladimir Svrcek1, Hitoshi Sai1, Takurou Murakami1, Takuya Matsui1 (1.AIST)
Keywords:
perovskite,evaporation/solution-process,tandem solar cell
Accelerating the adoption of perovskite solar cells is crucial for the evolution of renewable energy technologies. Achieving high-performance perovskite solar cells necessitates scalable processing of the perovskite light absorber, compatible with existing deposition techniques. Fast deposition offers advantages such as reduced production time, increased throughput, and lower manufacturing costs in industrial applications. Methods for forming perovskite thin films include solution processing (bar coating, spray, inkjet, etc.), thermal evaporation, and hybrid processes. A common hybrid process involves evaporating metal halide precursors like PbI2 and then coating them with an organic halide solution (FAMAIBrCl in isopropanol) to form perovskite crystals. This method has recently attracted attention for its ability to enhance film coverage on substrates and produce uniform perovskite films over large areas, potentially enabling the production of fully textured tandem perovskite/Si solar cells.
In this study, we used a hybrid evaporation-solution process to fabricate perovskite thin films. We first evaporated ~300-nm-thick PbI2 films at various rates, with the shortest duration for the highest rate being about 8 minutes. For the solution process, we tentatively applied a spin-coating method to coat the PbI2 film with an organic halide solution (FAMAIBrCl in isopropanol). We found that increasing the evaporation rate resulted in an improvement in overall power conversion efficiency (PCE), comparable to that of spin-coated perovskite. The results indicate that even higher evaporation rates are possible while maintaining the solar cell performance, which is beneficial for industrial applications.
In this study, we used a hybrid evaporation-solution process to fabricate perovskite thin films. We first evaporated ~300-nm-thick PbI2 films at various rates, with the shortest duration for the highest rate being about 8 minutes. For the solution process, we tentatively applied a spin-coating method to coat the PbI2 film with an organic halide solution (FAMAIBrCl in isopropanol). We found that increasing the evaporation rate resulted in an improvement in overall power conversion efficiency (PCE), comparable to that of spin-coated perovskite. The results indicate that even higher evaporation rates are possible while maintaining the solar cell performance, which is beneficial for industrial applications.
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