Presentation Information
[24a-22C-7]Fabrication of Perovskite Solar Cells Using an Industrially-Applicable Evaporation/Solution-Process Hybrid Method
〇(PC)Abduheber Mirzehmet1, McDonald Calum1, Svrcek Vladimir1, Hitoshi Sai1, Takurou Murakami1, Takuya Matsui1 (1.AIST)
Keywords:
perovskite,Evaporation/Solution-Process
To accelerate the commercialization of perovskite solar cells, the processing of the perovskite light absorber should be scalable and compatible with the established deposition techniques. Various methods are available to form perovskite thin films, such as solution processing (including bar coat, spray, inkjet, etc.), thermal evaporation, and their hybrid processes. The typical hybrid process involves evaporating metal halide (such as PbI2) precursors followed by an organic halide (such as FAI, MAI) solution coating to form perovskite material [1,2]. Recently, this method has gained more attention since it can improve the film coverage on the substrate and is useful for making uniform perovskite film over a large area.
In this study, a hybrid evaporation-solution process is applied to fabricate perovskite thin films (Fig.1). We first evaporated PbI2 films under different evaporation rates. For the solution process, we tentatively used a spin-coating method where an organic halide solution (FAMAIBrCl dissolved in isopropanol) was coated on top of the PbI2 precursor. The resultant typical perovskite film has a band gap of 1.52 eV and provides a power conversion efficiency of 17.45 % in a standard n-i-p configuration single-junction solar cell. We further applied this technique to make perovskite films on the textured silicon substrate for future application to the perovskite/silicon tandem solar cells. The cross-sectional scanning electron microscope (SEM) image demonstrates a conformal coverage of a 550 nm-thick perovskite film over the micron-sized Si pyramidal texture.
[1] Fu, F., et al. Nat Commun. 6, 8932 (2015).
[2] Fu, F., et al. Nat. Energy 2, 16190 (2017).
Acknowledgment: This work was conducted under a project commissioned by NEDO, Japan.
In this study, a hybrid evaporation-solution process is applied to fabricate perovskite thin films (Fig.1). We first evaporated PbI2 films under different evaporation rates. For the solution process, we tentatively used a spin-coating method where an organic halide solution (FAMAIBrCl dissolved in isopropanol) was coated on top of the PbI2 precursor. The resultant typical perovskite film has a band gap of 1.52 eV and provides a power conversion efficiency of 17.45 % in a standard n-i-p configuration single-junction solar cell. We further applied this technique to make perovskite films on the textured silicon substrate for future application to the perovskite/silicon tandem solar cells. The cross-sectional scanning electron microscope (SEM) image demonstrates a conformal coverage of a 550 nm-thick perovskite film over the micron-sized Si pyramidal texture.
[1] Fu, F., et al. Nat Commun. 6, 8932 (2015).
[2] Fu, F., et al. Nat. Energy 2, 16190 (2017).
Acknowledgment: This work was conducted under a project commissioned by NEDO, Japan.