Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV19)
Publication date: 6th February 2020
Perovskite solar cells have been attracting increasing attention during half a decade. The control of the crystal structure and analysis of crystallization dynamics of perovskite is very important research topic from the both standpoint of fundamental analysis and device application. We have been focusing on the fabrication control of perovskite in vacuum by laser deposition method [1]. The use of laser for the deposition of CH3NH3I is beneficial for the deposition-rate control. We also conducted crystallization dynamics analysis of perovskite by grazing incident X-ray diffraction (GIXD) at SPring-8 [2]. In this presentation, we would like to report our recent research results of crystallization dynamics analysis during laser deposition process of CH3NH3PbI3 perovskite.
We designed special vacuum chamber where laser deposition and GIXD measurement can be conducted simultaneously. The chamber was installed at BL46XU in SPring-8 and crystallization dynamics of the deposition process of perovskite was analyzed. Firstly, the real-time analysis of alternative deposition process was conducted. c-axis oriented PbI2 crystal was observed with clear Laue oscillation, which represents the construction of smooth surface. CH3NH3I was supplied on the film and CH3NH3PbI3 perovskite was constructed, where its [1 1 0] axis was oriented perpendicular to the substrate. Next, real-time analysis of co-deposition process was conducted. The difference of the crystallization dynamics depending on the substrate temperature was investigated.
This work is financially supported by NEDO, JST, and JSPS.
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