研究実績の概要 |
In this year, the most important research targets were 1) Construction of vacuum chamber and 2) Confirmation of organohalide perovksite thin film fabrication. We completed the plan smoothly. The first manuscript using the constructed chamber is published at The Journal of Physical Chemistry Letters (IF=9.353)
The detailed progress: 1. We have performed the constructuion of vacuum chamber for the fabricaiton of organohalide perovksite thin film. And in the pre-testing experiment, we confirmed the sequntial vacuum evaporation method was useful. 2. To understand the instability of Sn-based perovskite, CH3NH3SnI3, photoelectron spectroscopy with synchrotron radiation and theoretical calculations, such as density functional theory and ab-initio molecular dynamics, were performed. Findings from this experimental and theoretical study highlight the crucial changes of surface-chemical states, the broken chemical bondings in Sn-I, and the depletion of a CH3-NH3+ cation on the surface region. The material instability origin of Sn-based perovskite can be explained by the chemical state instability in the surface. 3. Now, the manuscript is published at The Journal of Physical Chemistry Letters (IF=9.353). (https://pubs.acs.org/doi/10.1021/acs.jpclett.8b00494) (The reviewer mentioned our manuscript would be in TOP 10% reading in Journal of Physical Chemistry Letters)
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