| 研究実績の概要 |
In 2021, we developed a simple method to synthesize a series of Cu2-xSeyS1-y alloyed NCs with different crystal phases, including rhombohedral, cubic, orthorhombic, and tetragonal phases. The chemical composition and crystal phases Cu2-xSeyS1-y NCs were finely tuned by varying Se/S ratio during the hot injection process. Consequently, the LSPR absorption in the near-infrared region and the energy band structure were systematically modulated by chaging the crystal phases. We illustrate the mechanism of band engineering modulating the LSPR of such plosmonic semiconductors. This work was currently accepted on the Journal of of Physical Chemistry C.
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| 今後の研究の推進方策 |
In the next year, we plan to utilize the novel Cu2-xSeyS1-y alloyed NCs with tunable band structure and LSPR characteristics to convert solar energy to chemical fuel such as oxygen by NIR light which accounts for 52% of the sunlight. Moreover, we will explore the mechanism how the tunable band structure influence on the plasmon-induced hot carriers in the photoelectrochemical system which plays a key role in improving the performance of plasmonic semiconductors for photoelectrocatalytic oxygen evolution. Finally, we hope we can propose an effective way to improve the solar energy conversion efficiency of plasmonic semiconductros (copper chalcogenides) through tailoring the band structure and LSPR property.
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