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Improved water splitting efficiency of Au-NP-loaded Ga2O3 thin films in the visible region under strong coupling conditions
| Title: | Improved water splitting efficiency of Au-NP-loaded Ga2O3 thin films in the visible region under strong coupling conditions |
| Authors: | Wang, Yaguang Browse this author | | Shi, Xu Browse this author | | Oshikiri, Tomoya Browse this author →KAKEN DB | | Misawa, Hiroaki Browse this author →KAKEN DB |
| Issue Date: | 7-Jan-2023 |
| Publisher: | Royal Society of Chemistry |
| Journal Title: | Nanoscale advances |
| Volume: | 5 |
| Issue: | 1 |
| Start Page: | 119 |
| End Page: | 123 |
| Publisher DOI: | 10.1039/d2na00768a |
| Abstract: | We fabricate a novel photoanode consisting of TiO2/Au nanoparticles (Au-NPs)/Ga2O3/TiN/Au-film (TAGA), efficiently increasing light absorption and electron transfer from Au-NPs to Ga2O3 under modal strong coupling. A TiN thin layer deposited on an Au film enables stable high-temperature deposition of Ga2O3 onto the reflective Au film mirror. Modal strong coupling is observed when the resonance wavelength of the Ga2O3/TiN/Au-film Fabry-Perot cavity overlaps with the plasmon resonance wavelength of Au-NPs partially inlaid in a thin TiO2 layer. Under strong coupling conditions, the light absorption and photoelectrochemical conversion efficiency in the visible region increased more than in the samples without coupling. In this structure, the TiO2 layer partially inlaying Au-NPs plays a vital role in effectively enhancing the coupling strength. We accomplish water splitting at zero bias potential by taking advantage of the intrinsically negative conduction band potential of Ga2O3. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/87834 |
| Appears in Collections: | 電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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