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Reversed double-beam photoacoustic spectroscopy of metal-oxide powders for estimation of their energy-resolved distribution of electron traps and electronic-band structure
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| Title: | Reversed double-beam photoacoustic spectroscopy of metal-oxide powders for estimation of their energy-resolved distribution of electron traps and electronic-band structure |
| Authors: | Nitta, Akio Browse this author | | Takashima, Mai Browse this author | | Murakami, Naoya Browse this author | | Takase, Mai Browse this author | | Ohtani, Bunsho Browse this author →KAKEN DB |
| Keywords: | Reversed double-beam photoacoustic spectroscopy | | Energy-resolved distribution of electron traps | | Valence band-top position | | Metal-oxide powders |
| Issue Date: | 20-Feb-2018 |
| Publisher: | Elsevier |
| Journal Title: | Electrochimica acta |
| Volume: | 264 |
| Start Page: | 83 |
| End Page: | 90 |
| Publisher DOI: | 10.1016/j.electacta.2017.12.160 |
| Abstract: | A novel instrumental methodology, reversed double-beam photoacoustic spectroscopy (RDB-PAS), was developed for measuring the energy-resolved distribution of electron traps (ERDT) of metal-oxide powders. In the RDB-PAS measurement, electrons in the valence band of a powder sample are directly excited to electron traps (ETs) and accumulated in the ETs from the deeper (anodic) side to the shallower (cathodic) side by wavelength-scanned continuous light, and the increase in photoabsorption of electron-filled ETs is measured by modulated light at a fixed wavelength by PAS. It was shown that ERDT/CBB (conduction-band bottom) patterns measured by RDB-PAS can be used for not only identification and detailed characterization of a wide range of metal-oxide powder samples but also estimation of difference in apparent valence-band top (VBT) position. (c) 2018 Elsevier Ltd. All rights reserved. |
| Rights: | © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/76787 |
| Appears in Collections: | 触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 高島 舞
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