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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)

Submitter: 高島 舞

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