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Hole Dynamics in Photoexcited Hematite Studied with Femtosecond Oxygen K-edge X-ray Absorption Spectroscopy

Authors :
Uemura, Yohei
Ismail, Ahmed S M
Park, Sang Han
Kwon, Soonnam
Kim, Minseok
Elnaggar, Hebatalla
Frati, Federica
Wadati, Hiroki
Hirata, Yasuyuki
Zhang, Yujun
Yamagami, Kohei
Yamamoto, Susumu
Matsuda, Iwao
Halisdemir, Ufuk
Koster, Gertjan
Milne, Christopher
Ammann, Markus
Weckhuysen, Bert M
de Groot, Frank M F
Sub Inorganic Chemistry and Catalysis
Sub Materials Chemistry and Catalysis
Faculteit Betawetenschappen
Inorganic Chemistry and Catalysis
Materials Chemistry and Catalysis
Inorganic Materials Science
MESA+ Institute
Sub Inorganic Chemistry and Catalysis
Sub Materials Chemistry and Catalysis
Faculteit Betawetenschappen
Inorganic Chemistry and Catalysis
Materials Chemistry and Catalysis
Source :
Journal of physical chemistry letters, 13(19), 4207-4214. American Chemical Society, The journal of physical chemistry letters, 13(19), 4207. American Chemical Society : Division of Carbohydrate Chemistry
Publication Year :
2022
Publisher :
American Chemical Society (ACS), 2022.

Abstract

Hematite (α-Fe 2O 3) is a photoelectrode for the water splitting process because of its relatively narrow bandgap and abundance in the earth's crust. In this study, the photoexcited state of a hematite thin film was investigated with femtosecond oxygen K-edge X-ray absorption spectroscopy (XAS) at the PAL-XFEL in order to follow the dynamics of its photoexcited states. The 200 fs decay time of the hole state in the valence band was observed via its corresponding XAS feature.

Subjects

Subjects :
General Materials Science
Physical and Theoretical Chemistry

Details

ISSN :
19487185
Volume :
13
Database :
OpenAIRE
Journal :
The Journal of Physical Chemistry Letters
Accession number :
edsair.doi.dedup.....ab051ef074a6282004dcb82160ec3ac1

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