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

[Image: see text] Hematite (α-Fe(2)O(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 spe...

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Autores principales: 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.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9125685/
https://www.ncbi.nlm.nih.gov/pubmed/35512383
http://dx.doi.org/10.1021/acs.jpclett.2c00295
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author 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.
author_facet 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.
author_sort Uemura, Yohei
collection PubMed
description [Image: see text] Hematite (α-Fe(2)O(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.
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spelling pubmed-91256852022-05-24 Hole Dynamics in Photoexcited Hematite Studied with Femtosecond Oxygen K-edge X-ray Absorption Spectroscopy 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. J Phys Chem Lett [Image: see text] Hematite (α-Fe(2)O(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. American Chemical Society 2022-05-05 2022-05-19 /pmc/articles/PMC9125685/ /pubmed/35512383 http://dx.doi.org/10.1021/acs.jpclett.2c00295 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle 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.
Hole Dynamics in Photoexcited Hematite Studied with Femtosecond Oxygen K-edge X-ray Absorption Spectroscopy
title Hole Dynamics in Photoexcited Hematite Studied with Femtosecond Oxygen K-edge X-ray Absorption Spectroscopy
title_full Hole Dynamics in Photoexcited Hematite Studied with Femtosecond Oxygen K-edge X-ray Absorption Spectroscopy
title_fullStr Hole Dynamics in Photoexcited Hematite Studied with Femtosecond Oxygen K-edge X-ray Absorption Spectroscopy
title_full_unstemmed Hole Dynamics in Photoexcited Hematite Studied with Femtosecond Oxygen K-edge X-ray Absorption Spectroscopy
title_short Hole Dynamics in Photoexcited Hematite Studied with Femtosecond Oxygen K-edge X-ray Absorption Spectroscopy
title_sort hole dynamics in photoexcited hematite studied with femtosecond oxygen k-edge x-ray absorption spectroscopy
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9125685/
https://www.ncbi.nlm.nih.gov/pubmed/35512383
http://dx.doi.org/10.1021/acs.jpclett.2c00295
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