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

Yohei Uemura | Zendy; Ahmed S. M. Ismail | Zendy; Sang Han Park | Zendy; Soonnam Kwon | Zendy; Minseok Kim | Zendy; Hebatalla Elnaggar | Zendy; Federica Frati | Zendy; Hiroki Wadati | Zendy; Yasuyuki Hirata | Zendy; Yujun Zhang | Zendy; Kohei Yamagami | Zendy; Susumu Yamamoto | Zendy; Iwao Matsuda | Zendy; Ufuk Halisdemir | Zendy; Gertjan Koster | Zendy; Christopher J. Milne | Zendy; Markus Ammann | Zendy; Bert M. Weckhuysen | Zendy; Frank M. F. de Groot | Zendy

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

Author(s) -

Yohei Uemura,

Ahmed S. M. Ismail,

Sang Han Park,

Soonnam Kwon,

Minseok Kim,

Hebatalla Elnaggar,

Federica Frati,

Hiroki Wadati,

Yasuyuki Hirata,

Yujun Zhang,

Kohei Yamagami,

Susumu Yamamoto,

Iwao Matsuda,

Ufuk Halisdemir,

Gertjan Koster,

Christopher J. Milne,

Markus Ammann,

Bert M. Weckhuysen,

Frank M. F. de Groot

Publication year - 2022

Publication title -

the journal of physical chemistry letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.563

H-Index - 203

ISSN - 1948-7185

DOI - 10.1021/acs.jpclett.2c00295

Subject(s) - x ray absorption spectroscopy , hematite , femtosecond , absorption spectroscopy , spectroscopy , absorption edge , valence (chemistry) , materials science , analytical chemistry (journal) , band gap , atomic physics , chemistry , optics , laser , physics , optoelectronics , organic chemistry , chromatography , quantum mechanics , metallurgy

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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