Details

Autor(en) / Beteiligte

• 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.

Titel

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

Ist Teil von

• The journal of physical chemistry letters, 2022-05, Vol.13 (19), p.4207-4214

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Hematite (α-Fe2O3) 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.