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DOE OSTI · 1996976

Synchrotron based transient x-ray absorption spectroscopy for emerging solid-state energy materials

Nyakuchena, James·Zhang, Xiaoyi·Huang, Jier
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Abstract

The rational design of cutting-edge materials for an efficient solar energy conversion process is a challenging task, which demands a fundamental understanding of the mechanisms operative during the photoinduced physical and chemical reactions. In response to these issues, progress in the field has steered attention toward the use of time-resolved spectroscopic techniques to resolve the multiple intermediate species involved in these photoinduced reactions. Thanks to the advent of pump–probe technique, which leads to the development of various time-resolved spectroscopic methods, significant progress has been made in understanding the photophysical and photochemical properties (e.g., excited state dynamics, charge transfer mechanism, charge separation dynamics, etc.) of energy materials. Synchrotron-based x-ray transient absorption (XTA) spectroscopy is one of the most important time-resolved techniques to unravel the direct correlation of the material structure with their photophysical properties owing to its unique capability in directly observing electronic and structural evolution simultaneously. As a result, the aim of this work is to provide a systematic overview of the recent progress in using XTA for capturing the structural dynamics associated with excited state and charge separation dynamics in emerging solid-state energy materials.

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14 SOLAR ENERGY37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRYCharge transferExtended X-ray absorption fine structureNear edge X-ray absorption fine structure spectroscopyPhotoinduced reactionsPump probe experimentsSolar energy conversionSynchrotronsX-ray absorption spectroscopy

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Nyakuchena, James, Zhang, Xiaoyi, Huang, Jier. 2023-04-06. Synchrotron based transient x-ray absorption spectroscopy for emerging solid-state energy materials. https://doi.org/10.1063/5.0133227

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