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15 March 2023 Revealing CuO thin film charge dynamics by from ps to μs transient absorption spectroscopy and numerical modeling
Mona Asadinamin, Susanne Ullrich, Henning Meyer, Yiping Zhao
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Proceedings Volume PC12419, Ultrafast Phenomena and Nanophotonics XXVII; (2023) https://doi.org/10.1117/12.2651166
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
Understanding the mechanism of charge dynamics of photocatalytic materials is the key to design and optimize more efficient materials for many renewable energy applications such as solar water splitting, solar CO2 conversion, etc. In this study, the charge dynamics of CuO thin films is unraveled by the combination of ultrafast (picosecond) and nanosecond TAS techniques. To unravel the complicated charge dynamics of CuO, 3 different excitation wavelength are used which clarify the role of the defect states within the band gap. A compelling energy diagram with a rate-equation-based numerical model has proposed to successfully disentangle different transitions which captures both the spectral and time-dependent behaviors. This understanding can help us to better design CuO based photocatalysts.
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Mona Asadinamin, Susanne Ullrich, Henning Meyer, and Yiping Zhao "Revealing CuO thin film charge dynamics by from ps to μs transient absorption spectroscopy and numerical modeling", Proc. SPIE PC12419, Ultrafast Phenomena and Nanophotonics XXVII, (15 March 2023); https://doi.org/10.1117/12.2651166
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KEYWORDS
Picosecond phenomena
Thin films
Absorption spectroscopy
Numerical modeling
Solar energy
Renewable energy
Semiconductors
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