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Photochromic mechanism in oxygen-containing yttrium hydride thin films: An optical perspective

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Publication Date
2017-05-08
Authors
Montero, J.
Martinsen, F. A.
García Tecedor, M.
Karazhanov, S Zh.
Hauback, B.
Marstein, E. S.
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American Physical Society
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Oxygen-containing yttrium hydride thin films exhibit photochromic behavior: Transparent thin films reversibly switch from a transparent state to a photodarkened state after being illuminated with UV or blue light. From optical spectrophotometry and ellipsometry measurements of the transparent state and photodarkened state, it is concluded that the photochromic effect can be explained by the gradual growth, under illumination, of metallic domains within the initial wide-band-gap semiconducting lattice. This conclusion is supported by Raman measurements.
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©2017 American Physical Society. This work was financially supported by the Norwegian Research Council though the FRINATEK Project No. 240477/F20 and the IDELAB/NANO2021 Project No. 238848.
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