https://doi.org/10.1051/epjconf/202226101001
Oxygen mobility in yttrium hydride films studied by isotopic labelling
1
Department of Physics and Astronomy, Uppsala University, Box 516, 751 20 Uppsala, Sweden
2
Department of Material Science, Moscow Engineering Physics Institute, 115409, Moscow, Russia
* Corresponding author: dmitry.moldarev@physics.uu.se
Published online: 11 April 2022
The photochromic properties of oxygen-containing yttrium hydride thin films are directly dependent on the oxygen concentration in the material. We use 16O/18O labelling to study oxidation of YH2 films. Oxygen penetrates the film through grain boundaries and intercolumnar voids oxidising the whole film thickness, without pronounced surface oxidation or self-passivation. Once oxidised, the mobility of oxygen in the films is low and no detectable changes in chemical composition of 18O-labeled YHO films is found under illumination.
© The Authors, published by EDP Sciences, 2022
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