Thin films of yttrium oxy-hydride have interesting, reversible photochromic properties, the origin of which is poorly understood. To investigate the role of point defect mobility, we probed the effect of lattice contraction as induced by the addition of zirconium. Interestingly, we find no loss of photochromic contrast for Y 1-z Zr z O x H y films with a small Zr cationic fractions (z < 0.15). At larger fractions the photochromic contrast is reduced. Zirconium is found to slow down the bleaching process, which suggests that the mobility of point defects may play a role in the thermal bleaching process. However, we cannot rule out substitution of zirconium in the YO x H y lattice which may also affect the photochromic properties.

Original languageEnglish
Article number109923
JournalSolar Energy Materials and Solar Cells
Publication statusPublished - 2019

    Research areas

  • Photochromic materials, Reactive sputtering, Thin films, Yttrium oxy-hydride

ID: 53906865