Print Email Facebook Twitter Aliovalent Calcium Doping of Yttrium Oxyhydride Thin Films and Implications for Photochromism Title Aliovalent Calcium Doping of Yttrium Oxyhydride Thin Films and Implications for Photochromism Author Chaykina, D. (TU Delft ChemE/Materials for Energy Conversion and Storage) Usman, I.N. (TU Delft QN/Kavli Nanolab Delft) Colombi, G. (TU Delft ChemE/Materials for Energy Conversion and Storage) Schreuders, H. (TU Delft ChemE/O&O groep) Tyburska-Pueschel, Beata (Dutch Institute for Fundamental Energy Research) Wu, Z. (TU Delft RST/Fundamental Aspects of Materials and Energy) Eijt, S.W.H. (TU Delft RST/Fundamental Aspects of Materials and Energy) Bannenberg, L.J. (TU Delft RID/TS/Instrumenten groep; TU Delft RST/Storage of Electrochemical Energy) De Wijs, Gilles A. (Radboud Universiteit Nijmegen) Dam, B. (TU Delft ChemE/Chemical Engineering) Department ChemE/Chemical Engineering Date 2022 Abstract To develop an understanding of the photochromic effect in rare-earth metal oxyhydride thin films (REH3-2xOx, here RE = Y), we explore the aliovalent doping of the RE cation. We prepared Ca-doped yttrium oxyhydride thin films ((CazY1-z)HxOy) by reactive magnetron cosputtering with Ca doping concentrations between 0 and 36 at. %. All of the films are semiconductors with a constant optical band gap for Ca content below 15%, while the band gap expands for compositions above 15%. Ca doping affects the photochromic properties, resulting in (1) a lower photochromic contrast, likely due to a lower H- concentration, and (2) a faster bleaching speed, caused by a higher pre-exponential factor. Overall, these results point to the importance of the H- concentration for the formation of a "darkened"phase and the local rearrangement of these H- for the kinetics of the process. To reference this document use: http://resolver.tudelft.nl/uuid:9bbac4ee-f529-4fd9-8c22-072a849e4b28 DOI https://doi.org/10.1021/acs.jpcc.2c04456 ISSN 1932-7447 Source The Journal of Physical Chemistry C, 126 (34), 14742-14749 Part of collection Institutional Repository Document type journal article Rights © 2022 D. Chaykina, I.N. Usman, G. Colombi, H. Schreuders, Beata Tyburska-Pueschel, Z. Wu, S.W.H. Eijt, L.J. Bannenberg, Gilles A. De Wijs, B. Dam Files PDF acs.jpcc.2c04456.pdf 4.5 MB Close viewer /islandora/object/uuid:9bbac4ee-f529-4fd9-8c22-072a849e4b28/datastream/OBJ/view