2024-03-28T20:40:07Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/473002022-11-17T02:08:08Zhdl_2115_20045hdl_2115_139Ultraviolet-induced erasable photochromism in bilayer metal oxide filmsTerakado, NobuakiTanaka, KeijiNakazawa, AkiraOxide filmWide-gap semiconductorPhotochromism425We demonstrate that the optical transmittance of bilayer samples consisting of pyrolytically coated amorphous Mg-Sn-O and metal oxide films such as In2O3 and SnO2 decreases upon ultraviolet illumination, which can be recovered by annealing in air at ∼300℃. Spectral, structural, and compositional studies suggest that this photochromic phenomenon is induced by photoelectronic excitation in the Mg-Sn-O film, electron injection into the metal oxide, which becomes negatively charged, and subsequent formation of metallic particles, which absorb and/or scatter visible light.ElsevierJournal Articleapplication/pdfhttp://hdl.handle.net/2115/47300https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/47300/1/SSC151-18_1285-1287.pdf0038-1098Solid State Communications15118128512872011-09enginfo:doi/10.1016/j.ssc.2011.05.037author