Structure and optical properties of electrochromic tungsten-containing nickel oxide films
2014 (English)In: Solar Energy Materials and Solar Cells, ISSN 0927-0248, Vol. 126, 248-259 p.Article in journal (Refereed) Published
Electrochromic NixW1-x oxide thin films with 0.5 < x < 1, were deposited by co-sputtering from one Ni and one W metal target. The different compositions were structurally characterized by X-ray diffraction, X-ray photoelectron spectroscopy and Rutherford backscattering spectroscopy. The optical and electrochemical properties were investigated by spectrophotometry and cyclic voltammetry in LiClO4 dissolved in propylene carbonate. It was found that the samples turned amorphous upon W addition and that the NixW1-x oxides probably consisted of hydrated Ni oxides and NiWO4. The charge insertion/extraction and optical modulation was unfortunately very modest. Moreover, an aging effect, resulting in a strong bleaching process of the samples was observed. Nevertheless, it was found that, for electrochromic applications, the advantage of W addition was that the transparency at the bleached state was enhanced for all compositions and for wavelengths of 400 nm up to NIR.
Place, publisher, year, edition, pages
2014. Vol. 126, 248-259 p.
Research subject Engineering Science with specialization in Solid State Physics
IdentifiersURN: urn:nbn:se:uu:diva-179763DOI: 10.1016/j.solmat.2013.04.001ISI: 000338395100036OAI: oai:DiVA.org:uu-179763DiVA: diva2:546164
10th International Meeting on Electrochromism (IME), Holland, MI, August 12-16, 2012