Thermochromic and photochromic colour change in Mg-Ni-H thin films
Artikel i vetenskaplig tidskrift, 2017

Mg-Ni-H thin films were deposited by reactive magnetron sputtering. As-deposited samples were Mg-rich and annealed in air by two steps at T=220 and 290 °C in order to increase crystallinity. A reversible, thermochromic effect was detected when the crystalline yellow colour sample underwent a colour transition and changed its colour from yellow to red. The change in transmission spectra of the prepared thin films in visible range of spectra was induced by in situ heating setup. The continuous shifts of the transmission spectra at T=200 °C towards lower band gap was observed. Additionally, a photochromic effect was detected and confirmed by exposing the sample to visible light, as grey-coloured area appeared on the sample.

Thermochromics effect

Chromogenic materials

Mg-Ni-H films

Metal hydride films

Författare

Željka Rašković-Lovre

Institutt for energiteknikk

Univerzitet u Beogradu

Trygve Mongstad

Institutt for energiteknikk

Smagul Karazhanov

Institutt for energiteknikk

Simon Lindberg

Chalmers, Fysik, Kondenserade materiens fysik

Chang Chuan You

Institutt for energiteknikk

Stefano Deledda

Institutt for energiteknikk

Materials Letters

0167-577X (ISSN)

Vol. 188 403-405

Ämneskategorier

Fysik

DOI

10.1016/j.matlet.2016.11.089