Publications by authors named "Fahimeh Nafezarefi"
Influence of Crystal Structure, Encapsulation, and Annealing on Photochromism in Nd Oxyhydride Thin Films.
J Phys Chem C Nanomater Interfaces
February 2022
Article Synopsis
- - Thin films of rare earth metal oxyhydrides exhibit photochromic effects, but the exact mechanism is not yet understood.
- - By adjusting the composition (O:H) during sputtering, we can alter the films' band gap, crystal structure, and photochromic contrast.
- - To extend the lifespan of these films from 1 day to several months, we applied a thin ALD coating of AlO, which also affects the bleaching speed and kinetics of the photochromic effect.
Thin films of rare-earth (RE)-oxygen-hydrogen compounds prepared by reactive magnetron sputtering show a unique color-neutral photochromic effect at ambient conditions. While their optical properties have been studied extensively, the understanding of the relationship between photochromism, chemical composition, and structure is limited. Here we establish a ternary RE-O-H composition-phase diagram based on chemical composition analysis by a combination of Rutherford backscattering and elastic recoil detection.
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