Abstract
Molybdenum oxide thin films were deposited by reactive DC magnetron sputtering and were subjected to voltammetric cycling in an electrolyte comprised of lithium perchlorate in propylene carbonate. The films were heavily degraded during 20 voltammetric cycles in an extended voltage range. The films were subsequently rejuvenated by use of potentiostatic treatments under different voltages during 20 hours. Optical changes were recorded during the electrochemical degradation and ensuing rejuvenation.
Highlights
Electrochromic (EC) materials are capable of going through reversible and persistent optical changes when subjected to a potential difference exerting insertion/extraction of ions and electrons [1]
The first cycles exhibit anomalous data, which is a common feature for many EC oxides, but the following Cyclic voltammetry (CV) cycles tended to remain stable, as shown in panel (a)
The bleached state improves somewhat towards the end of the 20 CV cycles and the colored state becomes more pronounced at the end of the cycling than for the first cycle
Summary
Electrochromic (EC) materials are capable of going through reversible and persistent optical changes when subjected to a potential difference exerting insertion/extraction of ions and electrons [1]. In this present work we prepared MoO3 thin films by reactive DC sputtering and studied their EC performance using voltammetric cycling in an extended voltage range to ensure degradation within 20 insertion/extraction cycles for ions and electrons.
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