Electrochromic Performance of Nickel Oxide Thin Film: Synthesis via Electrodeposition Technique

Abstract

Summary: Nanocrystalline Nickel oxide (NiO) thin films were electrochemically deposited onto ITO substrate at room temperature. In order to examine the optical absorption, crystal structure and surface morphology of deposited NiO thin films were characterized by means of UV-vis spectrophotometer, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The electrochromic (EC) performance of NiO thin film was investigated by means of cyclic voltammetry (CV), chronoamperometry (CA) and chronocoulometry (CC). The switching response of NiO thin film is found to be 5.62 s for coloration (t c ) and 4.31 sec for bleaching (t b ) with excellent reversibility. The electrochromic study shows highly reversible and the stable nature of electrochemically deposited NiO thin films which provides a versatile and promising application towards the fabrication of smart windows.

Improving Electrochromic Cycle Life of Prussian Blue by Acid Addition to the Electrolyte

“…The reversibility of the film is expressed as the ratio of the extracted charges (Q ex ) to inserted charges (Q in ) during the bleaching and coloration processes as follows [32]:Reversibility=QexQin×100%…”

Low Temperature Annealing Improves the Electrochromic and Degradation Behavior of Tungsten Oxide (WOx) Thin Films

“…The switching response for coloration and bleaching of all thin films samples can be determined by the chronoamperometry scan (CA), at pulse potential ±1.5 V for 20 s. The response time for coloration and bleaching is defined as the time needed for excess current to reduce to 10% of its absolute maximum value. , The as-purchased WO 3 thin film showed a response time of 5 s/1 s for coloration/bleaching, compared with the 350 °C annealed sample of 8.4 s for the coloration and 1.5 s for bleaching. The as-prepared W 18 O 49 obtained coloration and bleaching times of 11 and 3.3 s, respectively, against the 13.3 and 4.4 s for 300 °C annealed sample.…”

Optimization of the deposition conditions for Ni(OH)2 films for electrochromic elements of “smart” windows

“…This is due to their relative simplicity, ease of control over final products, ease of automation, lack of high-tech equipment and relatively low power consumption [16]. However, despite existing works related to electrochemical deposition from solutions [17,18], not all aspects of Ni(OH) 2 film deposition are studied to this day. Thus, deposition of Ni(OH) 2 from nickel nitrate solutions with different concentration onto low-conductivity substrates, which are oxide films used as electrodes, has not been studied in full detail.…”