Akademik Veri Yönetim Sistemi
Journal of Power Sources, cilt.657, 2025 (SCI-Expanded)
Vanadium pentoxide (V2O5) attracts significant attention in electrochromism due to its multicolor aspects and high ion storage capacity. This study comprehensively investigates the electrochromic properties of nanostructured V2O5 thin films deposited via RF magnetron sputtering. The research aims to optimize growth parameters and post-annealing conditions to achieve superior electrochemical stability, fast response times, and enhanced optical modulation. In this context, the film growth at 100 °C has exhibited a nanowall morphology, as well as improved electrochromic performance. The 200 °C post-annealing process has enhanced the structural quality and electrochromic performance of the obtained film. This film exhibits the highest stability, with transmittance retention of 97.9 % at 450 nm and 92.6 % at 700 nm after 900 cycles, outperforming other samples. The coloration and bleaching times at 450 nm have been recorded as 1.6 s and 1.5 s, respectively, demonstrating rapid switching behavior. Furthermore, this sample has maintained high optical modulation, showing a maximum transmittance change of 52.4 % at 450 nm and 29.1 % at 700 nm. As the cathodic voltage changes from +1.0 V to −0.5 V, the color of the thin film shifts from transparent yellow to yellow-green, then green, and eventually deep blue, demonstrating multicolor switching. Furthermore, after 1500 cycles, the film retains 77.8 % of its initial specific capacitance.