Akademik Veri Yönetim Sistemi
Journal of Alloys and Compounds, cilt.1041, 2025 (SCI-Expanded)
Electrochromic materials are capable of reversibly changing their optical properties under an applied electric field, making them suitable for applications in smart windows and display technologies. Titanium dioxide (TiO2), a promising EC material due to its dual-band modulation and chemical stability, typically suffers from low Li+ ion interaction. In this study, Al3+ ions are investigated as an alternative to Li+ in ultrathin (5–10 nm) undoped and Mo-doped TiO2 films deposited via RF magnetron sputtering. Structural, optical, and electrochemical characterizations are performed using GI-XRD, XPS, spectroscopic ellipsometry, and electrochemical techniques. The Al3+ ion-based electrolyte shows superior electrochromic performance, with an optical modulation of up to 52.35 % and coloration efficiency (CE) of 30.18 cm2 C−1, which are significantly higher than those obtained using Li+ (ΔT: 2.92 %, CE: 3.05 cm2 C−1). While Al3+ ions improve performance, they also contribute to film degradation due to strong Coulombic interactions and the presence of Cl- ions. Mo doping increases the refractive index but does not sufficiently enhance structural stability. This study presents the first demonstration of effective coloration in ultrathin TiO2 films with Al3+ electrolytes, offering valuable insights for the development of high-efficiency, cost-effective electrochromic devices.