V2O5:ZnO thin films deposited by thermionic vacuum arc for electrochromic applications
Physica B: Condensed Matter, cilt.741, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 741
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.physb.2026.419179
- Dergi Adı: Physica B: Condensed Matter
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC
- Anahtar Kelimeler: Electrochromic device, V2O5, V2O5:ZnO thin films
- Eskişehir Osmangazi Üniversitesi Adresli: Evet
Özet
In this study, V2O5:ZnO thin films were deposited on uncoated glass and indium tin oxide (ITO)-coated glass substrates via the thermionic vacuum arc (TVA) method, and morphology, optical, and electrochromic properties were investigated. FESEM and AFM analyses revealed a more uniform and compact morphology on the ITO-coated substrate, while XPS analysis confirmed the presence of Zn, O, and a detectable amount of V on the film surface. UV-Vis measurements indicated high optical transparency (70-80%) in the visible spectrum for both samples. The calculated band gap values were 2.75 eV and 2.89 eV for glass and ITO substrates, respectively. Repeated chronoamperometry (RCA) analysis demonstrated that the V2O5:ZnO thin film on ITO-coated glass maintains nearly unchanged peak currents over 6000 s (30 cycles). From the chronoamperometry (CA) results, coloring time is 20 s and bleaching time is 15 s. The apparent Li+ diffusion coefficients were estimated as 1.14 x 10−9 cm2 s−1 for the anodic process and 4.04 x 10−9 cm2 s−1 for the cathodic process. A coloration efficiency (CE) value of -39.2 cm2/C was obtained, accompanied by a 39.6% reversibility. The CE and reversibility values indicate dual-mode electrochromic behavior of the thin film influenced by ZnO incorporation and partial ion trapping effects.