Citation

Thien, Gregory Soon How and Cheng, Zhang Xuan and Tan, Ming Yue and Eldjilali, Cheikh Zakaria and Abdelhamed, Abdelrahman Hamed Ebrahem and Sadeq, Faisal Abdullah and Low, Pei Ling and Tan, Kar Ban and Chan, Kah Yoong (2026) Precursor concentration-tuned optical and electrochromic performance of sol-gel-derived V2O5 thin-film devices. Materials Today Communications, 51. p. 114653. ISSN 23524928

Text Precursor concentration-tuned optical and electrochromic performance of sol-gel-derived V2O5 thin-film devices.pdf - Published Version Restricted to Repository staff only Download (9MB)

Abstract

Electrochromic (EC) devices have gained significant attention in energy-saving applications, with V2O5 standing out owing to its excellent Li-ion intercalation and multi-color properties compared to the widely used WO3. Nonetheless, no research has addressed the effect of V2O5 concentration on EC performance. Given the rising popularity of V2O5 in EC devices, this observation has indicated a significant research gap that should be addressed. Therefore, this study investigated the performance of V2O5 EC devices with concentrations ranging between 0.02 mol/L and 0.1 mol/L via sol-gel spin coating. Consequently, higher film thickness was observed as the sol-gel concentration increased, as the V2O5 thin films transformed from amorphous to crystalline phases. Increasing grain size with worm-like structures was also observed as the concentration increased. The EC device that balanced between optical modulation (OM), coloration efficiency (CE), and coloring (tc) with bleaching times (tb) was then observed for the ITO/0.08 V2O5/electrolyte/ITO device. This device showcased optimized values for OM (37.11 %), CE (26.53 cm2 C− 1 ), tc (7 s), and tb (14 s). Overall, these findings could provide novel information regarding the correlation of V2O5 concentration and EC device performance. A unique contribution was also presented in this study by demonstrating a direct relationship between the concentration of sol-gel precursors, the evolution of structure, and the EC performance, potentially for large-scale production and energy-efficient smart window technologies.

Item Type:	Article
Uncontrolled Keywords:	Sol-gel
Subjects:	Q Science > QD Chemistry > QD450-801 Physical and theoretical chemistry
Divisions:	Faculty of Artificial Intelligence & Engineering (FAIE)
Depositing User:	Ms Rosnani Abd Wahab
Date Deposited:	11 Feb 2026 00:56
Last Modified:	11 Feb 2026 00:56
URII:	http://shdl.mmu.edu.my/id/eprint/15331

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