Effect of post-annealing on structural and electrochromic properties of Mo-doped V2O5 thin films

The effect of post-annealing on the structural and electrochromic properties of the Mo-doped V2O5 thin films was investigated in this paper. With varying the annealing temperature, the interlayer distance is increased from 1.16 (as-deposited) to 1.38 nm (annealing at 250 degrees C), and the enlarged interlayer spacing would facilitate ion movement in between the interlayers inside the electrochromic matrix. Therefore, both the optical modulation and color efficiency of the Mo-doped V2O5 thin films are enhanced after appropriate post-annealing treatment. Our results demonstrate that Mo-doped V2O5 material is one of the promising candidates to be used in multi-color electrochromic devices.Graphical Abstract The ability to modulate optical transmittance of the Mo-doped V2O5 thin films is greatly enhanced by means of the larger interlayer distance after annealing.[GRAPHICS]