Research Article
Enhanced Colouration Efficiency of Pulsed DC Magnetron Sputtered WO3 Films Cycled in H2SO4 Electrolyte Solution
Table 1
Various electrochemical parameters of WO3 films cycled in 0.1 M H2SO4 electrolyte.
| Film preparation conditions (DC power and pulsing frequency) | Scan rate (mV/s) | (mA) | () (cm2/s) | (mA) | () (cm2/s) |
| 50 W; 25 kHz | 50 | 0.93 | 2.37 10−10 | 0.37 | 3.87 10−11 | 100 | 1.81 | 4.47 10−10 | 0.75 | 7.60 10−11 | 150 | 2.54 | 5.82 10−10 | 1.08 | 1.06 10−10 |
| 50 W; 50 kHz | 50 | 1.52 | 6.28 10−10 | 0.52 | 7.34 10−11 | 100 | 3.45 | 1.61 10−9 | 1.38 | 2.59 10−10 | 150 | 5.17 | 2.41 10−9 | 2.11 | 4.04 10−10 |
| 50 W; 100 kHz | 50 | 1.42 | 5.48 10−9 | 0.61 | 1.02 10−10 | 100 | 3.46 | 1.62 10−9 | 1.37 | 2.54 10−10 | 150 | 3.87 | 1.35 10−9 | 1.55 | 2.18 10−10 |
| 100 W; 25 kHz | 50 | 0.77 | 1.62 10−10 | 0.08 | 1.93 10−12 | 100 | 2.04 | 5.64 10−10 | 0.73 | 7.39 10−11 | 150 | 6.08 | 3.33 10−9 | 2.05 | 3.80 10−10 |
| 100 W; 50 kHz | 50 | 0.94 | 2.39 10−10 | 0.03 | 3.73 10−13 | 100 | 1.27 | 2.19 10−10 | 0.33 | 1.55 10−11 | 150 | 1.99 | 3.60 10−10 | 0.89 | 7.26 10−11 |
| 100 W; 100 kHz | 50 | 2.27 | 1.40 10−9 | 0.84 | 1.91 10−10 | 100 | 4.06 | 2.23 10−9 | 1.66 | 3.73 10−10 | 150 | 5.03 | 2.28 10−9 | 2.29 | 4.75 10−10 |
| 150 W; 25 kHz | 50 | 1.82 | 8.99 10−10 | 0.85 | 1.95 10−10 | 100 | 4.22 | 2.41 10−9 | 1.85 | 4.64 10−10 | 150 | 5.15 | 2.39 10−9 | 2.59 | 6.07 10−10 |
| 150 W; 50 kHz | 50 | 0.83 | 1.87 10−10 | 0.37 | 3.72 10−11 | 100 | 1.32 | 2.37 10−10 | 0.71 | 6.81 10−11 | 150 | 1.73 | 2.70 10−10 | 0.98 | 8.70 10−11 |
| 150 W; 100 kHz | 50 | 1.08 | 3.15 10−10 | 0.45 | 5.60 10−11 | 100 | 1.91 | 4.96 10−10 | 0.95 | 1.23 10−10 | 150 | 2.99 | 8.09 10−10 | 1.28 | 1.49 10−10 |
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