Advertisement
Table 2 Effects of incorporating MWNTs on the electron transport properties of fabricated cells
| Electrode composition | Charge-transfer resistance at the ZnO/electrolyte interface [Rk] (ohm) | Electron transport resistance in the ZnO network [Rw] (ohm) | Ratio of Rk to Rw | Mean electron lifetime (ms) | Electron diffusion coefficient in the photoanode (10-4 cm2 s-1×) | Effective electron diffusion length (micrometer) |
|---|---|---|---|---|---|---|
| ZnO | 50.17 | 6.49 | 7.73 | 10.30 | 4.80 | 22.2 |
| ZnO/0.01 wt% O-MWNT | 27.15 | 1.39 | 19.53 | 6.85 | 18.25 | 35.4 |
| ZnO/0.01 wt% acid-MWNT | 41.56 | 3.62 | 11.48 | 8.00 | 9.18 | 27.1 |
