Table 2 |
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|
Effects of incorporating MWNTs on the electron transport properties of fabricated cells |
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|
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) |
|
|
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|
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 |
|
|
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|
The thickness of the ZnO or ZnO/MWNT film was 8 μm. |
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|
Chang et al. Nanoscale Research Letters 2012 7:166 doi:10.1186/1556-276X-7-166 |
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