Wide-spectral-response flexible photo-anode of solar cell and manufacturing method of wide-spectral-response flexible photo-anode
A solar cell and photoanode technology, applied in the field of solar cells, can solve the problems of reducing photocatalytic quantum efficiency, solar energy utilization rate less than 4%, thermal instability, etc.
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[0073] The preparation method of solar cell flexible photoanode of the present invention comprises the steps:
[0074] (i) providing a substrate;
[0075] In another preferred embodiment, the substrate is a substrate whose surface has been pretreated. The pretreatment is, for example, ultrasonic cleaning in an organic solvent (such as acetone or ethanol) for a period of time (such as 1-15 min or 1-10 min).
[0076] (ii) In the electrolytic solution, at least one main surface of the substrate is oxidized, so as to obtain TiO connected to the surface of the substrate. 2 nanostructure layer;
[0077] The electrolytic solution includes an electrolyte and water, wherein the electrolyte includes a fluoride, a supporting electrolyte, and an additive.
[0078] Preferably, the fluoride is selected from the group consisting of ammonium fluoride, potassium fluoride, sodium fluoride, or a combination thereof; the content of the fluoride is 0.1-2wt% of the total electrolyte;
[0079] T...
Embodiment 1
[0104] The preparation of embodiment 1 photoanode 1
[0105] (1) Surface pretreatment of titanium or titanium alloy foils with a thickness of 0.05-1mm:
[0106] Use ultrasonic cleaning in acetone or ethanol organic solvent for 3 minutes to remove the surface pollutants of titanium or titanium alloy foil, take it out and air-dry it for later use.
[0107] (2) Electrolyte solution for anodic oxidation is configured:
[0108] The electrolyte is ammonium fluoride and sodium sulfate, ethylene glycol is added, and the solvent is water. Mix uniformly according to the following mass percentages before use: the content of ammonium fluoride is 0.25wt% of the total electrolyte, the content of sodium sulfate is 1wt% of the total electrolyte, and the content of ethylene glycol is 98.75wt% of the total electrolyte.
[0109] (3) Oxidize the titanium or titanium alloy foil in the configured electrolyte solution:
[0110] In the electrolyte solution prepared in step 2, the titanium or titan...
Embodiment 2-6
[0116] The preparation of embodiment 2-6 photoanode 2-6
[0117] The method is the same as in Example 1, except that the parameters and conditions in Table 1 are used to replace the corresponding parameters and conditions in Example 1.
[0118] Table 1
[0119]
[0120]
[0121] The absorption spectrum of photoanode 2-6 is basically the same as that of photoanode 1. There are absorption peaks in the absorption wavelength range of 200nm-800nm, and the wavelength of the absorption peak is red-shifted to the visible light region, and the absorption rate in the visible light region exceeds 80%.
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