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, thermal instability, and solar energy utilization rate of less than 4%.
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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 is an absorption peak within the absorption wavelength of 200nm-800nm, and its absorption peak wavelength red shifts to the visible light region, and the absorption rate in the visible light region exceeds 80%.
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