Dye-sensitized solar cell photo-anode based on graphene quantum dots, preparation method thereof, and application of dye-sensitized solar cell photo-anode in solar cell
A graphene quantum dot and solar cell technology, applied in the field of quantum dot sensitized solar cells, can solve problems such as inability to meet commercial applications, limitations, low solar cell efficiency, etc. effect of quantity
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Embodiment 1
[0073] TiO 2 Preparation of nanoaggregates:
[0074] Weigh 0.8g of urea and 20mL of deionized water, mix them evenly in a 50ml small beaker, then slowly drop 2mL of titanium isopropoxide into the above mixed solution with a dropper, put the small beaker containing the mixed solution with a fresh-keeping After the film is sealed, put it in an ultrasonic cleaning machine and treat it under ultrasonic for 20 minutes to make it completely dispersed, then transfer the mixed solution to a 50ml tetrachlorofluoro-lined autoclave, and heat it to 180°C in a vacuum drying oven. And keep it warm for 4 hours, turn off the heating power supply, and after the ambient temperature in the vacuum drying oven is naturally cooled to room temperature, open the high-pressure reaction kettle to collect the product and wash it with ethanol. Finally, put the washed white particles into the blast drying oven to fully dry. The desired titanium dioxide nano-aggregate particles can be obtained.
Embodiment 2
[0076] Preparation of graphene quantum dots:
[0077] Weigh 30 mg of anhydrous glucose as a carbon source, dissolve it in 30 ml of deionized water to obtain a 1 mg / ml aqueous glucose solution, and ultrasonically disperse it for 20 minutes to make it evenly dispersed; then transfer the aqueous glucose solution to a 50 ml PTFE-lined hydrothermal In the reaction kettle, use a vacuum drying oven to heat to 200°C and keep it warm for 1h; then cool the reaction kettle to room temperature to obtain a dark brown GQD1h solution with water as the solvent; collect the reactants with a reagent bottle and seal them for storage.
Embodiment 3
[0079] Fabrication of photoanodes for dye-sensitized solar cells based on graphene quantum dots:
[0080] (1) Take by weighing 0.2g of TNA powder of Example 1, mix with 0.88ml of terpineol and 2.0ml of ethyl cellulose (alcohol solvent); place the reagent bottle containing the above mixture on a magnetic stirrer, add magnetic Continue stirring for 2 hours to fully dissolve the powder to obtain TNA slurry;
[0081] (2) Clean the fluorine-doped tin oxide (FTO, 14Ω / cm2) with acetone and ethanol 2 ), used as the substrate of the photoanode, and then the TNA slurry was scraped onto the FTO substrate by the doctor blade method with an area of 0.25 cm 2 ;Put the FTO electrode coated with slurry in a blast drying oven, dry at 60°C for 20 minutes, and after cooling to room temperature, continue to repeat the above process, scrape a new film on the surface of the fully dried slurry film, Put the FTO photoanode coated with a double-layer film in a muffle furnace, and calcinate it at 4...
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