Nanometer titanium dioxide composite thin film material with gold nano particles inlaid and preparation method thereof
A nano-titanium dioxide, gold nanoparticle technology, applied in the direction of photosensitive equipment, final product manufacturing, sustainable manufacturing/processing, etc., to achieve the effect of enhancing dye absorption, increasing open-circuit photovoltage, and increasing short-circuit photocurrent
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Embodiment 1
[0022] Embodiment 1: Preparation of gold nanoparticle colloid
[0023] Add 50mL of acetone to 8.4g of 4-chloromethylstyrene and 14.9g of triphenylphosphine, stir at 45°C for about 50h under nitrogen protection, filter and wash with acetone, and dry under vacuum for 12h to obtain white solid Quaternary phosphonium salt ionic liquid monomer, and then dissolve the ionic liquid monomer together with 1g ethylene glycol dimethacrylate and 0.002g azobisisobutyronitrile in 100mL methanol, stir at 70°C for 48h, and then use acetone Precipitate, then wash and filter with tetrahydrofuran and deionized water respectively, and dry under vacuum for 12 hours to obtain a cross-linked polymer stabilizer (abbreviated as CLP). Finally, sodium borohydride is quickly added CLP was mixed in a deionized aqueous solution with a mass ratio of 1:1~1:50 (the concentration of chloroauric acid was 1mM) and stirred until the color of the solution changed from orange to brownish red, and the average par...
Embodiment 2
[0024] Embodiment 2: the preparation of nanocrystalline titanium dioxide colloid
[0025] Add 14g of titanium isopropoxide dropwise to 50mL of deionized water, stir the reaction for 2 hours at room temperature to fully form a white precipitate, filter the formed white precipitate and transfer it to a round bottom reaction bottle, and slowly add an equivalent amount of tetramethyl Aqueous solution of ammonium hydroxide, vigorously stirred in an oil bath at 120°C for 3 hours, cooled to room temperature naturally, transferred the white colloid obtained from the reaction to an autoclave and fixed the volume to 100mL, hydrothermally treated at 220°C for 10 hours and cooled naturally , taken out and subjected to ultrasonic treatment for 20 minutes to obtain milky white nano-titanium dioxide sol. Titanium dioxide nanoparticles prepared under these conditions are in the anatase crystal form ( figure 1 Curve 2), the particle size is about 20nm
Embodiment 3
[0026] Example 3: Preparation of nano-TiO thin film and performance characterization of dye-sensitized solar cell
[0027] Using the nano-titanium dioxide sol prepared in Example 2, a sol film is formed on the cleaned conductive glass by spin coating or screen printing, and the dried film is placed in a muffle furnace, and the temperature is slowly raised to 480°C and kept warm 2h, after natural cooling, the nano-titanium dioxide film can be obtained.
[0028] According to the conventional battery assembly method, the nano-titanium dioxide film was used as a photoanode to assemble DSSCs, and the battery area was 0.25 cm 2 , the current density-voltage (J-V) curve of the dye-sensitized solar cell was measured under AM1.5 simulated sunlight ( image 3 As shown in curve 1), the open circuit photovoltage is 766mV, and the short circuit photocurrent is 9.66mA / cm 2 , the fill factor is 0.744, and the energy conversion efficiency is 5.5%.
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