Single-particle nano heterojunction interface modified inorganic perovskite battery and preparation method thereof
A technology of interface modification and interface modification layer, applied in the field of solar cells, can solve problems such as speeding up solar cells
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Embodiment 1
[0038] This embodiment includes the following steps:
[0039] (1) Preparation of transparent conductive substrate: Clean the transparent FTO conductive etched glass with deionized water, absolute ethanol, and isopropanol by ultrasonic vibration. solvent, and then use ozone to oxidize the organic groups on the surface of the transparent FTO conductive glass to obtain a clean transparent conductive substrate;
[0040] (2) Prepare and clean the titanium dioxide electron transport layer on the transparent conductive substrate obtained in step (1): under nitrogen atmosphere, spin-coat 100 μL tetratitanate on the transparent conductive substrate by spin coating method at 2000 rpm for 30 s isopropyl ester to form a uniform film, put it in a muffle furnace, and bake at a high temperature of 500 ° C for 30 minutes to form dense TiO 2 layer, rinse the dense TiO with absolute ethanol 2 The surface of the layer was dried at 120°C; then 100 μL of 18NRT slurry was spin-coated on the dense...
Embodiment 2
[0049] The difference between this example and Example 1 is that in step (4), the CsPbI 2 Br inorganic perovskite precursor solution replaced by CsPbI 3 Inorganic perovskite precursor solution, that is, according to the molar ratio of 1:1, CsI, PbI 2 Dissolved in a mixed solution of dimethyl sulfoxide / N,N-dimethylformamide with a mass ratio of 80:20, configured as a precursor solution with a concentration of 0.8M, and stirred at 75°C for 6 hours to obtain uniform CsPbI 3 Inorganic perovskite precursor solution;
[0050] Test the performance of the inorganic perovskite solar cell (unpackaged) modified by the binary nano-heterojunction interface obtained in this example: at room temperature, use a xenon lamp to simulate sunlight with a light intensity of 100 mW / cm 2 , the effective illumination area is 0.17cm 2 The photoelectric conversion efficiency is 17.9%, and the stability test is 1000 hours, and the photoelectric efficiency drops to 78% of the initial value.
Embodiment 3
[0052] The difference between this example and Example 1 is that in step (4), the CsPbI 2 Br inorganic perovskite precursor solution replaced by CsPbIBr 2 Inorganic perovskite precursor solution, that is, according to the molar ratio of 1:1, CsI, PbBr 2 Dissolved in a mixed solution of dimethyl sulfoxide / N,N-dimethylformamide with a mass ratio of 80:20, configured as a precursor solution with a concentration of 0.8M, stirred at 90°C for 3 hours, and obtained uniform CsPbIBr 2 Inorganic perovskite precursor solution;
[0053] Test the performance of the inorganic perovskite solar cell based on single-particle binary nano-heterojunction interface modification obtained in this example: at room temperature, use a xenon lamp to simulate sunlight with a light intensity of 100 mW / cm 2 , the effective illumination area is 0.17cm 2 The photoelectric conversion efficiency is 11.5%, and the stability test is 1000 hours, and the photoelectric efficiency drops to 90% of the initial valu...
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Abstract
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