Inorganic perovskite battery with single particle nano-heterojunction interface modification and preparation method
A technology of interface modification and interface modification layer, which is applied in the field of solar cells and 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: Deionized water, absolute ethanol, and isopropanol were used to clean the transparent FTO conductive etched glass with ultrasonic vibration respectively. After shaking for 30 minutes, the surface organic 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 of tetrakis titanate on the transparent conductive substrate by spin coating method at 2000 rpm for 30 s isopropyl ester to form a uniform film, placed in a muffle furnace, and calcined at a high temperature of 500 ° C for 30 min to form dense TiO 2 layer, the dense TiO was rinsed with absolute ethanol 2 layer surface, d...
Embodiment 2
[0049] The difference between this embodiment and Embodiment 1 is that in step (4), the CsPbI 2 Br inorganic perovskite precursor solution was replaced by CsPbI 3 Inorganic perovskite precursor solution, that is, CsI, PbI in a molar ratio of 1:1 2 Dissolved in a dimethyl sulfoxide / N,N-dimethylformamide mixed solution with a mass ratio of 80:20, configured as a precursor solution with a concentration of 0.8M, and stirred at 75°C for 6h to obtain uniform CsPbI 3 Inorganic perovskite precursor solution;
[0050] Test the performance of the inorganic perovskite solar cell (unpackaged) modified by the binary nanoheterojunction 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 light area is 0.17cm 2 The photoelectric conversion efficiency was 17.9%, and after 1000 hours of stability test, the photoelectric efficiency dropped to 78% of the initial value.
Embodiment 3
[0052] The difference between this embodiment and Embodiment 1 is that in step (4), the CsPbI 2 Br inorganic perovskite precursor solution was replaced by CsPbIBr 2 Inorganic perovskite precursor solution, that is, CsI, PbBr in a molar ratio of 1:1 2 Dissolved in a dimethyl sulfoxide / N,N-dimethylformamide mixed solution with a mass ratio of 80:20, configured as a precursor solution with a concentration of 0.8M, and stirred at 90 °C for 3 hours to obtain a uniform CsPbIBr 2 Inorganic perovskite precursor solution;
[0053] Test the performance of the inorganic perovskite solar cell based on single-particle binary nanoheterojunction 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 light area is 0.17cm 2 The photoelectric conversion efficiency of 11.5%, the stability test 1000 hours, the photoelectric efficiency dropped to 90% of the initial value.
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