Chitosan/perovskite nanometer composite film as well as preparation method and application thereof
A nano-composite and chitosan technology, applied in the fields of photoelectrochemistry and polymer chemistry, can solve the problems of poor film-forming properties of perovskite films, and achieve the effects of excellent mechanical properties, clean preparation process and improved filling rate.
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[0034] Example 1
[0035] Weigh 1 g of chitosan and dissolve it in 100 ml of 2% (v / v) hydroiodic acid aqueous solution, stir at 1000 rpm at 0°C for 8 hours, and add sufficient acetone to the solution until no precipitation is precipitated. The obtained precipitate was washed with ether several times until the filtrate was completely colorless, and the solid was chitosan iodide (CS·HI). The obtained solid was placed in a vacuum drying oven at 50°C and dried overnight. The preparation method of methylamine salt is prepared with reference to the literature. Weigh 0.083g methylamine salt and 0.2487g PbI respectively 2 , Dissolved in 2ml of DMF with a density of 0.95g / ml, bubbling in nitrogen for 10 minutes, and stirring at 500 rpm at 60°C for 8 hours in the dark. After the reaction was completed, the resulting solution was filtered with a PTFE filter with a pore size of 0.45 μm. The resulting solution was spin-coated on a glass plate coated with ITO. Determine the UV-Vis spectrum...
Example Embodiment
[0036] Example 2
[0037] Weigh 1 g of chitosan and dissolve it in 100 ml of 2% (v / v) hydroiodic acid aqueous solution, stir at 1000 rpm at 0°C for 8 hours, and add sufficient acetone to the solution until no precipitation is precipitated. The obtained precipitate was washed with ether several times until the filtrate was completely colorless, and the solid was chitosan iodide (CS·HI). The obtained solid was placed in a vacuum drying oven at 50°C and dried overnight. Weigh 0.0004g CS·HI, 0.083g methylamine salt, 0.2487g PbI 2 , Dissolved in 2ml of DMF with a density of 0.95g / ml, bubbling in nitrogen for 10 minutes, and stirring at 500 rpm at 60°C for 8 hours in the dark. After the reaction was completed, the resulting solution was filtered with a PTFE filter with a pore size of 0.45 μm. The resulting solution was spin-coated on a glass plate coated with ITO. Determine the UV-Vis spectrum.
Example Embodiment
[0038] Example 3
[0039] Weigh 1 g of chitosan and dissolve it in 100 ml of 2% (v / v) hydroiodic acid aqueous solution, stir at 1000 rpm at 0°C for 8 hours, and add sufficient acetone to the solution until no precipitation is precipitated. The obtained precipitate was washed with ether several times until the filtrate was completely colorless, and the solid was chitosan iodide (CS·HI). The obtained solid was placed in a vacuum drying oven at 50°C and dried overnight. Weigh 0.0008g CS·HI, 0.083g methylamine salt, 0.2487g PbI 2 , Dissolved in 2ml of DMF with a density of 0.95g / ml, bubbling in nitrogen for 10 minutes, and stirring at 500 rpm at 60°C for 8 hours in the dark. After the reaction was completed, the resulting solution was filtered with a PTFE filter with a pore size of 0.45 μm. The resulting solution was spin-coated on a glass plate coated with ITO. Determine the UV-Vis spectrum.
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