A kind of large size ultrathin all-inorganic lead halide perovskite nanosheet and its preparation method and application
A large-size, perovskite technology, applied in the direction of inorganic chemistry, nanotechnology, nano-optics, etc., can solve the problem of not reaching the ultra-thin level, achieve the effect of improved transmission mechanism, controllable process, and improved diffusion distance
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Embodiment 1
[0057] (1) 0.1 g of cesium carbonate (0.3 mmol), 0.35 mL (1.1 mmol) of oleic acid and 3.75 mL of octadecene were fully reacted and dissolved under an inert atmosphere at a temperature of 120° C. to obtain solution I;
[0058] (2) 69 mg (0.188 mmol) of lead bromide, 10 mL of oleic acid and 0.5 mL of oleylamine were mixed, and fully dissolved under an inert atmosphere at a temperature of 120° C. to obtain solution II;
[0059] (3) Raise the temperature of solution II to 160°C, inject 0.4 mL of solution I into solution II (10.5 mL), and continue the reaction and stirring;
[0060] (4) The reaction solution is obtained after maintaining the same temperature for 60 min of continuous stirring and reaction, and finally the final product is obtained by centrifugation, separation and washing.
[0061] figure 1 The XRD pattern of the product prepared in this example is observed, and it can be confirmed by observing the XRD pattern that the product is composed of CsPb 2 Br 5 , judging...
Embodiment 2
[0086] (1) fully react and dissolve 0.1 g of cesium carbonate (0.3 mmol), 0.35 mL of oleic acid and 3.75 mL of octadecene under an inert atmosphere at a temperature of 120° C. to obtain solution I;
[0087] (2) 69 mg (0.188 mmol) of lead bromide, 10 mL of oleic acid and 0.5 mL of oleylamine were mixed, and fully dissolved under an inert atmosphere at a temperature of 120° C. to obtain solution II;
[0088] (3) The temperature of solution II was raised to 180°C, 0.4 mL of solution I was injected into solution II (10.5 mL), and the reaction stirring was continued;
[0089] (4) The reaction solution was obtained after maintaining the same temperature for 40 min of continuous stirring and reaction, and finally the final product was obtained by centrifugation, separation and washing.
[0090] Figure 9 The XRD pattern of the product prepared in this example is observed, and it can be confirmed by observing the XRD pattern that the product is composed of CsPb 2 Br 5 , after chara...
Embodiment 3
[0092] (1) fully react and dissolve 0.1 g of cesium carbonate (0.3 mmol), 0.35 mL of oleic acid and 3.75 mL of octadecene under an inert atmosphere at a temperature of 120° C. to obtain solution I;
[0093] (2) 69 mg (0.188 mmol) of lead bromide, 10 mL of oleic acid and 0.5 mL of oleylamine were mixed, and fully dissolved under an inert atmosphere at a temperature of 120° C. to obtain solution II;
[0094] (3) Raise the temperature of solution II to 150°C, inject 0.4 mL of solution I into solution II (10.5 mL), and continue the reaction and stirring;
[0095] (4) The reaction solution is obtained after maintaining the same temperature for 90 min of continuous stirring and reaction, and finally the final product is obtained by centrifugation, separation and washing.
[0096] After testing, the composition of the product prepared in this example is CsPb 2 Br 5 , the morphology is basically the same as that of Example 1, the side length of the nanosheet is about 1 μm, and the t...
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