Radial all-inorganic perovskite nanomaterial and preparation method thereof
A nano-material and radial technology, applied in the field of perovskite materials and its preparation, can solve the problems of many surface defects, unfavorable effective separation of electrons and holes, and instability of zero-dimensional perovskite materials, achieving large specific surface area, The effect of improving photoelectric performance
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[0046] Example 1
[0047] (1) 0.1g of cesium carbonate (0.3mmol), 0.3mL (1mmol) of oleic acid and 3.75mL of octadecene were fully reacted and dissolved under an inert atmosphere at a temperature of 120°C to obtain solution I;
[0048] (2) Mix 69mg (0.188mmol) of lead bromide, 0.5mL (1.5mmol) of oleic acid and 10mL (0.03mol) of oleylamine, and fully dissolve in an inert atmosphere at a temperature of 120°C to obtain solution II;
[0049] (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;
[0050] (4) Keep the same temperature and continue to stir the reaction for 12 hours to obtain the reaction solution, and finally obtain the final product by centrifugation, separation and washing.
[0051] figure 1 This is the XRD pattern of the product prepared in this example. Observing the XRD pattern can confirm that the composition of the product is CsPbBr 3 , Judging from the diffraction peak intensity...
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[0066] Example 2
[0067] (1) 0.1g (0.3mmol) of cesium carbonate, 0.35mL (1.1mmol) of oleic acid and 3.75mL of octadecene were fully reacted and dissolved under an inert atmosphere at a temperature of 120°C to obtain solution I;
[0068] (2) 69mg (0.188mmol) of lead bromide and 0.5mL (1.5mmol) of oleic acid are dissolved in 10mL (0.03mol) of oleylamine in an inert atmosphere at a temperature of 120℃ to obtain solution II;
[0069] (3) Raise the temperature of solution II to 150°C, inject 0.4 mL of solution I into solution II, and continue the reaction and stirring;
[0070] (4) Keep the same temperature and continue to stir the reaction for 12 hours to obtain the reaction solution, and finally obtain the product after centrifugation, separation and washing.
[0071] Image 6 This is the SEM image of the product prepared in this example. It can be seen from the figure that the product CsPbBr prepared at 150°C 3 It has a single-sided radial perovskite structure and is composed of about 10...
Example Embodiment
[0072] Example 3
[0073] (1) 0.1g (0.3mmol) of cesium carbonate, 0.35mL (1.1mmol) of oleic acid and 3.75mL of octadecene were fully reacted and dissolved under an inert atmosphere at a temperature of 120°C to obtain solution I;
[0074] (2) 69mg (0.188mmol) of lead bromide and 0.5mL (1.5mmol) of oleic acid were dissolved in 5mL (0.015mol) of oleylamine under an inert atmosphere at a temperature of 120°C to obtain solution II;
[0075] (3) Raise the temperature of solution II to 180°C, inject 0.4 mL of solution I into solution II, and continue the reaction and stirring;
[0076] (4) Keep the same temperature and continue to stir the reaction for 12 hours to obtain the reaction solution, and finally obtain the product after centrifugation, separation and washing.
[0077] After testing, the morphology of the product prepared in this example is basically the same as that of Example 1.
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