Preparation method of perovskite single crystals
A perovskite and single crystal technology is applied in the field of preparation of perovskite single crystals, which can solve the problems of long time consumption, low solution utilization rate, and large number of crystal nuclei of perovskite single crystals, so as to reduce the number of fine crystal nuclei, The effect of improved utilization and high quality
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[0027] The first embodiment of the preparation method of the perovskite single crystal provided by the present invention, its specific preparation steps are as follows:
[0028] (1) Weigh 1.59g of synthesized methylamine iodide (CH 3 NH 3 I, MAI) and 3.688g lead iodide (PbI) 2 ), dissolved in 10 mL of γ-butyrolactone (GBL), stirred and dissolved at 60 °C for 12-24 h to obtain a perovskite solution;
[0029] (2) Filter the perovskite solution with a 0.45 μm filter;
[0030] (3) Clean the PTFE container with deionized water for 10 minutes, clean the PTFE container with acetone for 10 minutes, clean the PTFE container with isopropanol for 10 minutes, clean the PTFE container with deionized water for 10 minutes, and then dry it with a nitrogen gun;
[0031] (4) Take 10 mL of the filtered perovskite solution and carefully place it in a PTFE container, and heat it on a heating table at 100 °C to slowly evaporate the solvent, the perovskite solution reaches supersaturation, and th...
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[0043] In the fourth embodiment of the method for preparing perovskite single crystal provided by the present invention, the specific preparation steps are as follows:
[0044] (1) Weigh 1.12g of synthesized methylamine bromide (CH 3 NH 3 Br) and 3.688g lead bromide (PbI 2 ), dissolved in 10 mL of a mixed solution of N,N-dimethylformamide (DMF) and γ-butyrolactone (GBL), the volume ratio of N,N-dimethylformamide to γ-butyrolactone is 2:8, stirring and dissolving at 60 °C for 12-14 h to obtain a perovskite solution;
[0045] (2) Filtration with a 0.45 μm filter head to obtain a perovskite solution;
[0046] (3) Clean the PTFE container with deionized water for 10 minutes, clean the PTFE container with acetone for 10 minutes, clean the PTFE container with isopropanol for 10 minutes, clean the PTFE container with deionized water for 10 minutes, and then dry it with a nitrogen gun;
[0047] (4) Take 10 mL of the filtered perovskite solution and place it in a PTFE container and...
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