Inorganic perovskite crystal preparation method and product thereof
A perovskite precursor, inorganic calcium technology, applied in crystal growth, chemical instruments and methods, single crystal growth and other directions, can solve the problems of difficulty in preparing large-sized crystals, difficult to control the preparation process, and high crystal defect density. Inhibition of the effect of perovskite crystal nucleation, high crystal growth success rate, and low defect density
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[0047] Example 1
[0048] Preparation of inorganic perovskite crystals
[0049] The experimental equipment and experimental scenes for preparing inorganic perovskite such as figure 1 As shown, weigh 6mmol CsBr and 6mmolPbBr 2 Add the powder to the reaction vessel 103, then use a pipette to add 10 mL of dimethyl sulfoxide (DMSO), cover the airtight plug 104, close the inlet and outlet 105 and the air outlet 106, put the reaction vessel 103 into the vibrator, and vibrate Half an hour to ensure that the solute is fully dissolved to obtain the perovskite precursor solution 102. Put the reaction vessel 103 containing the perovskite precursor 102 into the constant temperature water bath 101 to ensure that the water bath level is higher than the perovskite precursor solution 102 Surface, the constant temperature water bath 101 is heated to 45°C and kept constant. A constant flow of nitrogen gas is introduced into the air inlet 105, and the nitrogen flow rate is 1.5 L / min. Waiting for th...
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[0054] Example 2
[0055] Preparation of inorganic perovskite crystals
[0056] The experimental equipment and experimental scenes for preparing inorganic perovskite such as figure 1 As shown, weigh 4mmolCsI and 5mmolPbBr 2 Add the powder to the reaction vessel 103, then use a pipette to add 10 mL of dimethylformamide (DMF), cover the airtight plug 104, close the inlet and outlet 105 and the air outlet 106, put the reaction vessel 103 into the vibrator, and vibrate Half an hour to ensure that the solute is fully dissolved to obtain the perovskite precursor solution 102. Put the reaction vessel 103 containing the perovskite precursor 102 into the constant temperature water bath 101 to ensure that the water bath level is higher than the perovskite precursor solution 102 Surface, the constant temperature water bath 101 is heated to 60°C and kept constant. A constant flow of nitrogen is introduced into the air inlet 105, and the flow of nitrogen is 0.8 L / min. Waiting for the crystals...
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[0059] Example 3
[0060] Preparation of inorganic perovskite crystals
[0061] The experimental equipment and experimental scenes for preparing inorganic perovskite such as figure 1 As shown, weigh 5mmol CsBr and 6mmolPbBr 2 Add the powder to the reaction vessel 103, and then use a pipette to add 10 mL of a mixture of butyrolactone (GBL) and dimethylformamide (DMF), cover the airtight plug 104, close the inlet and outlet 105 and the gas outlet 106, Put the reaction vessel 103 into the vibrator and vibrate for half an hour to ensure that the solute is fully dissolved to obtain the perovskite precursor solution 102. Put the reaction vessel 103 containing the perovskite precursor 102 into the constant temperature water bath 101 to ensure the water bath. The surface is higher than the liquid surface of the perovskite precursor solution 102, and the constant temperature water bath 101 is heated to 50°C and kept constant. A constant flow of nitrogen gas was introduced into the air inle...
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