Preparing method for methylamine bromide lead crystals of large-size perovskite structure
A technology of perovskite structure and lead methylamine bromide, which is applied in crystal growth, chemical instruments and methods, single crystal growth, etc., to achieve the effects of less side reactions, simple synthesis process, and simple growth device
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[0026] The preparation method of large-scale perovskite structure methylammonium bromide lead crystal, the steps are as follows:
[0027] 1) Weigh 0.01mol of PbBr 2 , with 25ml of HBr solution with a mass concentration of 48% dissolved at room temperature to prepare Pb 2+ - HBr solution;
[0028] 2) According to HBr and CH 3 NH 2 The molar ratio is 1:1, respectively measure the HBr solution with a mass concentration of 48%, and the CH with a mass concentration of 40%. 3 NH 2 Each solution was 2.32ml, 1.72ml, the two solutions were mixed and sealed, and placed in an ice-water bath at 0°C for 2h to obtain CH 3 NH 2 Br solution;
[0029] 3) At room temperature, the Pb 2+ -HBr solution with CH 3 NH 2 The Br solution was mixed, and an orange-red solid substance appeared at the bottom immediately, and the solution was preheated in a 70°C water bath for 48 hours;
[0030] 4) While keeping the solution temperature at 70°C, remove the orange-red solid substance by filtration...
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