Preparation method of large-sized perovskite structure CH3NH3PbI3 crystal
A technology of perovskite structure and lead methylamine iodide is applied in crystal growth, chemical instruments and methods, single crystal growth, etc., to achieve the effects of simple synthesis process, simple growth device and less side reactions
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[0025] Example 1
[0026] The preparation method of large-size perovskite structure methamine iodine lead crystal adopts the solution cooling method, and the specific steps are as follows:
[0027] 1) Weigh 0.01mol of PbI 2 ,Use 25ml, 57% HI solution to dissolve at room temperature to get Pb 2+ -HI solution;
[0028] 2) According to HI and CH 3 NH 2 The molar ratio is 1:1. Use a pipette to measure 57% HI solution and 40% CH 3 NH 2 The solution is 2.64ml, 1.72ml, the two solutions are mixed and sealed, placed in an ice water bath at 0℃ for 2h to obtain CH 3 NH 2 I solution;
[0029] 3) At room temperature, the Pb 2+ -HI solution and CH 3 NH 2 When the solution is mixed, a black solid substance is formed immediately. Place the solution in an oil bath at 95°C for preheating for 48 hours;
[0030] 4) Keep the solution temperature at 95℃, filter to remove the black solid material at the bottom. Preheat the resulting clear brown liquid in an oil bath at 96°C for 24 hours as CH 3 NH 3 PbI 3...
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