A kind of preparation method of lead halide perovskite
A perovskite and powder technology, applied in chemical instruments and methods, lead compounds, inorganic chemistry, etc., can solve problems such as difficulties in lead halide perovskite, and achieve the effects of avoiding difficult operation, diverse three-dimensional structures, and economical preparation methods
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Embodiment 1
[0026] The preparation process of Pb(OH)Br is as follows figure 1Shown in b: (1) At room temperature, weigh 4 parts of 0.1101g PbBr 2 The powders were dissolved in 1.5mL N,N-dimethylformamide (DMF), and after stirring vigorously for 3min, the solution was clear, which were recorded as A1, B1, C1 and D1, and then 150μL oleic acid (OA ), 10 μL oleylamine (OAM), add 75 μL oleic acid and 75 μL oleylamine to B1 in sequence, add 150 μL oleic acid and 75 μL oleylamine to C1 in sequence, add 150 μL oleic acid and 1000 μL oleylamine to D1 in sequence, and continue stirring A clear solution was obtained.
[0027] (2) Use a pipette to measure 1.4 mL of the clear solutions of A1, B1, C1, and D1 in (1) above, and then quickly add them to 20 mL of toluene, stir vigorously for 10 minutes, and then let stand for 30 hours to obtain the mother liquor.
[0028] (3) After the mother liquors were transferred to centrifuge tubes, high-speed centrifugation was used at a speed of 7000 rpm for 5 min...
Embodiment 2
[0031] (1) At room temperature, weigh 0.1101g PbBr 2 Powder, dissolved in 1.5mL N,N-dimethylformamide (DMF). After vigorous stirring for 3 minutes, the solution was clear, and 150 μL oleic acid and 75 μL oleylamine were added in sequence, and the stirring was continued to obtain a clear solution.
[0032] (2) Use a pipette gun to measure 1.4 mL of the above clear solution, and then quickly add them to 20 mL of toluene respectively, stir vigorously for 10 s, and then let stand for 20 hours to obtain the mother liquor.
[0033] (3) After transferring the mother liquor to a centrifuge tube, use high-speed centrifugation at a speed of 7000 rpm for 5 minutes. Then the precipitate was washed several times with toluene to obtain the diplococcus-like micron-sized Pb(OH)Br self-assembled material.
[0034] Scanning electron microscopy shows that the Pb(OH)Br self-assembled material prepared by the above method has a uniform shape and size distribution, such as figure 2 as shown in ...
Embodiment 3
[0036] (1) At room temperature, weigh 0.1101g PbBr 2 Powder, dissolved in 1.5mL N,N-dimethylformamide (DMF). After vigorous stirring for 3 minutes, the solution was clear, and 150 μL oleic acid and 75 μL oleylamine were added in sequence, and the stirring was continued to obtain a clear solution.
[0037] (2) Use a pipette gun to measure 1.4mL of the above clear solution, and then quickly add them to 20mL of toluene respectively, stir vigorously for 30s, and let stand for 1min, 1h, 3, 10h and 24h respectively to obtain the mother liquor.
[0038] (3) After transferring the mother liquor to a centrifuge tube, use high-speed centrifugation at a speed of 7000 rpm for 5 minutes. Then the precipitate was washed several times with toluene to obtain Pb(OH)Br self-assembled materials under different growth times.
[0039] The Pb(OH)Br self-assembled materials obtained in the above examples under different growth times were tested by scanning electron microscopy to observe in detail ...
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