A kind of lead halide/lead halide perovskite composite micro-nano material and preparation method thereof
A technology of lead halide and halide perovskite, applied in the field of ultra-stable lead halide/lead-based halide perovskite micro-nano composite structure, can solve problems such as poor environmental stability of perovskite, and achieve optical Adjustable performance and shape, economical and simple effect
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Embodiment 1
[0034] (1) At room temperature, weigh 0.15mmol PbBr 2 The powder was dissolved in 750 μl N,N-dimethylformamide (DMF), and a clear solution was obtained after magnetic stirring for 5 minutes.
[0035] (2) Add 75 μl of oleic acid and 375 μl of oleylamine to the above solution in sequence, and continue to stir until the solution is uniform.
[0036] (3) Weigh 3.0 μmol of CsBr powder and dissolve it in the solution of (2), and continue stirring until the solution is uniform.
[0037] (4) Use a pipette gun to measure 700 μl of the solution of (3) above and quickly inject it into 10 ml of toluene. After vigorous stirring for 15 s, the stirring was stopped. Seal the toluene mixture and let it stand for 24h.
[0038] (5) Transfer the above mother liquor to a centrifuge tube and centrifuge for 5 minutes at a centrifugation speed of 6000 rpm. Then wash three times with toluene to obtain OAm 2 Cs n-1 Pb n Br 3n+1 @Pb(OH)Br(n≥1, OAm is oleylamine) composite material. It was then ...
Embodiment 2
[0041] (1) At room temperature, weigh 0.15mmol PbBr 2 The powder was dissolved in 750 μl N,N-dimethylformamide (DMF), and a clear solution was obtained after magnetic stirring for 5 minutes.
[0042] (2) Add 75 μl of oleic acid and 375 μl of oleylamine to the above solution (1) in sequence, and continue stirring until the solution is uniform.
[0043] (3) Weigh 1.5 μmol, 3.0 μmol, 4.5 μmol, 7.5 μmol, and 10.5 μmol of CsBr powder and dissolve them in the solution of (2) above, and continue stirring until the solution is uniform.
[0044] (4) Use a pipette gun to measure 700 μl of each of the solutions in (3) above and inject them into 10 ml of toluene. After vigorous stirring for 15 s, the stirring was stopped. Seal the toluene mixture and let it stand for 24h.
[0045] (5) Transfer the above mother liquors to centrifuge tubes and centrifuge for 5 minutes at a centrifugation speed of 6000 rpm. Then wash three times with toluene to obtain OAm 2 Cs n-1 Pb n Br 3n+1 @Pb(OH...
Embodiment 3
[0048] (1) At room temperature, weigh 0.15mmol PbBr 2 The powder was dissolved in 750 μl N,N-dimethylformamide (DMF), and a clear solution was obtained after magnetic stirring for 5 minutes.
[0049] (2) Add 75 μl of oleic acid and 375 μl of oleylamine to the above solution in sequence, and continue to stir until the solution is uniform. Weigh 3.0 μmol CsBr powder and dissolve it in the above solution (2), and continue to stir for 5 minutes.
[0050] (3) Use a pipette gun to measure 700 μl of the solution of (3) above and quickly inject it into 10 ml of toluene. After vigorous stirring for 15 s, the stirring was stopped. The toluene mixture was sealed and allowed to stand.
[0051] (4) After standing for 10s, 10min, 1h, 6h, 12h, 16h, 24h respectively, the above mother liquor was transferred to a centrifuge tube and centrifuged for 10min, and the centrifugation speeds were 20000rpm, 20000rpm, 15000rpm, 10000rpm, 8000rpm, 6000rpm, 6000rpm respectively. Then wash three times wi...
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