A kind of perovskite quantum dots and preparation method thereof
A perovskite and quantum dot technology, applied in chemical instruments and methods, titanate, titanium compounds, etc., can solve the problems of difficult to achieve large-scale production, complex preparation process, low yield, etc., and achieve industrial application , high purity and simple preparation method
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Embodiment 1
[0071] This embodiment provides a method for preparing perovskite quantum dots, wherein the perovskite quantum dots are Cs 4 PbBr 6 ·CsPbBr 3 Perovskite quantum dot acid-base adduct solution, the specific steps are as follows:
[0072] (1) 0.8 g of Cs with an average size of 700 μm 4 PbBr 6 ·CsPbBr 3 Perovskite crystal material mixed with N-methylpyrrolidone (NMP) to yield Cs 4 PbBr 6 ·CsPbBr 3 Perovskite crystal material concentration of 10mg / mL dispersion;
[0073] (2) ultrasonicating the dispersion liquid obtained in step (1) at a power of 300W for 10h, and then centrifuging the dispersion liquid at a centrifugal speed of 6000r / min for 30min to remove the perovskite crystal particles that are not completely pulverized to obtain Cs 4 PbBr 6 ·CsPbBr 3 Acid-base adduct solution of perovskite quantum dots.
[0074] the Cs 4 PbBr 6 ·CsPbBr 3 The perovskite quantum dots were dispersed droplets onto the hydrophilic treated cover glass for spin coating. The spin coati...
Embodiment 2
[0081] This embodiment provides a method for preparing perovskite quantum dots, wherein the perovskite quantum dots are Cs 4 PbBr 6 ·CsPbBr 3 Perovskite quantum dot acid-base adduct solution, the specific steps are as follows:
[0082] (1) Cs 4 PbBr 6 ·CsPbBr 3 The perovskite crystal material was pretreated by ball milling, and 1 g of Cs with an average size of 700 μm was taken 4 PbBr 6 ·CsPbBr 3 The perovskite crystal material, 20g of silica with an average particle size of 400nm and 100g of agate balls with a diameter of 0.5mm were mixed and ball-milled for 12h. Cs 4 PbBr 6 ·CsPbBr 3 The primary product of perovskite crystal material; it is mixed with N-methylpyrrolidone (NMP) to obtain a dispersion liquid with a concentration of perovskite crystal material of 10 mg / mL;
[0083] (2) ultrasonicating the dispersion obtained in step (1) for 10 hours at a power of 300 W, and then centrifuging the dispersion at a centrifugal speed of 6000 r / min for 30 minutes to remove...
Embodiment 3
[0085] The difference between this example and Example 1 is that the raw materials in step (1) are CsPbBr of equal quality. 3 Substitution of perovskite crystal materials to obtain CsPbBr 3 Acid-base adduct solution of perovskite quantum dots.
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