Preparation method and application of ⅱ-ⅲ-ⅴ-ⅵ alloy quantum dots
A quantum dot, II-III-V-VI technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, luminescent materials, etc., can solve the problem of narrow half-peak width and difficult Alloy quantum dots, it is difficult to avoid Ⅲ-Ⅴ separate nucleation and other problems
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[0033] The preparation method of II-III-V-VI alloy quantum dot provided by the present invention comprises:
[0034] (1) The first precursor containing elements of subgroup II, the second precursor containing elements of main group III, the third precursor containing elements of main group V, and the fourth precursor containing elements of main group VI The body and the ligand are mixed to form a precursor solution A, and the precursor solution A is heated so that the precursor solution A reacts to form a II-III-V-VI nanocluster complex solution;
[0035] (2) Mix and heat the II-III-V-VI nanocluster complex solution with an activator to react to obtain II-III-V-VI alloy quantum dots.
[0036] In step (1), the precursor solution A can undergo preliminary reactions during the heating process, including the preliminary reaction of the highly active third precursor and the second precursor to nucleate to form III-V monomers, the first precursor, the fourth Precursors and ligands ...
Embodiment 1
[0067] 0.3 mmol In(Ac) 3 (Indium acetate), 0.6mmol Zn(Ac) 2 (zinc acetate), 2.1 mmol hexadecanoic acid and 12 mLODE (octadecene) were added to a 100 mL three-necked flask, and the three-necked flask was placed under N 2Heated to 180°C under exhausted state, kept at 180°C for 30min, then lowered to 30°C, and then added 0.15mmol TMS-P (tris(trimethylsilyl)phosphorus), 0.3mmol S-ODE and 1.5mmol TOP (trimethylsilicon) octylphosphine) to form a precursor solution A, and then the temperature was raised to 50° C. for 30 min to form an InZnPS nanocluster complex solution, which was lowered to room temperature for use. like figure 1 As shown, the InZnPS nanocluster complex solution began to lift at 400 nm in the UV absorption spectrum, but there was no obvious exciton peak, as shown in figure 2 As shown, the transmission electron microscope (TEM) shows that the InZnPS nanoclusters are about 1 nm, indicating that the crystallization is incomplete and the nanocluster composite struct...
Embodiment 2
[0071] 0.3 mmol In(Ac) 3 , 0.3mmol Zn(Ac) 2 , 1.5mmol hexadecanoic acid and 12mL ODE were added to a 100mL three-necked flask, and the three-necked flask was placed in N 2 Heated to 180°C under exhausted state, kept at 180°C for 30 min, then lowered to 30°C, and then added 0.3 mmol TMS-P, 0.6 mmol S-ODE and 3 mmol TBP (tributylphosphine) to form precursor solution A, and then The temperature was raised to 80° C. for 30 min to form an InZnPS nanocluster complex solution, which was cooled to room temperature for use.
[0072] 15mL of octadecene was added to a 50mL three-necked flask, and the three-necked flask was placed in N 2 The mixture was heated to 250°C in the exhausted state, injected with a mixture of InZnPS nanocluster complex solution containing 0.15mmol In element and 15mmol of dioctylamine, and kept at 250°C for 10min to obtain an InZnPS alloy quantum dot solution. Fluorescence emission and transmission electron microscopy tests were performed on the InZnPS alloy ...
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