Preparation method of quantum dot material, quantum dot material and application
A quantum dot material and quantum dot technology, applied in the field of optical display, can solve the problems of long, complicated process flow, and insufficient uniformity of quantum dot dispersion, and achieve the effects of high quality, narrow half-peak width, and high quantum yield.
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[0031] An embodiment of the present invention provides a method for preparing a quantum dot material, comprising the following steps:
[0032] S1. Preparation of precursor capsules
[0033] The capsule has at least two independent loading chambers, the anion precursor and the cation precursor are loaded in different loading chambers, and the melting point of the material used in the capsule is lower than the temperature of blending and extrusion, so that the capsule Melting, the anion and cation precursors are mixed and reacted to obtain quantum dots.
[0034] Specifically, the number of loading chambers on the capsule is not limited, and may be 2, 3, 4, etc. The material of the loading cavity is a general polymer material, which may be the same as that of the plastic masterbatch.
[0035] It should be noted that the capsules with independent loading chambers can be prepared by existing preparation methods, which are not specifically limited here. In some embodiments, capsu...
Embodiment 1
[0058] This embodiment provides a method for preparing a quantum dot material, comprising the following steps:
[0059] (1) Microcapsule structure preparation: preparation figure 1 The microcapsule structure (capsule material is polystyrene PS) is formed by melting polystyrene at high temperature, injecting it into the mold for preparing capsules, and cooling it. The volume of the inner chamber is 0.2 mL, and the volume of the outer chamber is 3 mL.
[0060] (2) Preparation of the first capsule: the cation precursor and the anion precursor are respectively injected into the outer chamber and the inner chamber of the microcapsule structure. The composition of the cation precursor was as follows: 2 mL of octadecene (ODE), 0.25 mL of oleic acid, 0.125 mmol of zinc oxide and 0.025 mmol of cadmium oxide. The composition of the anion precursor is as follows: 0.075 mL of TOP-S (1 mmol / mL), 0.075 mL of TOP-Se (1 mmol / mL).
[0061] (3) Preparation of the second capsule: the cation p...
Embodiment 2
[0064] The only difference from Example 1 is that the temperature of high-temperature blending and extrusion is 220°C.
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