Semiconductor nanocrystal and preparation method thereof
A nanocrystal and semiconductor technology, applied in the field of semiconductor nanocrystal and its preparation, can solve the problem of high surface area and achieve the effect of improving luminous efficiency
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[0066] The method of preparing the nanocrystals may include mixing the first semiconductor nanocrystals and water. During mixing, the water may be bound by hydration of the first semiconductor nanocrystals.
[0067] The first semiconductor nanocrystal is a semiconductor nanocrystal that does not have a bond with water, and can be prepared by an ordinary wet (solvent) method under an organic solvent. The first semiconductor nanocrystal may have a core structure or a core-shell structure. Here, the core or the shell may be independently formed of a group II-VI semiconductor material, a group III-V semiconductor material, a group IV semiconductor material, or a group IV-VI semiconductor material. In addition, the first semiconductor nanocrystal may be the above-mentioned bare semiconductor nanocrystal, or a bare semiconductor nanocrystal with organic ligands bound to the surface or inside of the bare semiconductor nanocrystal. The organic ligand may be represented by Chemical F...
preparation Embodiment 1
[0102] Preparation Example 1: Preparation of Yellow Luminescent Nanocrystals
[0103] Indium acetate (0.2 mmol) was added to a mixture of palmitic acid (0.6 mmol) and octadecene (10 mL), heated to about 120° C. under vacuum and held at this temperature for about 10 minutes. Meanwhile, about 0.075 mmol of trimethylsilyl-3-phosphine and about 0.45 mmol of trioctylphosphine were mixed with about 0.78 mL of octadecene, thereby preparing an injection solution. The mixture kept under vacuum was heated to about 280° C. under a nitrogen atmosphere, and the injection solution was injected into the heated mixture. The reaction proceeded for about one hour after the injection, and then the mixture was quenched to room temperature. Subsequently, acetone was injected into the quenched mixture, thereby precipitating InP nanocrystals. The precipitate was dissolved in about 1 mL of toluene, thereby preparing an InP nanocrystal solution.
[0104] Zinc acetate (0.3 mmol) was added to a mix...
Embodiment 1-1
[0107] About 0.02 mL of water was added to about 0.3 mL of the InP / ZnS nanocrystal solution prepared according to Preparation Example 1 at about 25° C. under a nitrogen atmosphere and maintained.
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