Tcl Technology Group Corporation

Zhiwen Nie

Yixing Yang

Chengyu Yang

Jielong Qiu

Lei Qian

A quantum dot and its preparation method and application. The method includes the steps of forming a compound quantum dot core first, then adding a precursor of a metal element Mto be alloyed into the reaction system containing the compound quantum dot core. The metal element Mundergoes cation exchange with a metal element Min the existing compound quantum dot core, thereby forming a quantum dot with an alloy core. In this method, the distribution of alloyed components is not only adjusted by changing the feeding ratio of the metal elements and the non-metal elements, but also by a more real-time, more direct, and more precise adjustments through various reaction condition parameters of the actual reaction process, thereby achieving a more precise composition and energy level distribution control for alloyed quantum dots.

Quantum dot, preparation method therefor and use thereof

The present application discloses a composite and its preparation method and application. The composite includes silica-coated quantum dots and graphene nanosheets on the surface of the silica-coated quantum dots; wherein the silica-coated quantum dots include quantum dots and silica layer coated on the surface of the quantum dots. And the graphene nanosheets and the silica layer is bonded by (O&#x2014;)Si&#x2014;R&#x2014;NHCO&#x2014;R&#x2014;CONH&#x2014;R&#x2014;Si(O&#x2014;)or (O&#x2014;)Si&#x2014;R&#x2014;SCHCH&#x2014;R&#x2014;Si(O&#x2014;), R, R, R, Rare respectively selected from a group consisting of a hydrocarbyl or a hydrocarbyl derivative, Ris selected from a hydrocarbyl, a hydrocarbyl derivative, an aryl or an aryl derivative. The composite can further improve the stability of quantum dots without affecting the inherent optical properties of quantum dots, thereby improving luminous efficiency.

Composite and preparation method thereof and application thereof

The present disclosure discloses a quantum dot and a preparation method thereof, the method comprises a plurality of following steps: preparing a quantum dot solution; preparing an ion-containing organic ligand precursor; adding the ion-containing organic ligand precursor into the quantum dot solution, and making a surface-modification to the quantum dots, before obtaining the quantum dots having the surfaces modified; or providing a quantum dot solution; providing an ion-containing organic ligand precursor; mixing the ion-containing organic ligand precursor and the quantum dot solution, to make a ligand exchanging, before centrifuging and obtaining the quantum dots having the ligand exchanged.

Quantum dot and preparation method thereof

The present disclosure provides a quantum dot. The quantum dot includes a group III-V quantum dot core, and at least one type of halide ions, acetylacetonate ions, or hydroxyl ions bound to a surface of the group III-V quantum dot core, where the halide ions, the acetylacetonate ions and the hydroxyl ions are bound with group III cations on the surface of the group III-V quantum dot core.

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Zhiwen Nie