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AlP quantum dots and preparing method thereof

A technology of quantum dots and phosphorous source, applied in the field of AlP quantum dots and their preparation, can solve the problem that the preparation method of quantum dot products is not available, and achieve the effects of avoiding the interference of emission signals, simple operation and small size distribution.

Active Publication Date: 2017-01-04
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

AlP compound is a semiconductor with the closest band gap to CdS among III-V compounds, but its quantum dot products have not been obtained so far due to limited preparation methods

Method used

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  • AlP quantum dots and preparing method thereof

Examples

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Embodiment 1

[0026] A preparation method of AlP quantum dots, figure 1 It is a schematic diagram of solvothermal synthesis of AlP quantum dots provided by the present invention. Specific steps are as follows:

[0027] (1) Weigh aluminum chloride hexahydrate, tri-o-methylphenylphosphine and HATU with a molar ratio of 1:0.5:0.5, respectively;

[0028] (2) Pour tri-o-methylphenylphosphine and HATU into the polytetrafluoroethylene liner, add an appropriate amount of toluene, put in a magnet and mix evenly on a magnet stirrer;

[0029] (3) After stirring for 20 minutes, add aluminum chloride hexahydrate, and after stirring for 10 minutes, take out the magnet, cover the inner lid, and put it into a stainless steel reaction kettle;

[0030] (4) Place the reaction kettle in a drying oven and heat it to 150° C. for 6 hours, stop heating, and cool it to room temperature naturally in the drying oven;

[0031] (5) Using a circulating water vacuum filter pump to separate the precipitate from the mot...

Embodiment 2

[0035] A preparation method of AlP quantum dots, the specific steps are the same as in Example 1, only the HATU in the raw material in step (1) is replaced by 1-butyl-3-methylimidazolium hexafluorophosphate [BMIM]PF 6 . The resulting quantum dot particles are uniformly dispersed, but the size distribution is slightly larger, with diameters ranging from 1 to 5 nm.

Embodiment 3

[0037] A preparation method of AlP quantum dots, the specific steps are the same as in Example 1, only the tri-o-methylphenylphosphine in the raw material of step (1) is replaced by PCl 5 . The resulting quantum dot particles are uniformly dispersed with a diameter of 1–4 nm. The nanoparticles gradually disappear under the strong electron beam of the high-power transmission electron microscope.

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Abstract

The invention belongs to the technical field of nano materials, and particularly relates to AlP quantum dots and a preparing method thereof. The preparing method includes the steps that aluminum chloride hexahydrate and a phosphorus source are subjected to solvothermal reaction in organic solvent to obtain the AlP quantum dots which are small in size distribution and high in crystallinity degree and are distributed uniformly, wherein the phosphorus source is selected from one or two of tri-o-methylphenylphosphine, triphenylphosphine, phosphorus pentachloride and HATU and [BMIM]PF6. The synthesis method is easy to operate, mild in reaction and high in repeatability; the obtained quantum dots have strong fluorescence-emission in the blue light region after being irradiated with ultraviolet light, can serve as a blue light emitter applied to a light-emitting diode and can also be applied to biomarking and imaging. In addition, the fluorescence Stock displacement of the quantum is large, interference to transmission signals by exciting light can be effectively avoided, and the quantum dots have extraordinary potential advantages in developing novel optoelectronic devices in the future.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to an AlP quantum dot and a preparation method thereof. Background technique [0002] Quantum dots, also known as semiconductor nanocrystals, generally have a particle size between 2 and 100 nm. Due to the quantum confinement effect, the electronic energy level splits from the continuous state in the bulk crystal to discrete energy levels. Compared with traditional dye molecules, quantum dots have many advantages: emission spectrum can be controlled with size, high photostability, wide excitation spectrum and narrow emission spectrum, good biocompatibility, etc. At present, the research of this kind of compounds mainly focuses on II-VI quantum dots, but due to their high biological toxicity, III-V quantum dots have gradually attracted attention. The study of III-V quantum dots helps to understand the quantum confinement effect; the surface modification of organic ...

Claims

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Application Information

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IPC IPC(8): C09K11/70B82Y40/00B82Y20/00
CPCB82Y20/00B82Y40/00C09K11/70
Inventor 朱亮亮赵佩
Owner FUDAN UNIV
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