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A kind of preparation method of low-cost cadmium phosphide quantum dot material

A quantum dot material, cadmium phosphide technology, which is applied in the field of preparation of low-cost cadmium phosphide quantum dot materials, can solve the problems of transportation and storage conditions, no industrialization prospects, difficulty in scaling up synthesis experiments, etc., and achieve easy separation , production cost reduction, and the effect of easy experimental dosage

Inactive Publication Date: 2011-12-07
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Their common weakness is that the precursors are very expensive, and the transportation and storage conditions are harsh, and the synthesis experiment is difficult to scale up, so they do not have industrialization prospects.

Method used

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  • A kind of preparation method of low-cost cadmium phosphide quantum dot material
  • A kind of preparation method of low-cost cadmium phosphide quantum dot material
  • A kind of preparation method of low-cost cadmium phosphide quantum dot material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The preparation method of low-cost cadmium phosphide quantum dot material in the present embodiment is to operate according to the following steps:

[0051] a, Preparation of cadmium precursor

[0052] Put 0.258g of cadmium oxide and 1.3mL of oleic acid in a 25mL three-necked flask, add 15mL of octadecene, vacuumize (0.5-0.05mbar) at room temperature for 30 minutes, then heat to 270°C in a nitrogen atmosphere, and keep warm for 20 minutes to obtain Cadmium oleate solution;

[0053] b. Preparation of cadmium phosphide quantum dots

[0054] The temperature of the obtained cadmium oleate solution is controlled at 60°C, and with the assistance of nitrogen gas flow, the pH 3 gas, pH 3 Flow rate is 2mL / min, carrier gas N 2 The flow rate is 30mL / min, N 2 with PH 3 The flow rate ratio is 15:1, and the insulation reaction is 180min to obtain an octadecene solution of cadmium phosphide quantum dots, with a yield of 97.5%;

[0055] c. Separation and purification

[0056] A...

Embodiment 2

[0058] The preparation method of low-cost cadmium phosphide quantum dot material in the present embodiment is to operate according to the following steps:

[0059] a, Preparation of cadmium precursor

[0060] Put 0.258g of cadmium oxide and 0.8g of lauric acid in a 25mL three-necked flask, add 15mL of octadecene, vacuumize (0.5-0.05mbar) at room temperature for 30 minutes, then heat to 250°C in a nitrogen atmosphere, and keep the temperature for 20 minutes to obtain Cadmium laurate solution;

[0061] b. Preparation of cadmium phosphide quantum dots

[0062] The temperature of the obtained cadmium laurate solution is controlled at 120°C, and with the assistance of nitrogen gas flow, the pH 3 gas, pH 3 Flow rate is 2mL / min, carrier gas N 2 The flow rate is 2mL / min, N 2 with PH 3 The flow rate ratio is 1:1, and the insulation reaction is 120min to obtain an octadecene solution of cadmium phosphide quantum dots, with a yield of 97.0%;

[0063] c, the method for separation a...

Embodiment 3

[0065] The preparation method of low-cost cadmium phosphide quantum dot material in the present embodiment is to operate according to the following steps:

[0066] a, Preparation of cadmium precursor

[0067] Put 0.258g of cadmium oxide and 1.05g of palmitic acid in a 25mL three-necked flask, add 15mL of octadecene, vacuumize (0.5-0.05mbar) at room temperature for 30 minutes, then heat to 260°C in a nitrogen atmosphere, and keep the temperature for 20 minutes to obtain Cadmium palmitate solution;

[0068] b. Preparation of cadmium phosphide quantum dots

[0069] The temperature of the resulting cadmium palmitate solution is controlled at 180°C, and with the assistance of nitrogen gas flow, the pH 3 gas, pH 3 Flow rate is 2mL / min, carrier gas N 2 The flow rate is 20mL / min, N 2 with PH 3 The flow rate ratio is 10:1, and the heat preservation reaction is 30min to obtain an octadecene solution of cadmium phosphide quantum dots, with a yield of 97.3%;

[0070] c, the method ...

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Abstract

The invention discloses a preparation method of a low-cost cadmium phosphide quantum dot material. The preparation method comprises the following steps: based on a cheap cadmium compound such as cadmium oxide, cadmium acetate or cadmium cetylacetonate and the like as a raw material, dissolving the cadmium compound and long-chain fatty acid in octadecylene at a high temperature so as to prepare a long-chain fatty acid salt of cadmium; or dissolving cadmium cetylacetonate in organic amine, and then carrying out a gas-liquid reaction based on hydrogen phosphide as a phosphorus source so as to prepare the high-quality cadmium phosphide quantum dot luminescent material. According to the invention, a cheap and continuously operable synthesis method is provided for the cadmium phosphide quantum dot material, and a solid foundation is provided for industrialized production of the cadmium phosphide quantum dot material; and through controlling factors such as reaction temperature, time and the like, the luminescence of the cadmium phosphide quantum dot material can be achieved in a wide region ranging from visible light (460nm) to infrared light (1500nm).

Description

1. Technical field [0001] The invention relates to a preparation method of a nanometer material, in particular to a preparation method of a low-cost cadmium phosphide quantum dot material. 2. Background technology [0002] Cadmium phosphide is an important II-V semiconductor material, because cadmium phosphide has a narrow bandwidth (0.55eV), a high dielectric constant (5.8), a large Bohr radius (18nm) and excitation Molecules have the advantages of very light effective mass [1-4], and are expected to be applied in the fields of biomarkers, fluorescent probes, photoelectric conversion, solar cells, etc. [5-8]. When the size of the semiconductor is smaller than the Bohr radius, the quantum size effect is obvious, the size decreases, and the absorption spectrum peak shows a blue shift. Because cadmium phosphide has a relatively small forbidden band width [3], with the reduction of its physical size, it can achieve a wide range of mediation from the infrared to the visible reg...

Claims

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Application Information

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IPC IPC(8): C09K11/70
Inventor 苗世顶史蒂芬.黑格亚历山大.阿基米勒
Owner HEFEI UNIV OF TECH
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