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Preparation method of Cu2CdSnSe4 nano crystals

A technology of nanocrystals and reactants, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., to achieve the effect of low cost, simple preparation method, and good crystallinity

Inactive Publication Date: 2010-09-08
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, no Cu 2 CdSnSe 4 Reports on the preparation of nanocrystals

Method used

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  • Preparation method of Cu2CdSnSe4 nano crystals
  • Preparation method of Cu2CdSnSe4 nano crystals
  • Preparation method of Cu2CdSnSe4 nano crystals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add 80mmol oleylamine into the three-necked round-bottomed flask reactor, and sequentially add the reactant precursors 1mmol copper acetylacetonate, 0.5mmol cadmium acetate, 0.5mmol tin acetate and 2mmol selenium powder into the reaction flask, and rise in an argon atmosphere. High temperature until all precursors are dissolved. In an atmosphere of argon, the reaction temperature was increased to 300° C. for 15 minutes, and after the reaction was stopped, methanol was added to the cooled reaction product to cause the nanoparticles to settle. Finally, the nanocrystals were collected by centrifugation at 12,000 rpm for 3 minutes.

Embodiment 2

[0018] Add 20mmol oleylamine into the three-necked round-bottomed flask reactor, and sequentially add the reactant precursors 0.5mmol copper acetate, 0.25mmol cadmium acetate, 0.25mmol tin acetate and 1mmol trioctylphosphine selenium into the reaction flask, Increase the temperature in the atmosphere until the precursors are completely dissolved. In an atmosphere of argon, the reaction temperature was raised to 290° C. for 20 minutes, and after the reaction was stopped, methanol was added to the cooled reaction product to cause the nanoparticles to settle. Finally, the nanocrystals were collected by centrifugation at 10,000 rpm for 5 min.

Embodiment 3

[0020] Add 200mmol oleylamine into the three-necked round-bottomed flask reactor, and sequentially add the reactant precursors 10mmol copper acetylacetonate, 2.5mmol cadmium chloride, 2.5mmol tin acetate and 10mmol selenourea into the reaction flask, in an argon atmosphere Raise the temperature until all the precursors are dissolved. In an atmosphere of argon, the reaction temperature was increased to 280° C. for 35 minutes, and after the reaction was stopped, methanol was added to the cooled reaction product to cause the nanoparticles to settle. Finally, the nanocrystals were collected by centrifugation at 8000 rpm for 8 min.

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Abstract

The invention discloses a preparation method of low-cost and high-quality Cu2CdSnSe4 nano crystals. The method comprises the following steps of: adding oleamide, acetylacetone acid copper, cadmium acetate, tin acetate and selenium powder which are reactant precursors into a reaction flask; then raising the temperature for reacting; and finally obtaining the high-quality Cu2CdSnSe4 nano crystals. The invention has the advantages that the preparation method of the nano crystals is simple; the used precursor materials have low cost; and the prepared nano crystal granules have better dispersity and crystallinity, and the like. The nano crystals prepared by using the method can be used as materials of thermoelectric devices.

Description

technical field [0001] The invention belongs to the field of thermoelectric materials, and specifically refers to a Cu 2 CdSnSe 4 Preparation methods of semiconductor nanocrystals. Background technique [0002] As early as the 19th century, the French physicist Peltier discovered the thermoelectric effect, which means that conductors of different materials are connected, and heat will be absorbed or released at the contact points of different conductors after the current is applied. However, due to the generally low thermoelectric conversion efficiency of metals, it has not been quickly converted into applications. It was not until the 1950s that some semiconductor materials with excellent thermoelectric conversion properties were discovered, especially after Freon refrigerants were banned, that the research on thermoelectric materials became a hot topic. [0003] The performance of thermoelectric materials is closely related to their inherent physical parameters. The com...

Claims

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Application Information

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IPC IPC(8): C01B19/00
Inventor 刘玉峰陈鑫葛美英吴杰孙艳戴宁
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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