Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of cu2znsns4 nanocrystal

A nanocrystal and ortho-salt technology, applied in the field of solar photovoltaic materials, can solve the problems of few nanocrystal reports, and achieve the effects of good crystallinity, low cost, and precise control

Active Publication Date: 2011-11-30
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, so far, Cu 2 ZnSnS 4 There are few reports on the preparation of nanocrystals

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of cu2znsns4 nanocrystal
  • Preparation method of cu2znsns4 nanocrystal
  • Preparation method of cu2znsns4 nanocrystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 80mmol oleylamine into the three-necked round-bottomed flask reactor, and sequentially add the reactant precursors 0.4mmol ethyl xanthate copper, 0.2mmol zinc acetate, and 0.2mmol tin tetrachloride into the reaction flask, and 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 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

[0025] Add 20mmol oleylamine into the three-necked round-bottomed flask reactor, and sequentially add the reactant precursors 0.2mmol copper acetylacetonate, 0.1mmol zinc ethyl xanthate, and 0.1mmol tin acetate into the reaction flask, and in an argon atmosphere Raise the temperature until all the precursors are dissolved. In an atmosphere of argon, the reaction temperature was increased to 270° 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

[0027] Add 200mmol oleylamine into the three-necked round-bottomed flask reactor, and sequentially add the reactant precursors 2mmol copper acetate, 1mmol zinc acetylacetonate, and 1mmol ethylxanthate tin into the reaction flask, and raise the temperature in an argon atmosphere until the precursor is completely dissolved. In an atmosphere of argon, the reaction temperature was increased to 260° 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.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
energy conversion efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing Cu2ZnSnS4 nanocrystals with ethyl xanthate. A kind of ethyl xanthate precursor and oleylamine are added into the reaction flask, and then the temperature is raised to react, and finally high-quality Cu2ZnSnS4 nanocrystals are obtained. The invention has the advantages of simple preparation method of nano crystals, accurate control of element stoichiometric ratio, low cost and non-toxicity of precursor materials used, and good dispersion and crystallinity of prepared nano crystal particles. The nano crystal prepared by the invention can be used as the absorbing layer of the photovoltaic device.

Description

technical field [0001] The invention belongs to the field of solar photovoltaic materials and relates to a Cu 2 ZnSnS 4 Preparation methods of semiconductor nanocrystals. Background technique [0002] With the continuous development of social economy, the energy problem has become a major problem facing the survival and development of all human beings. Photovoltaic technology, which converts solar energy into electrical energy, is an important means to solve energy problems in the future. Reducing device cost and improving device efficiency are the goals pursued by researchers engaged in solar cells. [0003] Advances in the synthesis of high-quality nanocrystals hold great promise for low-cost and high-efficiency solar cell devices. Nanocrystalline solar cells have attracted much attention due to the advantages of low material cost and simple manufacturing process. There have been many studies on Cu 2 S, CdTe, PbSe, CuInS 2 , CuInSe 2 and Cu(In,Ga)Se 2 and other re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01G19/00B82B3/00
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