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Method for synthesizing mono-dispersed multicomponent compound nanocrystals

A compound and monodisperse technology, applied in chemical instruments and methods, single crystal growth, single crystal growth, etc., can solve the problems of high production cost, low production efficiency, and inability to synthesize more than binary compounds, so as to reduce pollution and waste , Reduce production costs, shorten the effect of reaction time

Inactive Publication Date: 2011-06-29
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the defects of low production efficiency, high production cost, and inability to synthesize more than binary compounds in monodisperse compound nanocrystalline materials used in solar cells prepared by two-phase methods, the purpose of the present invention is to propose a method for synthesizing monodisperse multi-component compound nanocrystals The method is a "new two-phase method"

Method used

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  • Method for synthesizing mono-dispersed multicomponent compound nanocrystals
  • Method for synthesizing mono-dispersed multicomponent compound nanocrystals
  • Method for synthesizing mono-dispersed multicomponent compound nanocrystals

Examples

Experimental program
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Effect test

Embodiment 1

[0029] First, add 0.25mmol of zinc acetate, 0.25mmol of stannous chloride and 0.5mmol of copper chloride into 30mL of triethylene glycol, and under the protection of argon (or nitrogen, helium, neon), heat the solution to 100- 160°C for 30 minutes to remove water and oxygen therein, and then heated to 220°C to prepare the alcohol phase metal source mixed solution.

[0030] Dissolve 1mmol of sulfur powder in 2mL of octadecene at 120°C, and then add 0.5g of octadecylamine to this solution to form an oil phase solution; quickly inject this oil phase solution into the above-mentioned alcohol phase metal source mixed solution, The solution turned black immediately, and after keeping the reaction for 1 hour, it was cooled naturally. After the solution is cooled to room temperature, the layers will be separated automatically. The upper layer is drawn out with a needle, and 10 mL of ethanol (ethanol can be replaced by methanol or acetone) is added, and centrifuged to make it precipita...

Embodiment 2

[0032] All the reaction raw materials and operating methods used are the same as in Example 1, except that the sulfur injection temperature is increased to 240°C to obtain monodisperse Cu 2 ZnSnS 4 Nanocrystalline.

Embodiment 3

[0034]All the reaction raw materials and operating methods used are the same as in Example 1, except that the sulfur injection temperature is increased to 280°C to obtain monodisperse Cu 2 ZnSnS 4 Nanocrystalline.

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Abstract

The invention relates to a method for preparing a compound nanocrystal material for a solar cell, in particular to a novel method for synthesizing mono-dispersed multicomponent compound nanocrystals. The method can be typically applied to synthesis of chalcopyrite compounds, and comprises the following steps of: quickly injecting an oil phase solution containing a sulfur source into 180-280DEG C alcohol phase solution containing a metal source, reacting for 2 to 60 minutes, naturally cooling, and washing to obtain oil soluble multicomponent compound nanocrystal particles with narrow particle size distribution. The invention provides a two phase process for synthesizing the multicomponent compound nanocrystals for the first time. Expensive and toxic organic metals are not needed to be used in the method; and common inorganic metal salt is taken as the metal source, the reaction steps are simplified, the reaction time is greatly shortened, the production cost is reduced and the pollution is lightened, so that the method is an environment-friendly method with universality. Through the method, binary compounds, tertiary compounds, quaternary compounds and even penta-compounds can be synthesized.

Description

technical field [0001] The invention relates to a method for preparing compound nanocrystal materials used in solar cells, in particular to a universal method for synthesizing monodisperse multi-component compound nanocrystals. Background technique [0002] Chalcopyrite compounds have a high absorption coefficient (10 4 cm -1 ) and tunable bandgap (1.0-1.7eV) and are widely used in solar cells and show good performance. e.g. Cu(InGa)Se 2 The power conversion efficiency of thin-film solar cells has reached 19%. At present, methods such as vapor phase deposition, magnetron sputtering, electrochemical and chemical solution deposition are usually used to prepare such multi-component compound semiconductor thin films. The manufacturing process of these methods is very complicated and requires high equipment, which makes the production cost high. . On this basis, nanocrystalline solar cells came into being. It uses a completely different method from the previous technologies,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B7/14C30B29/46
Inventor 赵家龙王秀英宋再成
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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