Device and method for recycling hot gas and reaction liquid in thin-film deposition by water-bath method

A technology of hot gas circulation and reaction liquid, applied in electrical components, liquid chemical plating, climate sustainability, etc., can solve the problems of limited development and application, easy loss of ammonia water, waste of raw materials, etc., to shorten time and reduce heterogeneity. The effect of reaction and temperature uniformity

Active Publication Date: 2017-10-27
旭科新能源股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the production cost of copper indium gallium selenide thin-film solar cells, the cost of the buffer layer accounts for about 20% of the cost of the cell, so the buffer layer plays a very important role. There are many methods for making the buffer layer, among which the chemical water bath deposition method is the most common. The advantages are simple equipment and process, low cost, and uniform and dense film formation; however, ammonia water, one of the raw materials in the water bath method, is easily lost under high temperature conditions, resulting in a series of problems such as waste of raw materials and waste gas treatment, which limits the preparation of films by the water bath method. development and application

Method used

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  • Device and method for recycling hot gas and reaction liquid in thin-film deposition by water-bath method
  • Device and method for recycling hot gas and reaction liquid in thin-film deposition by water-bath method
  • Device and method for recycling hot gas and reaction liquid in thin-film deposition by water-bath method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Preparation of flexible substrate: A polyimide film (PI) with a thickness of 50 μm was selected as the substrate of the flexible thin film solar cell module, and a uniform 0.5 μm layer was plated on the substrate by the measurement and control sputtering method and the vacuum thermal evaporation method. A Mo layer and a 1.5 μm CIGS layer were used to fix the substrate on the transport device.

[0044] (2) Preparation of reaction solution: Mix zinc sulfate, ammonia water, thiourea, hydrazine, and ultrapure water in a certain proportion to make a reaction solution, and then add it to the mixing box. The concentration of Zn2+ in the reaction solution is 0.02M; the concentration of ammonia water is 1M, the concentration of thiourea is 0.01M, and the concentration of hydrazine is 0.15M.

[0045] (3) Hot gas recycling device: Turn off the hot gas recycling device, and the gas in the reaction tank is directly discharged without circulation.

[0046] (4) Deposition of ZnS:...

Embodiment 2

[0049] (1) Preparation of flexible substrate: the same as in Example 1.

[0050] (2) Preparation of reaction solution: Same as Example 1.

[0051] (3) Hot gas recycling device: Turn on the hot gas recycling device, set the hot air pressure to 3~5 KPa, and the gas in the reaction tank starts to recover and circulate.

[0052] (4) Deposition of ZnS: pump the reaction liquid to the reaction tank through the reaction liquid pump, set the flow rate to 3~10 L / min, set the temperature of the heating plate to 350 °C, the width of the reaction tank is about 350 mm, and the length of the reaction tank is about 350 mm. 6 m, the flexible substrate conveying speed is 0.1-1.5 m / min, and a high-quality ZnS film with uniform thickness can be obtained at the back end of the reaction tank in 30 min.

[0053] If the hot gas recycling device is turned on, the hot gas will be recycled and not discharged directly. After about 30 minutes, the pH value of the reaction solution will be stable at abou...

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Abstract

The invention discloses a device and method for recycling hot gas and reaction liquid in thin-film deposition by a water-bath method. The device comprises a reaction groove body, a hot-gas circulating blowing device, gas exhausting units, a gas feeding unit and a heating device, wherein the reaction groove body comprises a reaction groove and a reaction-groove upper cover; the hot-gas circulating blowing device is positioned at the outer part of the reaction groove body and comprises a hot-gas circulating blower for hot-gas circulation, an air door for adjusting the gas amount, a pressure gauge for measuring the air pressure and a multi-pipeline gas exhausting device for distributing gas; the gas exhausting units are arranged above the two sides of the reaction groove body and comprise gas exhausting holes, gas feeding pipes, gas feeding air-amount adjusting valves, heat-resistant air pipes and pipe bundles; the heating device is positioned above the reaction groove; a heater is arranged at the upper part of the reaction groove and can heat the reaction liquid by a radiation heating mode; and then a flexible substrate is conveyed onto the reaction liquid in the reaction groove by a conveying device so as to realize thin-film deposition.

Description

technical field [0001] The invention relates to a novel and environmentally friendly method for preparing a buffer layer film in the manufacture of solar cells, in particular to a method for recycling the hot gas and reaction liquid of a copper-indium-gallium-selenide flexible film battery for pollution-free water bath deposition of films. The device and the method belong to the important part of the second-generation solar cell production technology field. Background technique [0002] In the next 20 to 25 years, oil production will peak, after which it will start to decline. The development of developing countries will accelerate oil consumption, and the whole world will face oil energy depletion, high cost and environmental problems. Therefore, the development and increasing demand of renewable energy sources such as solar cells will play an important role in the coming decades. [0003] Copper indium gallium selenide (Cu(In, Ga)Se2, CIGS for short) thin film solar cell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/12H01L31/18
CPCH01L31/18C23C18/1204Y02P70/50
Inventor 李敏钱喆瑜张情情钟华良朱家宽刘杰鹏高锦龙
Owner 旭科新能源股份有限公司
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