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Method for preparing copper-zinc-tin-selenium ink

A technology of copper, zinc, tin, selenium and ink, which is applied in the field of solar cells and can solve problems such as human body and environmental hazards

Active Publication Date: 2014-09-03
浙江弘康半导体技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of highly toxic hydrazine, it is very harmful to the human body and the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] According to the chemical equivalent ratio of Cu0.98Zn0.5Sn0.5Se2.5, the raw materials are: copper powder, zinc powder, tin powder, selenium powder, copper selenide, zinc selenide and tin selenide, all of which are 325 mesh powders. The planetary rolling wet ball mill is adopted, the ratio of ball to material is 3:1; the ratio of alcohol to powder: 1:10; the grinding time is 30h; the rotation speed is 4500rpm; the revolution speed is 750rpm. Centrifuge at 2000rpm for 10min to obtain particles of 5-15nm and 200-400nm. Ink solvent components (weight content): 50% toluene, 20% ethanol, 15% polyvinyl alcohol (PVA), 9% ethyl cellulose (EC), 3% polyvinyl acetate (PVAc), 3% ethylene glycol Alcohol (EG), mixing; taking 10% by weight of 5-15 nanometer particles and adding 90% by weight of 200-400 nanometer powder to obtain copper-zinc-tin-selenium particles; mixing copper-zinc-tin-selenium particles and ink solvent, Ultrasound in an ultrasonic basin for 5 minutes to prepare an ...

Embodiment 2

[0025] According to the chemical equivalent ratio of Cu0.98Zn0.5Sn0.5Se2.5, the raw materials are: copper powder, zinc powder, tin powder, selenium powder, copper selenide, zinc selenide and tin selenide, all of which are 325 mesh powders. The planetary rolling wet ball mill is adopted, the ratio of ball to material is 8:1; the ratio of alcohol to powder is 1:2; the grinding time is 10h; the rotation speed is 150rpm; the revolution speed is 400rpm. Centrifuge at 8000rpm for 30s to obtain particles of 5-15nm and 200-400nm. Ink solvent components (weight content): 65% toluene, 20% ethanol, 5% polyvinyl alcohol (PVA), 4% ethyl cellulose (EC), 3% polyvinyl acetate (PVAc), 3% ethylene glycol Alcohol (EG), mixing; taking 10% by weight of 5-15 nanometer particles and adding 90% by weight of 200-400 nanometer powder to obtain copper-zinc-tin-selenium particles; mixing copper-zinc-tin-selenium particles and ink solvent, Ultrasound in an ultrasonic basin for 1 h to prepare an ink, the ...

Embodiment 3

[0028] According to the chemical equivalent ratio of Cu0.98Zn0.5Sn0.5Se2.5, the raw materials are: copper powder, zinc powder, tin powder, selenium powder, copper selenide, zinc selenide and tin selenide, all of which are 325 mesh powders. The planetary rolling wet ball mill is adopted, the ratio of ball to material is 5:1; the ratio of alcohol to powder is 3:10; the grinding time is 20h; the rotation speed is 3000rpm; the revolution speed is 600rpm. Centrifuge at 6000rpm for 5min to obtain particles of 5-15nm and 200-400nm. Ink solvent components (weight content): 50% toluene, 35% ethanol, 5% polyvinyl alcohol (PVA), 4% ethyl cellulose (EC), 3% polyvinyl acetate (PVAc), 3% ethylene glycol Alcohol (EG), mixing; taking 10% by weight of 5-15 nanometer particles and adding 90% by weight of 200-400 nanometer powder to obtain copper-zinc-tin-selenium particles; mixing copper-zinc-tin-selenium particles and ink solvent, Ultrasound in an ultrasonic basin for 20 minutes to prepare an...

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Abstract

The invention discloses a method for preparing a copper-zinc-tin-selenium ink. The method comprises steps of: taking raw materials, rolling a wet ball mill in a planetary manner and centrifuging to obtain particles of 5-15 nanometers and 200-400 nanometers; adding 10% of the particles of 5-15 nanometers by weight into 90% of powder of 200-400 nanometers by weight so as to produce copper-zinc-tin-selenium particles; mixing all the components of an ink solvent according to weight contents; and mixing the copper-zinc-tin-selenium particles with the ink solvent, and carrying out ultrasound treatment on a mixture in an ultrasound basin for 5 minutes-1 hour so as to obtain the ink, wherein the weight percent of the copper-zinc-tin-selenium particles and the solvent is 40-80%. The large size nano particles are prepared through a top-down method, and the copper-zinc-tin-selenium ink is also prepared and used for producing copper-zinc-tin-selenium solar cells through a non-vacuum method; various mixtures can directly, mechanical and chemically react at low temperature through adopting a convention ball milling method, and chemical solvents are not needed; the method is green and environment-friendly; and the method adopts no chemical solutions, does not produce wastes, does not need expensive vacuum experiment and is economic and practical.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a method for preparing copper-zinc-tin-selenium ink. Background technique [0002] Copper-zinc-tin-selenium solar cells usually consist of a rigid glass substrate or flexible stainless steel, and also contain a molybdenum layer, a p-type copper-zinc-tin-selenium absorber layer, a cadmium sulfide or a zinc sulfide buffer layer, intrinsic zinc oxide, transparent and conductive Oxide window layer (TCO) and surface contact layer. Copper zinc tin selenium ink is the core of CZTS battery production. At present, the manufacturing methods of copper-zinc-tin-selenide solar cells can be roughly divided into vacuum method and non-vacuum method. Vacuum methods mainly include co-evaporation method and sputtering plus post-selenization treatment method. [0003] Co-evaporation: A common deposition method in both laboratory and commercial applications. The co-evaporation method uses mul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/02H01L31/18C09D11/00
CPCY02P70/50
Inventor 徐从康
Owner 浙江弘康半导体技术股份有限公司