Preparation method of tellurite glass powder for silicon solar battery positive electrode silver paste

A technology of silicon solar cells and tellurite glass, which is applied in cable/conductor manufacturing, circuits, photovoltaic power generation, etc., can solve the problems of environmental and human health hazards, decreased wettability, and increased softening temperature, and can reduce the melting temperature , reduce the coefficient of thermal expansion, and the effect of dense glass structure

Inactive Publication Date: 2016-07-27
SOUTHWEAT UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, the glass powder used in the slurry is generally lead-based glass (PbO-B 2 o 3 -ZnO series, PbO-B 2 o 3 -ZnO-SiO 2 system, etc.), the weight percentage of lead is as high as 50% to 80%, which will cause great harm to the environment and human health in the process of production and subsequent recycling
Lead-based glass used as conductive silver paste has the advantages of low softening temperature, matching thermal expansion coefficient, and good electrical properties. When the lead in these systems is replaced, the chemical stability and wettability of the glass will decrease, and the softening temperature will increase, which is not suitable Ideal binder phase for front side conductive pastes for silicon solar cells

Method used

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  • Preparation method of tellurite glass powder for silicon solar battery positive electrode silver paste
  • Preparation method of tellurite glass powder for silicon solar battery positive electrode silver paste
  • Preparation method of tellurite glass powder for silicon solar battery positive electrode silver paste

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Embodiment 1

[0026] A method for preparing tellurate glass powder for front electrode silver paste of silicon solar cell, the steps are:

[0027] a. Ingredients: TeO 2 、 Bi 2 o 3 、GeO 2 , La 2 o 3 , ZnO as raw material, TeO by mole percentage 2 68mol%, Bi 2 o 3 9.7mol%, GeO 2 14.5mol%, La 2 o 3 mol2.9%, and ZnO4.9mol% weighing ingredients;

[0028] B, fine grinding and drying of mixed materials: according to material (i.e. the total mass of raw materials according to step a batching): ball: dehydrated alcohol is the mass ratio of 1: 3: 1.5, raw material, ball and dehydrated alcohol are dropped into ball mill Ball mill in the equipment for 4 hours (hours), then place the milled slurry in an oven at a temperature of 90°C, and dry for 4 hours to obtain the dried material;

[0029] c. Glass melting: heat the dried material (you can put it in a corundum crucible and heat it in a box-type electric furnace) to a temperature of 1050 ° C, and keep it warm for 80 minutes (minutes), so th...

Embodiment 2

[0032] A method for preparing tellurate glass powder for front electrode silver paste of silicon solar cell, the steps are:

[0033] a. Ingredients: TeO 2 、 Bi 2 o 3 、GeO 2 , V 2 o 5 , La 2 o 3 , ZnO as raw material, TeO by mole percentage 2 63.3mol%, Bi 2 o 3 11.3mol%, GeO 2 13.7mol%, V 2 o 5 4.5mol%, La 2 o 3 mol2.7%, and ZnO4.5mol% weighing ingredients;

[0034] B, mixing and finely grinding and drying: according to the material (i.e. the total mass of raw materials according to step a batching): balls: dehydrated alcohol is a mass ratio of 1: 3.0: 1.5, raw materials, balls and dehydrated alcohol are dropped into the ball mill Ball mill in the equipment for 4 hours (hours), then place the milled slurry in an oven at a temperature of 90°C, and dry for 4 hours to obtain the dried material;

[0035] c. Glass melting: heat the dried material (you can put it in a corundum crucible and heat it in a box-type electric furnace) to a temperature of 1050 ° C, and keep ...

Embodiment 3

[0038] A method for preparing tellurate glass powder for front electrode silver paste of silicon solar cell, the steps are:

[0039] a. Ingredients: TeO 2 、 Bi 2 o 3 、GeO 2 , V 2 o 5 , La 2 o 3 , ZnO as raw material, TeO by mole percentage 2 59.4mol%, Bi 2 o 3 12.7 mol%, GeO 2 12.7mol%, V 2 o 5 8.5mol%, La 2 o 3 mol2.5%, and ZnO4.2mol% weighing ingredients;

[0040] B, mixing and finely grinding and drying: according to the material (i.e. the total mass of raw materials according to step a batching): balls: dehydrated alcohol is a mass ratio of 1: 3.0: 1.5, raw materials, balls and dehydrated alcohol are dropped into the ball mill Ball mill in the equipment for 4 hours (hours), then place the milled slurry in an oven at a temperature of 90°C, and dry for 4 hours to obtain the dried material;

[0041] c. Glass melting: heat the dried material (you can put it in a corundum crucible and heat it in a box-type electric furnace) to a temperature of 1050 ° C, and keep...

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Abstract

The invention discloses a preparation method of tellurite glass powder for silicon solar battery positive electrode silver paste.The preparation method is characterized in that by molar percentage, 40-70% of TeO2, 5-20% of Bi2O3, 5-35% of GeO2, 0-30% of V2O5, 0-35% of B2O3, 1.8-4% of La2O3 and 3-8% of ZnO are weighed and blended, postprocessing steps including mixed material fine grinding and drying, glass melting, secondary fine grinding and the like are conducted, and the tellurite glass powder for silicon solar battery positive electrode silver paste is obtained.By the adoption of the prepared tellurite glass powder, no lead is contained, and it is beneficial to protect the environment and the human health; the tellurite glass powder is good in adaptation to a silicon substrate and silver, is matched with the silicon substrate and silver in coefficient of thermal expansion and is good in chemical stability, moderate in softening temperature and particularly suitable for a binding phase of the silicon solar battery positive electrode silver paste.

Description

technical field [0001] The invention belongs to the preparation of materials for front electrode silver paste of silicon solar cells, and relates to a preparation method of tellurate glass powder for front electrode silver paste of silicon solar cells. It is especially suitable for use in the front electrode (positive electrode) silver paste of silicon solar cells. Background technique [0002] With the shortage of international energy sources, the development of new energy materials has made breakthroughs again and again with the strong support of our country. Among them, as a semiconductor device that converts solar energy into electrical energy - the application of silicon solar cells in energy saving and emission reduction Particularly important. Therefore, the impact of such products on the environment and people's lives in the process of production and recycling has also aroused widespread concern in the society. [0003] The conductive silver paste for the front ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/00H01B13/00H01L31/0224
CPCC03C12/00H01B13/00H01L31/022425Y02E10/50
Inventor 滕元成侯仁义蔡鑫产小华吴浪王晓换
Owner SOUTHWEAT UNIV OF SCI & TECH
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