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Glass powder and its preparation method and conductive paste for solar cell

A glass powder and raw material technology, which is applied to conductive materials, circuits, and electrical components dispersed in non-conductive inorganic materials, can solve problems such as environmental hazards, lead in glass powder, and low photoelectric conversion efficiency, and achieve cost savings, The effect of easy source and high photoelectric conversion efficiency

Active Publication Date: 2012-05-30
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention solves the disadvantages that the glass powder in the prior art contains lead and / or boron, which is harmful to the environment and has low photoelectric conversion efficiency

Method used

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  • Glass powder and its preparation method and conductive paste for solar cell

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preparation example Construction

[0026]The present invention provides the preparation method of above-mentioned glass powder, comprises the following steps:

[0027] Step 1. Mix the weighed glass powder raw materials evenly; in this step, the glass powder raw materials are oxide powders, and the oxide powders include bismuth oxide, titanium oxide, zinc oxide, antimony oxide, containing or Does not contain tellurium oxide, contains or does not contain molybdenum oxide and selenium oxide powder, based on the total weight of the glass powder raw materials, the weight percentage of each component is: bismuth oxide: 30 wt%-70 wt%; Titanium: 1 wt%-20 wt%; Zinc oxide: 5 wt%-40 wt%; Antimony oxide: 5 wt%-30 wt%; Tellurium oxide: 0 wt%-30 wt%; Molybdenum oxide: 0 wt%- 10 wt%; selenium oxide: 0 wt%-15 wt%. Preferably, the weight percentage of each component is: Bismuth oxide: 30 wt%-60 wt%; Titanium oxide: 5 wt%-10 wt%; Zinc oxide: 5 wt%-30 wt%; Antimony oxide: 5 wt% wt%-20 wt%; molybdenum oxide: 1 wt%-8wt%, seleniu...

Embodiment 1

[0039] (1) Preparation of glass powder

[0040] Referring to Table 1-3, take by weighing 100g of glass powder raw materials, including: 50g bismuth oxide, 5g titanium oxide, 20g zinc oxide, 5g antimony oxide, 10g tellurium oxide, 5g molybdenum oxide, 5g selenium oxide, the above glass Mix the powder raw materials evenly, pour them into a crucible, put them into a sintering furnace, raise the temperature to 1250°C, keep them warm for 2 hours, then pour the melted glass frit into cold water for water quenching, then put them into a ball mill, and add 1g of sodium silicate and 2g of ethyl cellulose were ball milled for 24 hours, and dried to obtain glass powder A1 with a particle size of 2.5 microns;

[0041] (2) Preparation of conductive paste

[0042] Get the organic vehicle (containing 0.5-6wt% of ethyl cellulose, 30-75wt% of terpineol, 10-50wt% of dibutyl phthalate (DBP), butyl carboxylacetate, which accounts for 15wt% of the total amount of conductive paste must alcohol 0-...

Embodiment 2-5

[0044] Adopt the method identical with embodiment 1 to prepare glass powder and conductive paste, difference is raw material and its proportioning, and process parameter, see Table 1 and Table 2 for details, and Table 1 is the proportioning of glass powder raw material; Table 2 is Process parameters: Glass powder A2-A5 and conductive paste B1-B5 were obtained through Examples 2-5.

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Abstract

The invention provides glass powder, which comprises bismuth oxide 30wt%-70wt%, titanium oxide 1wt%-20wt%, zinc oxide 5wt%-40wt%, antimony oxide 5wt%-30wt% optional tellurium oxide 0wt%-30wt%, optional molybdenum oxide 0wt%-10wt% and selenium oxide 0wt%-15wt%. The invention also relates to a preparation method of the glass powder and conductive paste for solar cell prepared from the glass powder. The inventive glass powder contains no lead and boron, does no harm to the environment and can be used for preparing conductive paste for solar cell with high photoelectric conversion efficiency.

Description

technical field [0001] The invention relates to the field of conductive paste, more specifically, the invention relates to a boron-free and lead-free glass powder, a preparation method thereof, and a conductive paste made of the glass powder. Background technique [0002] With the depletion of traditional energy and the aggravation of environmental pollution, the development and application of new energy has become a hot spot in human research. Inexhaustible, green and pollution-free solar energy is one of the key points in the development and utilization of new energy. [0003] As a semiconductor device that converts solar energy into electrical energy, solar cells have become the focus of research and development for utilizing solar energy. Solar cells usually consist of a p-type silicon substrate, an n-type layer, an anti-reflection film (TiO 2 , SiO 2 or Si 3 N 4 ), positive electrodes and negative electrodes. Wherein, the front electrode and the negative electrode...

Claims

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Application Information

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IPC IPC(8): C03C12/00C03C14/00H01B1/22H01L31/0224
Inventor 舒剑李金儡周勇
Owner BYD CO LTD
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