Glass frit, composition for solar cell electrodes including the same, and electrode fabricated using the same

A solar cell and glass frit technology, applied to conductive materials dispersed in non-conductive inorganic materials, circuits, photovoltaic power generation, etc., can solve problems such as efficiency degradation

Inactive Publication Date: 2014-06-25
CHEIL IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this case, there may be a problem of efficiency degradation due to an increase in solar cell contact resistance

Method used

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  • Glass frit, composition for solar cell electrodes including the same, and electrode fabricated using the same
  • Glass frit, composition for solar cell electrodes including the same, and electrode fabricated using the same
  • Glass frit, composition for solar cell electrodes including the same, and electrode fabricated using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 5 and comparative example 1 to 2

[0053] Examples 1 to 5 and Comparative Examples 1 to 2: Preparation of compositions for solar cell electrodes

[0054] As shown in Table 2, 9 g of organic vehicle obtained by dissolving 1 g of ethyl cellulose in 8 g of butyl carbitol and 89 g of silver powder (Dowa5-11F, Dowa Hightech Co., Ltd.) were added to the 2 g of the prepared glass frits GF1 to GF7 were mixed and kneaded in a 3-roll kneader, thereby preparing a composition for a solar cell electrode.

[0055] Electrode Performance Evaluation

[0056] Each prepared composition was deposited on a screen print plate by rotating a scrapper on it. Each composition was printed on a mono-crystalline wafer with an average sheet resistance of 65Ω while extruding the paste composition onto the image area of ​​the screen printing plate. The printed wafers were dried at 300°C for 20-30 seconds and then subjected to firing in a BTU oven at a 6-zone temperature of 950°C and a belt speed of 250 rpm. After firing, measure the se...

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Abstract

The invention relates to a glass frit, a composition for solar cell electrodes including the same, and an electrode fabricated using the same. The glass frit includes at least three metal oxides selected from the group of lead oxide, silicon oxide, tellurium oxide, bismuth oxide, zinc oxide, and tungsten oxide, wherein the glass frit exhibits a phase transition peak in the range of about 300 DEG C. to about 600 DEG C. on a cooling curve obtained via an TG-DTA analysis while a mixture of the glass frit and silver powder, obtained by mixing the glass frit with the silver powder in a weight ratio of 1:1, is cooled at a cooling rate of 10 DEG C. / min, after heating the mixture to 850 DEG C. at a heating rate of 20 DEG C. / min and held there for a wait-time of 10 minutes.

Description

technical field [0001] The present invention relates to a glass frit, a composition for a solar cell electrode comprising the same, and an electrode produced using the same. Background technique [0002] A solar cell generates electric current using the photovoltaic effect of a p-n junction, which converts photons of sunlight into electric current. In a solar cell, front and rear electrodes are respectively formed on the upper and lower surfaces of a semiconductor wafer or substrate having a p-n junction. Then, the photovoltaic effect at the p-n junction is caused by sunlight entering the semiconductor chip, and electrons generated by the photovoltaic effect at the p-n junction supply current to the outside through the electrodes. The electrodes of the solar cell are formed on the wafer by applying, patterning and firing the electrode composition. [0003] Continuously reducing emitter thickness to improve solar cell efficiency can cause shunting, which can degrade solar c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/00
CPCC03C3/062C03C8/04C03C8/02C03C3/122H01L31/00H01L33/40C03C8/18C03C8/10C03C3/07H01L31/022425Y02E10/50H01B1/22H01L31/042H01L31/022466H01L31/022483
Inventor 崔永郁金银京金周熙朴永起宋大燮金载昊梁相贤
Owner CHEIL IND INC
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