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Conductive paste and solar battery cell using said conductive paste

A technology of solar cells and conductivity, applied to electrical components, conductive materials dispersed in non-conductive inorganic materials, semiconductor devices, etc., can solve the problem of conductive paste containing lead components, etc., and achieve high BSF and good adhesion sexual effect

Inactive Publication Date: 2013-09-11
CENT GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aforementioned Patent Document 1 and Patent Document 2 have the problem that the conductive paste contains lead components

Method used

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  • Conductive paste and solar battery cell using said conductive paste
  • Conductive paste and solar battery cell using said conductive paste
  • Conductive paste and solar battery cell using said conductive paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033]Hereinafter, it demonstrates based on an Example.

[0034] (conductive paste)

[0035] First, with regard to glass powder, various inorganic raw materials were weighed and mixed so as to have a specific composition described in the examples, to prepare a raw material masterbatch. Put this master batch of raw materials into a platinum crucible, heat and melt it in an electric heating furnace at 1000-1300°C for 1-2 hours, and obtain the compositions shown in Examples 1-5 in Table 1 and Comparative Examples 1-4 in Table 2 glass. A part of the glass is poured into the mold to form a block, which is used for the measurement of thermal physical properties (thermal expansion coefficient, softening point). The remaining glass is formed into flakes by a rapid cooling twin-roll forming machine, and granulated by a crushing device into a powder with an average particle size of 1-4 μm and a maximum particle size of less than 10 μm.

[0036] In addition, the said softening point w...

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PUM

PropertyMeasurementUnit
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Abstract

The objective of the invention is to obtain a non-lead-containing conductive paste which can be used as an electrode formed in a semiconductor silicon solar cell. A conductive paste for a solar cell which uses a semiconductor silicon substrate, the conductive paste characterized in that the composition of the glass frit contained in the conductive paste contains substantially no lead component, and comprises in mass%, 5-15 of SiO2, 20-40 of B2O3, 0-10 of Al2O3, 30-45 of ZnO, 5-30 of RO (total of at least one type selected from the group consisting of MgO, CaO, SrO and BaO), and 0.1-6 of R2O (total of at least one type selected from the group consisting of Li2O, Na2O and K2O).

Description

technical field [0001] The present invention relates to a lead-free conductive paste useful for forming electrodes of semiconductor silicon solar cells. Background technique [0002] As an electronic component using a semiconductor silicon substrate, known figure 1 The solar cell element shown. Such as figure 1 As shown, in a solar cell element, an n-type semiconductor silicon layer 2 is formed on the light-receiving surface side of a p-type semiconductor silicon substrate 1 with a thickness of about 200 μm, and a nitriding layer 2 is formed on the light-receiving surface side to improve light-receiving efficiency. An antireflection film 3 such as a silicon film, on which a surface electrode 4 connected to a semiconductor is further formed. [0003] In addition, an aluminum electrode layer 5 is similarly formed on the rear surface side of the p-type semiconductor silicon substrate 1 . The aluminum electrode layer 5 is generally formed by applying an aluminum paste made o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/16C03C8/04H01B1/22H01L31/04
CPCC03C8/04H01L31/022425H01L31/068Y02E10/547C03C3/089C03C8/16H01B1/22H01L31/04
Inventor 富永耕治滨田润
Owner CENT GLASS CO LTD
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