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Conductive paste and solar cell

A solar cell and electrical conductivity technology, applied in the field of solar cells and light-receiving surface electrodes, can solve the problem of no glass frit display, etc., and achieve the effects of improving bonding strength, superior environmental resistance, and superior reliability.

Inactive Publication Date: 2009-03-25
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in Patent Document 1, only the glass frit is described as described above, and no specific composition is shown for the glass frit.

Method used

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  • Conductive paste and solar cell
  • Conductive paste and solar cell
  • Conductive paste and solar cell

Examples

Experimental program
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Embodiment Construction

[0024] Hereinafter, the present invention will be clarified by describing specific embodiments of the present invention with reference to the drawings.

[0025] figure 1 is a partially broken front cross-sectional view showing a solar cell according to an embodiment of the present invention, figure 2 is a partially enlarged plan view schematically showing the electrode structure formed on the upper surface thereof.

[0026] The solar cell 1 has a semiconductor substrate 2 . The semiconductor substrate 2 has a structure in which an n-type Si-based semiconductor layer 2b is formed on an upper surface of a p-type Si-based semiconductor layer 2a. Such a semiconductor substrate 2 is obtained by diffusing impurities on one side of a p-type Si-based semiconductor substrate to form an n-type semiconductor layer 2b. However, the structure and manufacturing method of the semiconductor substrate 2 are not particularly limited as long as the n-type Si-based semiconductor layer 2b is f...

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Abstract

An electrically conductive paste which can be formed into an electrode by being fired at relatively low temperatures, which exhibits excellent adhesion strength between a light-receiving surface electrode and a semiconductor substrate, and which can satisfactorily reduce the contact resistance between the two, is provided. The electrically conductive paste used as a material for a light-receiving surface electrode of a solar cell, includes a Ag powder, an organic vehicle, and glass frit, wherein the softening point of the above-described glass frit is 570 DEG C. 760 DEG C., and the glass frit contains B2O3 and SiO2 in such a way that the ratio, B2O3 / SiO2, becomes 0.3 or less on a molar ratio basis and the first contains 0 to less than 20.0 percent by mole of Bi2O3.

Description

technical field [0001] The present invention relates to a conductive paste as a conductive material used in a light-receiving surface electrode of a solar cell, and more specifically, to a conductive paste containing Ag powder and a silicate glass frit and a conductive paste formed using the conductive paste. Solar cells with pasted light-receiving surface electrodes. Background technique [0002] Conventionally, a semiconductor substrate in which an n-type Si-based semiconductor layer is formed on an upper surface of a p-type Si-based semiconductor layer is used in a solar cell using a Si semiconductor. A light-receiving surface electrode is formed on one surface of the semiconductor substrate, and a rear surface electrode is formed on the other surface. [0003] Conventionally, the light-receiving surface electrode is formed by firing a conductive paste containing metal powder. As such a conductive paste, for example, Patent Document 1 below discloses a conductive paste ...

Claims

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Application Information

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IPC IPC(8): H01L31/04H01L21/288H01L31/0224
CPCY02E10/50
Inventor 川口义博
Owner MURATA MFG CO LTD
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