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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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in Patent Document 1, only the glass frit is described as des

Method used

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

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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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