Solar cell module

A technology of solar cells and components, applied in electrical components, circuits, photovoltaic power generation, etc., can solve the problem of water vapor output performance degradation and other issues

Active Publication Date: 2005-08-10
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the three-layer structure solar cell module not containing Al foil has a problem of water resistance, that is, the output performance against water vapor is lowered.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0122] Solar cell element 1 with figure 1 , 3 Same as shown in 4. That is, as described above, the substantially intrinsic i-type amorphous silicon layer 3 and the p-type amorphous silicon layer 4 are continuously formed on the n-type monocrystalline silicon substrate 2 .

[0123] Furthermore, an ITO film 5 is formed on the p-type amorphous silicon layer 4 . A collector electrode (slurry electrode) 6 is formed in a predetermined region on the upper surface of the ITO film 5 . The collector electrode 6 includes a conductive filler made of silver (Ag) and a thermosetting resin. The thermosetting resin in collector electrode 6 contains epoxy resin in a volume ratio of 70% to 100%. If the proportion of epoxy resin in the resin binder is less than 100%, the other resin components in the resin binder are all polyurethane resins.

[0124] An i-type amorphous silicon layer 7 and an n-type amorphous silicon layer 8 are sequentially formed on the lower surface of the n-type monocr...

Embodiment 1-2

[0164] In Example 1-2, a resin material containing 70 vol % bisphenol-A epoxy resin and 30 vol % polyurethane resin was used for the conductive paste (silver paste) to form the collector electrodes 6 and 10 . Except for this, the solar cell module of Example 1-2 was prepared as in Example 1-1.

Embodiment 1-3

[0166] In Examples 1-3, a resin material containing 90 vol % bisphenol-A epoxy resin and 10 vol % polyurethane resin was used for the conductive paste (silver paste) to form the collector electrodes 6 and 10 . Except for this, the solar cell module of Example 1-3 was prepared as in Example 1-1.

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Abstract

A solar cell module of the present invention was made to improve adhesion between electrodes, which is formed with thermosetting resin containing silver paste, of a solar cell element and connecting tabs coated with lead (Pb) free spider. To achieve this purpose, the solar cell module is comprised of a front surface member, a rear surface protective member, a plurality of solar cell elements provided between the front surface member and the rear surface protective member, and connecting tabs for electrically connecting the solar cell elements to each other through electrodes with the use of lead free solder. The electrodes of the solar cell elements are made of silver paste containing thermosetting resin and silver powder. The thermosetting resin contains epoxy resin at volume ratio of 70% or more having a glass transition rate of 80 DEG C to 200 DEG C measured by a TMA method. The connecting tabs coated with lead free solder are soldered to the electrodes.

Description

technical field [0001] The present invention relates to solar cell modules, and more particularly to techniques for increasing the yield of solar cells. Background technique [0002] Solar cells are considered to be new energy sources that can directly convert sunlight, a clean and inexhaustible energy source, into electrical energy. [0003] Because the output of a single solar cell is as small as a few watts, multiple solar cells are often connected in series or in parallel to increase the output to several hundred watts and used as a solar cell module to power homes and buildings. [0004] Figure 19 is a cross-sectional view partially showing the structure of a conventional solar cell module. Such as Figure 19 As shown in , a plurality of solar cell elements 100 are connected with joints 102 made of conductive material such as copper foil. In the light-transmitting front surface member 124 such as glass and light-transmitting plastic and the rear surface protection me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224
CPCH01L31/0504H01L31/0747H01L31/022425Y02E10/50H01L31/048
Inventor 吉岭幸弘二宫国基
Owner SANYO ELECTRIC CO LTD
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