Solar cell device and solar cell module
A technology for solar cells and devices, applied in electrical components, semiconductor devices, circuits, etc., can solve problems such as the reduction of series connection characteristics of solar cells
Pending Publication Date: 2021-05-07
KANEKA CORP
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Problems solved by technology
However, if the anti-reflection layer is damaged or removed for some reason, it is expected that the series connection characteristics of the solar cells will be lowered.
[0007] For example, after overlapping a part of one end side of one solar battery cell under a part of the other end side of another solar battery cell, the p-type semiconductor layer on the back side of one end side of one solar battery cell and another solar cell When the n-type semiconductor layer on the back side of the other end side of the unit is connected in series, if the anti-reflection layer on the light-receiving surface side of one solar cell unit is damaged, the n-type substrate of one solar cell unit and the other solar cell An electrical path is generated between the n-type semiconductor layers on the back side of the other end side of the cell, and the series connection characteristics of the solar battery cells are degraded.
Method used
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[0020] Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. In addition, in each drawing, the same code|symbol is attached|subjected to the same or corresponding part. In addition, for the sake of convenience, hatching, component reference numerals, etc. may be omitted, and in this case, refer to other drawings.
[0021] (solar battery module)
[0022] figure 1 It is the figure which looked at the solar cell module provided with the solar cell device which concerns on this embodiment from the back side, figure 2 yes figure 1 II-II line sectional view of the solar cell module shown. exist figure 1 In the figure, the light-receiving side protection member 3 , the rear side protection member 4 , and the sealing member 5 described later are omitted, and the connecting member 6 described later is shown through. Such as figure 1 and figure 2 As shown, the solar cell module 100 includes a solar cell device (also...
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Abstract
Provided is a solar cell device which can suppress decreases in series connection characteristics without providing an insulating member when using a shingling method to overlap a part of back-contact type solar cells and serially connect the same. The solar cell device 1 comprises a plurality of solar cells 2. A part of one main surface side at one end side of one solar cell 2 among neighboring solar cells underlaps a part of the other main surface side at the other end side of the other solar cell 2, each solar cell 2 being a back-contact type solar cell comprising a first conductivity-type semiconductor layer 25 and second conductivity-type semiconductor layer 35 that are formed on the other main surface side of a first conductivity-type semiconductor substrate 11. A part or all of a trunk pattern part 35b of the second conductivity-type semiconductor layer 35 is positioned in an overlapping region Ro at the other end side of the solar cell 2, and a branch pattern part 25f of the first conductivity-type semiconductor layer 25 is not positioned in the overlapping region Ro.
Description
technical field [0001] The present invention relates to a solar cell device and a solar cell module including the solar cell device. Background technique [0002] Recently, when modularizing double-sided electrode type solar battery cells, there is a method of directly electrically and physically connecting them by overlapping a part of the solar battery cells without using conductive connecting wires. (connected in series). This connection method is called a shingling method, and a plurality of solar battery cells electrically connected by the shingling method is called a solar battery string (solar battery device) (for example, refer to Patent Document 1). [0003] In the solar battery string (solar battery device), more solar battery cells can be installed in the limited solar battery unit installation area of the solar battery module, so that the light-receiving area for photoelectric conversion increases, and the output of the solar battery module increases. . In a...
Claims
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IPC IPC(8): H01L31/0224H01L31/05H01L31/0747
CPCH01L31/0747H01L31/022441H01L31/0682H01L31/0516H01L31/0508H01L31/1804Y02P70/50Y02E10/547
Inventor 寺下彻中村淳一
Owner KANEKA CORP