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Thin-film solar cell and method for manufacturing the same

A solar cell and manufacturing method technology, which is applied to manufacturing tools, circuits, photovoltaic power generation, etc., can solve the problem that the photoelectric conversion layer and metal electrode processing methods are difficult to use thick-film cells, and achieve the effects of inhibiting crystallization and inhibiting leakage current.

Inactive Publication Date: 2012-07-25
FUJI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In addition, the processing method of blowing off the photoelectric conversion layer and the metal electrode at the same time is difficult to be used in thick-film cells on the order of several microns like microcrystalline silicon tandem cells.

Method used

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  • Thin-film solar cell and method for manufacturing the same
  • Thin-film solar cell and method for manufacturing the same
  • Thin-film solar cell and method for manufacturing the same

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no. 1 approach

[0078] figure 1 is a schematic cross-sectional view showing the cell structure of the thin-film solar cell according to the first embodiment of the present invention. In the thin-film solar cell of the first embodiment, at least a metal electrode, a photoelectric conversion layer, and a transparent electrode are sequentially formed on an insulating film substrate, and a manufacturing method thereof will be described.

[0079] Specifically, the substrate-type solar cell of the first embodiment of the present invention is such as figure 1 As shown, a metal electrode 3 , a photoelectric conversion layer 6 and a transparent electrode 7 are formed on one side sandwiching a film substrate 1 , and a first back electrode 4 and a second back electrode 8 are formed on the other side. In addition, the film-forming layers on the battery surface and the back surface are separated into rectangles by the battery surface-side processing line 9 and the rear-side processing line 10 , respect...

no. 2 approach

[0129] The second embodiment of the present invention relates to a method of manufacturing a solar cell having a substrate structure in which serial connection is performed without using holes such as serial connection holes 2 and collector holes 5 . Figure 6 Showing the structure of the thin-film solar cell according to the second embodiment of the present invention, (a) is a cross-sectional view of the state before the metal electrode is processed, (b) is a cross-sectional view of the state after the metal electrode is processed, and the transparent electrode 7 is before and after processing schematic diagram.

[0130] exist Figure 6 In the state shown in (a), the metal electrode 3 and the photoelectric conversion layer 6 are separately deposited on the film substrate 1 and formed by laser patterning. Furthermore, a transparent electrode 7 is formed on top of these layers.

[0131] Here, the photoelectric conversion layer 6 of this embodiment has a tandem structure of an...

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Abstract

Provided is a thin-film solar cell which is obtained by irradiating a laser from a transparent electrode side so that the lower layer of a photoelectric conversion layer selectively absorbs light and by performing blow-off processing, and also provided is a method for manufacturing the thin-film solar cell. The thin-film solar cell manufactured by said method is a substrate-type solar cell that has a photoelectric conversion layer (6) in which two or more n, i, and p junctions having non-monocrystalline silicon as the main material thereof are combined in the thickness direction, and the thin-film solar cell is formed by sequentially laminating a metal electrode (3), the photoelectric conversion layer (6), and a transparent electrode (7) on a substrate (1), wherein the thin-film solar cell has a top cell (6b) which is the photoelectric conversion layer (6) on the transparent electrode (7) side and also has a cell (6a) which has at least one layer more on the metal electrode (3) side than the top cell (6b), and the method for manufacturing the thin-film solar cell includes a step for simultaneously removing at least two photoelectric conversion layers (6) (6a, 6b); and the transparent electrode (7) by using a laser that has a wavelength having selective sensitivity to the cell (6a) other than the top cell (6b) from the transparent electrode (7) side.

Description

technical field [0001] The present invention relates to a method for manufacturing a thin-film silicon solar cell with a substrate structure, and also relates to a thin-film solar cell formed by the manufacturing method. Background technique [0002] Thin-film solar cells, which are typical examples of solar cells (photoelectric conversion devices) in which a plurality of photoelectric conversion elements are connected in series on the same substrate, are thin, lightweight, low in manufacturing cost, and easy to increase in area. Solar cells are considered to be the mainstream in the future, and in addition to being used for power supply, the demand for business use and general residential use, which is installed on the roof or windows of buildings, is also gradually expanding. [0003] The above-mentioned thin-film solar cells, that is, thin-film silicon solar cells with amorphous silicon (a-Si) or amorphous silicon germanium (a-SiGe) or microcrystalline silicon as the main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/04
CPCB23K26/367B23K26/409H01L27/1425H01L27/1426B23K26/0063Y02E10/50B23K26/4075B23K26/40B23K26/364B23K26/57B23K2103/172B23K2103/50H01L31/0463H01L31/0465Y02E10/548
Inventor 藤挂伸二
Owner FUJI ELECTRIC CO LTD