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Chalcopyrite solar cell and manufacturing method thereof

A solar cell and chalcopyrite-type technology, applied in the field of solar cells, can solve the problems of insufficient protection of stainless steel substrates, etc., and achieve the effects of light weight, improved adhesion, and improved adhesion

Inactive Publication Date: 2008-03-26
HONDA MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] In addition, in the technique of forming silicon oxide or iron fluoride layers (protective layers) on the upper and lower sides of the stainless steel substrate described in Patent Document 2, there are problems such as the following: In the vapor phase selenization process, due to H 2 The corrosiveness of Se gas cannot fully protect the stainless steel substrate, and the Mo electrode layer (back electrode film) will peel off from the corroded stainless steel substrate

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  • Chalcopyrite solar cell and manufacturing method thereof
  • Chalcopyrite solar cell and manufacturing method thereof
  • Chalcopyrite solar cell and manufacturing method thereof

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Embodiment Construction

[0041] Before describing the examples, the surface shape of the integrated mica substrate will be described. FIG. 4(A) and FIG. 4(B) show the measurement results of the surface shape of two arbitrary points of the integrated mica substrate. In FIG. 4 , the horizontal axis represents the lateral position of the integrated mica substrate, and the vertical axis represents the position in the height direction. As a feature of the integrated mica substrate, the maximum height difference changes very sharply (large aspect ratio). It can be seen from Fig. 4 that in the lateral direction, there is a maximum height difference of 5-6 μm in the range of tens of μm. The reason for this can be explained to be caused by the manufacturing method of the integrated mica, and since the pulverized mica is mixed in the resin, the pulverized mica flakes exist on the surface, and the aspect ratio becomes extremely large. The surface roughness of the integrated mica substrate is Ra=1.6 μm and Ra=0...

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Abstract

To realize a solar cell having a high conversion efficiency and an excellent flexibility. [MEANS FOR SOLVING PROBLEMS] A substrate (1) may be a mica substrate or a laminated mica substrate. Since the mica or the laminated mica has a high insulation ability and heat resistant temperature, it can be selenized at an appropriate processing temperature in a gas phase selenization and it is possible to obtain a high conversion efficiency. Moreover, since the mica or the laminated mica has an excellent flexibility, the substrate may be produced in a mass production. On the other hand, the mica or the laminated mica has a surface having a large surface roughness. If a chalcopyrite-based light absorption layer (6) is formed as it is, leak is caused and it is impossible to obtain a high convergence efficiency. To cope with this, an intermediate layer (2) formed by a ceramic-based material and a binder layer (4) are arranged between the mica substrate (1) and a molybdenum electrode (5). By providing the intermediate layer (2) and the binder layer (4), it is possible to increase the surface coating performance and realize a solar cell having a high conversion efficiency.

Description

technical field [0001] The invention relates to a solar cell with a light-absorbing layer of a chalcopyrite compound, in particular to a solar cell with high flexibility, suitable for mass production and high conversion efficiency and a manufacturing method thereof. Background technique [0002] Solar cells that receive light and convert it into electricity are classified into bulk and thin-film types depending on the thickness of the semiconductor. Among them, thin-film solar cells are solar cells in which the semiconductor layer has a thickness of several tens of μm to several μm or less, and are classified into Si thin-films and compound thin-films. Thin-film compound solar cells have II-VI group compounds, chalcopyrites, and the like, and some of them have been commercialized so far. Among them, chalcopyrite-based solar cells are called CIGS (Cu(InGa)Se)-based thin-film solar cells, CIGS solar cells, or I-III-VI-based solar cells according to the aliases of the material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/04
CPCH01L31/0322H01L31/0749H01L31/022425Y02E10/541Y02P70/50
Inventor 米泽谕林田匡史
Owner HONDA MOTOR CO LTD
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