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Laminated body for thin-film solar cell, thin-film solar cell, and manufacturing method thereof

A technology for solar cells and manufacturing methods, applied in the directions of final product manufacturing, sustainable manufacturing/processing, circuits, etc., can solve the problems of non-adhesive transparent conductive films, damage to photoelectric conversion layers, etc., to simplify and improve the manufacturing process. The effect of conversion efficiency

Active Publication Date: 2017-06-30
MITSUBISHI MATERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the transparent conductive film formed by the above-mentioned conventional wet coating method has no adhesiveness
Therefore, in order to form a conductive reflective film, a heat treatment step of applying a composition for a conductive reflective film on a transparent conductive film and then firing it occurs, and the photoelectric conversion layer may be damaged in this heat treatment step.

Method used

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  • Laminated body for thin-film solar cell, thin-film solar cell, and manufacturing method thereof
  • Laminated body for thin-film solar cell, thin-film solar cell, and manufacturing method thereof
  • Laminated body for thin-film solar cell, thin-film solar cell, and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] A method for forming a transparent electrode layer, a metal foil, or a metal film formed on a substrate, and a reinforcing film will be described. A composition for a transparent electrode layer for forming a transparent electrode layer was prepared as follows. 70 parts by mass of gallium-doped zinc oxide (GZO) powder having an atomic ratio of Ga / (Ga+Zn) = 0.02 as transparent conductive oxide particles and isopropanol as a dispersion medium were mixed to make the whole 100 parts by mass share. Using zirconia beads with a diameter of 0.3 mm for this mixture, a Dyno mill (horizontal bead mill) was operated for 2 hours to disperse the GZO powder in the mixture. Polystyrene as a binder was mixed in this dispersion liquid so that the mass ratio of GZO powder:polystyrene=7:3. And the dispersion liquid was diluted with ethanol so that the GZO powder might become 2 mass parts with respect to 100 mass parts of compositions for transparent electrode layers, and the composition ...

Embodiment 2～14

[0079] Except for the conditions shown in Table 1, the test was carried out in the same manner as in Example 1. Among them, SB-10A manufactured by Mitsubishi Materials Corporation was used as the silica sol gel containing the hydrolyzate of silicon alkoxide used in Example 5 and the like. In addition, in the wet coating method used in Example 7 and the like, Ag nano-ink in which Ag colloid with an average particle diameter of 0.03 μm is dispersed in an ethanol solvent is used. The combination of Ag nano-ink used is 10 parts by mass of Ag colloid and 90 parts by mass of ethanol. In addition, the ratio of the transparent conductive oxide particles in Table 1 (the unit of transparent conductive oxide particles in the solid content is % by mass) represents {(mass of transparent conductive oxide particles) / [(transparent conductive oxide particles mass)+(mass of adhesive)]×100}. In addition, the adhesive layers of Examples 6, 11, and 13 were produced by drying, and the adhesive la...

Embodiment 15

[0081] A method for forming a transparent electrode layer, a metal foil, or a metal film formed on a substrate, and a reinforcing film will be described. By molecular beam epitaxy (MBE) using an indium tin oxide (ITO) target with an atomic ratio of Sn / (Sn+In) = 0.05, it is formed as a transparent electrode film on the photoelectric conversion layer of the film-formed solar cell. Membrane ITO thin film. The polyamide is applied to the formed transparent electrode film by a die coating device and dried to form an adhesive layer. On the other hand, a titanium thin film as a metal film is formed by a sputtering method on a PET film (stretched film, heat resistance: 200°C) with a thickness of 100 μm used as a base material, and the titanium thin film is patterned by laser scribing form. After the titanium thin film formed on the PET film was pasted on the adhesive layer, heat treatment was performed at 180° C. for 5 minutes, whereby the titanium thin film formed on the PET film w...

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Abstract

PROBLEM TO BE SOLVED: To laminate a metal foil or a metal film formed on a base material as a conductive reflection film, in order to make manufacturing processes of a rear surface electrode of a thin film solar cell simple and efficient, and further improve the conversion efficiency of a thin film solar cell by omitting a thermal treatment process during manufacturing processes of the conductive reflection film.SOLUTION: A laminate 3 for a thin film solar cell includes a substrate 30, a transparent conductive layer 31, a photoelectric conversion layer 32 and a transparent electrode layer 33, in the order. The transparent electrode layer 33 contains a transparent conductive oxide particle comprising an indium tin oxide particle, an antimony doped tin oxide particle or the like, and a light transmitting binder comprising a silicon alkoxide hydrolysate, polystyrene, an acrylic resin or the like, and can laminate a metal foil or a metal film formed on a base material.

Description

technical field [0001] The present invention relates to a thin-film solar cell laminate and a method for producing a thin-film solar cell using the thin-film solar cell laminate. Background technique [0002] At present, from the standpoint of environmental protection, the research, development and practical application of green energy are being carried out. The energy source of solar cells, that is, sunlight, is infinite and pollution-free, so it is attracting attention. Conventionally, monocrystalline silicon or polycrystalline silicon bulk solar cells have been used as solar cells. However, bulk solar cells are expensive to manufacture and have low productivity. Therefore, development of solar cells that save as much silicon as possible has been urgently pursued. [0003] Therefore, the development of a thin-film solar cell using a semiconductor such as amorphous silicon having a thickness of, for example, 0.3 to 2 μm has been actively pursued. This thin-film solar cell ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/054H01L31/0224H01L31/075H01L31/20
CPCH01L31/022475H01L31/022483H01L31/022491H01L31/1884Y02E10/52Y02E10/548Y02P70/50
Inventor 米泽岳洋马渡芙弓山崎和彦
Owner MITSUBISHI MATERIALS CORP