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Conductive film forming composition, solar cell composite film and forming method thereof

A technology of solar cells and components, applied in conductors, circuits, photovoltaic power generation, etc., can solve the problems that hinder the improvement of conversion efficiency and the increase of solar cell series resistance, and achieve the effects of improvement of conversion efficiency, decrease of series resistance and decrease of contact resistance

Inactive Publication Date: 2011-09-28
MITSUBISHI MATERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, if the difference between the work function of the surface of the photoelectric conversion layer 13 and the work function of the surface of the transparent conductive film 14a becomes large, the contact resistance between the photoelectric conversion layer 13 and the transparent conductive film 14a during power generation increases, which makes the contact resistance between the photoelectric conversion layer 13 and the transparent conductive film 14a during power generation increase. Increased series resistance in solar cells hinders improvement in conversion efficiency

Method used

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  • Conductive film forming composition, solar cell composite film and forming method thereof
  • Conductive film forming composition, solar cell composite film and forming method thereof
  • Conductive film forming composition, solar cell composite film and forming method thereof

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preparation example Construction

[0063] In the preparation of the binder dispersion liquid, it is preferable to use the same type of dispersion medium as the dispersion medium used in the preparation of the above-mentioned conductive oxide fine particle dispersion liquid. In order to form a homogeneous film, the content of the dispersion medium is preferably within a range of 50 to 99.99% by mass.

[0064] Also, depending on the components used, it is preferable to add a resistance-lowering agent, a water-soluble cellulose derivative, or the like. Examples of the resistive reducing agent include the same kind of resistive reducing agents used in the first method described above. The content ratio of these low resistivity agents is preferably 0.1 to 10% by mass. Moreover, the transparency in the transparent conductive film formed also improves by adding a water-soluble cellulose derivative. Examples of the water-soluble cellulose derivatives include the same derivatives as those used in the above-mentioned f...

Embodiment 1～21

[0104]

[0105] As the compositions shown in Table 1 and Table 2 below, conductive oxide fine particles with an average particle diameter of 0.025 μm, a dispersion medium, a binder, a coupling agent, and The total amount of the other components of the ingredients is set to 60g, this is put into a 100cc glass bottle, and 100g of zirconia balls (MICROHYCA, manufactured by Showa Shell Oil Co., Ltd.) with a diameter of 0.3mm are used to disperse them with a paint shaker for 6 hours. , thereby obtaining a composition for forming a transparent conductive film. In addition, in Table 1 or Table 2, the first mixed liquid is a dispersion medium in which isopropanol, ethanol, and N,N-dimethylformamide are mixed in a mass ratio of 4:2:1. In addition, the second mixed solution is a dispersion medium in which ethanol and butanol are mixed at a mass ratio of 98:2.

[0106] Next, a composition for a conductive reflective film was prepared in the following procedure. First, an aqueous meta...

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Abstract

The invention provides a solar cell composite film, a forming method therefor and a transparent conductive film forming composition, wherein the conversion efficiency of the solar cell is improved by reducing the contact resistance between a photoelectric conversion layer and the transparent conductive film and the serial resistance of the solar cell during the generation process. The invention is characterized in that conductive oxide particles are Sn or Zn doped indium oxide with In, Sn or Zn as constituent elements, or In, Sn, Al, Ga or Ge doped zinc oxide with In, Sn, Al, Ga or Ge as constituent elements, or In, Ga, Al or Sb-doped tin oxide with In, Ga, Al or Sb as constituent elements. The conductive oxide particles further comprise additive elements different from the constituent elements. The proportion of the additive elements is 0.01-20 mole %.

Description

technical field [0001] The present invention relates to a method for forming a composite film for a solar cell composed of a transparent conductive film and a conductive reflective film provided on a photoelectric conversion layer of a solar cell, a composite film formed by the method, and a method for forming the transparent conductive film composition for forming a transparent conductive film. More specifically, it relates to a method for improving conversion efficiency by reducing contact resistance between a photoelectric conversion layer and a transparent conductive film and between a transparent conductive film and a conductive reflective film, and reducing series resistance in a solar cell during power generation. A method for forming a composite film for a solar cell, a composite film formed by the method, and a composition for forming a transparent conductive film for forming the transparent conductive film. Background technique [0002] Currently, from the standpo...

Claims

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Application Information

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IPC IPC(8): H01B1/08H01L31/18H01L31/0224H01L31/04
CPCY02E10/52Y02E10/50Y02P70/50H01B1/02H01B1/08H01B5/16H01L31/022425H01L31/042
Inventor 山崎和彦米泽岳洋林年治白石真也
Owner MITSUBISHI MATERIALS CORP
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