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ITO powder, ITO painting for conductive film and manufacture method for transparent conductive film

A technology of conductive film and powder, which is applied in the field of ITO powder, can solve the problems of performance deterioration, resistance increase of transparent conductive film, and easy generation of voids in ITO micro-powder, so as to achieve the effect of increasing contact area and reducing resistance

Inactive Publication Date: 2014-08-20
MITSUBISHI MATERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the production method of the tin-containing indium oxide fine powder shown in the above-mentioned conventional patent document 1, there are rod-shaped ITO fine powders entangled in the dispersion liquid to form a jam (jam) state and there is The problem of easy generation of gaps between
Therefore, the resistance of the transparent conductive film made of the ITO conductive film produced by the above method increases, and there is a problem that, for example, the performance of optical devices such as thin-film solar cells containing the transparent conductive film is deteriorated.

Method used

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  • ITO powder, ITO painting for conductive film and manufacture method for transparent conductive film
  • ITO powder, ITO painting for conductive film and manufacture method for transparent conductive film
  • ITO powder, ITO painting for conductive film and manufacture method for transparent conductive film

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Experimental program
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Embodiment

[0052] Hereinafter, examples and comparative examples of the present invention will be described in detail.

[0053]

[0054] In order to make the first powder, first weigh an indium chloride aqueous solution (InCl 3 ) 100g and tin chloride (SnCl 4 ·5H 2 O) 6.3g was dissolved in 2000ml of pure water to prepare a mixed solution of indium chloride and tin chloride. The concentration of tin in this mixed solution was adjusted so that the molar ratio of Sn / In was 0.10. This mixed solution of indium chloride and tin chloride was heated to 60° C., and 29% by mass of ammonia water was gradually added over 160 minutes to prepare a tin-containing indium hydroxide suspension. Next, aqueous ammonia was added to the suspension, and ultrasonic waves of 34 kHz were applied to the suspension to prevent aggregation and produce aggregates of polycrystalline ITO particles while precipitation was being produced. The suspension containing tin-indium hydroxide was collected by filtration and...

Embodiment 2

[0064] Except for the average major axis diameter L of the first powder 1 Except for 200 nm, it carried out similarly to Example 1, and produced the transparent conductive film. This transparent conductive film was referred to as Example 2.

Embodiment 3

[0066] In addition to changing the ultrasonic irradiation of the suspension so that the average long-axis diameter L of the first powder 1 A transparent conductive film was produced in the same manner as in Example 1 except that the total reaction time was 3000 nm. This transparent conductive film was referred to as Example 3.

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Abstract

The invention provides ITO powder, ITO painting for conductive film and a manufacture method for transparent conductive film. When the painting containing the polycrystal ITO particles is used to manufacture the transparent conductive film constituted by the ITO conductive films and reduce the resistance of the conductive films. The ITO powder comprises first powder (11) and second powder. The first powder is constituted by the anisotropic polycrystal ITO particles; the cluster of the polycrystal ITO particles are formed by a plurality of rod-shaped bodies (11b) which are shorter than the central cores (11a) surrounding the rod-shaped cores along the length direction of the rod-shaped center cores. The second powder is constituted by the ITO particles which are finer than the first powder. The average long shaft axis of the firs powder and the average short axis diameter are L1 and S1, wherein the L1 is 200-5000nm and the LA / S1 is 2-20; the average long axis diameter of the second powder and the average short axis diameter are L2 and the S2, wherein the L2 is 10-100nm and the L2 / S2 1-3. The second powder is mixed in a mass ratio of 0.01-0.5 relative to total mass of the first powder and the second powder

Description

technical field [0001] The present invention relates to an ITO powder comprising a first powder composed of aggregates of polycrystalline ITO (Indium Tin Oxide) particles having shape anisotropy, and a second powder composed of ITO particles finer than the first powder . In more detail, it is related with the ITO powder used for the raw material of a transparent conductive film. Background technique [0002] In recent years, the use of an ITO conductive film as a transparent conductive film has become widespread. The ITO conductive film is generally formed by a physical film-forming method of sputtering ITO or a coating film-forming method of coating a dispersion liquid in which ITO particles are dispersed or an organic compound containing ITO. Among them, it is more advantageous to use the coating film-forming method than the physical film-forming method. This is because compared with the ITO conductive film formed by the physical film-forming method, although the conduc...

Claims

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Application Information

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IPC IPC(8): C03C17/23
Inventor 米泽岳洋山崎和彦竹之下爱
Owner MITSUBISHI MATERIALS CORP
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