Composition for forming solar cell electrode, and electrode produced from composition

A solar cell and composition technology, which is applied to conductive materials, circuits, electrical components and other directions dispersed in non-conductive inorganic materials, can solve problems such as difficulty in printing patterns, and achieve the effect of high aspect ratio

Active Publication Date: 2015-09-09
上海匠聚新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is still difficult to print patte

Method used

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  • Composition for forming solar cell electrode, and electrode produced from composition
  • Composition for forming solar cell electrode, and electrode produced from composition
  • Composition for forming solar cell electrode, and electrode produced from composition

Examples

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detailed description

[0055] In the following exemplary embodiments, each component of the present invention will be described in more detail. However, the exemplary embodiments are provided to understand the present invention but are not limited to the following embodiments. Other details not described in this case can be easily inferred by those with ordinary knowledge in the relevant technical field, and are therefore omitted.

[0056] Composition for solar cell electrode

[0057] The composition for solar cell electrodes according to the present invention includes conductive powder (A), glass frit (B), organic vehicle (C) and thixotropic agent (D), and can be screen-printed in a fine line width manner. It is printed on the substrate and has high conversion efficiency.

[0058] Now, each component of the composition for solar cell electrodes according to the present invention will be described in more detail.

[0059] (A) Conductive powder

[0060] For the conductive powder, any o...

Example

[0108] Example 1 to Example 5 and Comparative Example 1 to Comparative Example 3

Example Embodiment

[0109] Example 1

[0110] For organic binders, 0.7wt% ethyl cellulose (STD4, SDT200, Dow Chemical Company) is fully dissolved in 3.3wt% Texanol at 60°C An organic vehicle was prepared, and 88wt% spherical silver powder (AG-4-8, Dowa Hightech Co. Ltd) with an average particle size of 2.0μm and 2.7wt% low melting crystal glass powder ( Pb-Bi-Te-O) (average particle size of 1.0μm and transition point of 280℃) and 0.6wt% of dispersant BYK145 (BYK-Chemie) and 0.4wt% of thixotropic agent Thixatrol ST (Hames Co., Ltd.) was added to the organic vehicle, followed by mixing and kneading in a 3-roll kneader to prepare a composition for solar cell electrodes.

[0111] The composition is printed in a predetermined pattern on the front surface of the wafer by screen printing. The properties of the composition were measured by the following methods, and the results are shown in Table 2.

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Abstract

The present invention relates to a composition for forming a solar cell electrode which is characterized by including a conductive powder, a glass frit, an organic vehicle, and a thixotropic agent, and satisfying 3<TI 10=(viscosity at 1 rpm)/(viscosity at 10 rpm)<5.5, 4<TI 20=(viscosity at 2 rpm)/(viscosity at 20 rpm)<7, 6<TI 50=(viscosity at 5 rpm)/(viscosity at 50 rpm)<7.5, 6<TI 100=(viscosity at 10 rpm)/(viscosity at 100 rpm)<7.5, 1<¦TI 10-TI 20¦<2, 0.5<¦TI 20-TI 50¦<1.5, and 0<=¦TI 50-TI 100¦<0.8. Here, thixotropic index (TI) is a value calculated by substituting viscosity measured at each revolution (rpm) with a spindle number 14 by using a rotation viscometer at 23°C. The composition for forming a solar cell electrode can realize a print pattern having a fine line width and high aspect ratio, and has excellent conversion efficiency.

Description

technical field [0001] The present invention relates to a composition for solar cell electrodes and an electrode manufactured using the composition. More particularly, the present invention relates to a solar cell electrode composition which can be printed on a substrate with fine line width and high aspect ratio by screen printing and has high conversion efficiency, and The present invention relates to electrodes manufactured using the composition. Background technique [0002] A solar cell generates electricity using a pn junction photovoltaic effect (photovoltaic effect) that converts photons of sunlight into electricity. In a solar cell, a front electrode and a back electrode are respectively formed on an upper surface and a lower surface of a semiconductor wafer or substrate having a pn junction. Then, the photovoltaic effect at the pn junction is induced by sunlight entering the semiconductor wafer, and electrons generated by the photovoltaic effect at the pn junctio...

Claims

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Application Information

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IPC IPC(8): H01B1/20H01B1/22H01L31/0224
CPCY02E10/50H01B1/22H01L31/022425H01B1/16H01L31/042H10K10/82H01L31/18
Inventor 宋大燮金载昊梁相贤崔永郁
Owner 上海匠聚新材料有限公司
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