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Composition for forming solar cell electrode and electrode prepared using same

A technology of solar cells and compositions, applied to conductive materials dispersed in non-conductive inorganic materials, circuits, photovoltaic power generation, etc., can solve the problems of reduced electrode cross-sectional area and increased series resistance, and achieve high solar cell performance. efficiency effect

Active Publication Date: 2021-05-11
CHANGZHOU JUHE NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the problem that the reduction of the electrode line width can lead to a reduction in the cross-sectional area of ​​the electrode, resulting in an increase in the series resistance.

Method used

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  • Composition for forming solar cell electrode and electrode prepared using same
  • Composition for forming solar cell electrode and electrode prepared using same
  • Composition for forming solar cell electrode and electrode prepared using same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0082] As a binder resin, 0.5% by weight of ethylcellulose (STD4, Dow Chemical Company) was fully dissolved in 2.9% by weight of Texenon (Eastman Chemical) at 60°C. In the binder solution, 90% by weight spherical silver powder (AG-5-11F, Dowa Hightech Co. ), consisting of bismuth oxide (15.8% by weight), tellurium oxide (53.8% by weight), zinc oxide (13.2% by weight) and lithium oxide (17.2% by weight), with an average particle size of 1.0 μm and a glass transition temperature of 273°C 5% by weight of Bi-Te-Zn-Li-O glass frit, 0.8% by weight of dispersant (ED-120, Kusumoto Chemical Co.), 0.4% by weight of viscosity stabilizer (Glide 410 (Glide 410), Tego (TEGO)) and 0.4% by weight of thixotropic agent (Thixatrol ST (Thixatrol ST, Hemings Co., Ltd.)), followed by mixing and mixing in a 3-roll kneader Kneaded to prepare a composition for solar cell electrodes.

example 2 to example 6 and comparative example 1 to comparative example 6

[0084] A solar cell electrode composition was prepared in the same manner as in Example 1, except that the amounts of the above components were changed as listed in Table 1 and Table 2.

[0085] Table 1 (unit: weight %)

[0086]

[0087] Table 2 (unit: weight %)

[0088]

[0089] Evaluation Example 1: Measuring Tanδ

[0090] Each of the solar cell electrode compositions prepared in Examples and Comparative Examples was placed on two parallel plates (diameter : 25mm). Then, the distance between the parallel plates was narrowed to 1.6 mm to compress the composition, then a part of the composition protruding outside the parallel plates was trimmed, and then the distance between the parallel plates was narrowed to 1.5 mm. Then, loss modulus A and storage modulus B were measured at a strain of 1% by increasing the frequency in logarithmic sweep mode from 0.1 Hz to 100 Hz. Substitute the measured A and B values ​​into Equation 1 to calculate Tan δ at a specific angular vel...

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Abstract

Disclosed herein is a solar cell electrode composition and an electrode prepared using the composition. The solar cell electrode composition comprises: conductive powder; glass frit; and an organic vehicle, wherein calculated according to Equation 1, the composition has a Tanδ greater than 3 and less than 10 at an angular velocity of 1 rad / s, and at 10 rad / s Tanδ greater than or equal to 4 and less than 12 at an angular velocity of s, and Tanδ greater than or equal to 2 and less than 10 at an angular velocity of 100rad / s: Tanδ=A / B (1) where A and B represent the loss modulus and Storage modulus, and were each measured by increasing the frequency in logarithmic sweep mode from 0.1 Hz to 100 Hz using a rheometer under the conditions of 1% strain and 23°C temperature.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2018-0078809 filed with the Korean Intellectual Property Office on July 6, 2018, the entire disclosure of which is incorporated herein by reference. technical field [0003] The present invention relates to a composition for solar cell electrodes and a solar cell electrode formed therefrom. Background technique [0004] A silicon-based solar cell is composed of a substrate formed of a p-type silicon semiconductor and an emitter layer formed of an n-type silicon semiconductor. A p-n junction is formed between the p-type substrate and the n-type emitter layer. When sunlight is incident on a solar cell with such a structure, through the photovoltaic effect, electrons are generated as majority carriers in the emitter layer formed by n-type silicon semiconductor, and electrons are generated in the emitter layer formed by p-type silicon semiconductor. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/22H01B1/16H01L31/0224
CPCH01B1/16H01B1/22H01L31/022425Y02E10/50Y02P70/50
Inventor 权大灿金周熙李性恩
Owner CHANGZHOU JUHE NEW MATERIAL CO LTD