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Conductive paste, solar cell prepared from conductive paste and manufacturing method

A solar cell and conductivity technology, which is applied in the field of conductive paste and solar cells prepared therefrom and manufacturing, can solve the problems of affecting the performance of solar cells, poor EL detection performance, poor tensile performance, etc., and achieves ohmic contact Excellent, high stability, excellent bonding strength

Active Publication Date: 2020-11-06
CHANGZHOU JUHE NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0023] Through this new detection project, solar cell researchers began to understand that in solar cells using lead-free tellurium-based glass electrode pastes, black spots or cloudy black spots often occur, affecting the performance of solar cells
Examples of EL detection photos are figure 1 as shown, figure 1 The test results of four solar cells are included, among which (1)-(3) all show that the EL detection performance is not good, (4) is a case where the EL detection performance is normal, but (4) has poor tensile performance and adhesive strength Low

Method used

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  • Conductive paste, solar cell prepared from conductive paste and manufacturing method
  • Conductive paste, solar cell prepared from conductive paste and manufacturing method
  • Conductive paste, solar cell prepared from conductive paste and manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1

[0093] 〔Prototype making〕

[0094] Making Tellurium Glass : Prepared TeO 2 、 Bi 2 o 3 、WO 3 , ZnO, Al 2 o 3 , LiO 2 , B 2 o 3 etc., according to the ratio shown in Table 1-1, Table 1-2, and Table 1-3, these glass raw materials were weighed and prepared, and finally small sample glasses A-1 to A-5 were made.

[0095] Table 1-1

[0096]

[0097] Table 1-2

[0098]

[0099] Table 1-3

[0100] A-5 TeO2 B2O3 weight% 93 7 Mol% 85.3 14.7

[0101] in,

[0102] A-4 is an embodiment of the tellurium-based glass defined by the present invention that does not substantially contain lead and uses lithium bismuth tellurium as an essential component. The rest is a comparative example, specifically,

[0103] A-1 is bismuth telluride tungsten glass (formulation in patent document 7);

[0104] A-2 is a glass in which bismuth telluride zinc is the main component and aluminum is added.

[0105] A-3 is a glass in which bismuth tellur...

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Abstract

The invention discloses a conductive paste for forming a surface electrode of a solar cell. The conductive paste comprises conductive powder, mixed glass and an organic phase, wherein the mixed glasscomprises the following two types of glass components: the first type of glass is at least one selected from tellurium-based glass which does not substantially contain lead and takes tellurium bismuthlithium as an essential component; the second type of glass is at least one kind of glass selected from lead silicate-based glasses that contain lead and silicon as essential components and that do not substantially contain tellurium. The invention also provides a solar cell prepared by printing the conductive paste into a surface electrode and a manufacturing method of the solar cell. A solar cell prepared from the conductive paste is good in EL performance detection, excellent in cell ohmic contact, high in cell efficiency, high in stability and strong in adhesive force, and the bonding performance is considered while the stability and the ohmic contact are improved.

Description

technical field [0001] The invention mainly relates to a paste composition suitable for manufacturing a solar cell electrode with no defect under EL detection and high stability, a solar cell using the paste and a manufacturing method thereof. Background technique [0002] A conventional solar cell is to set an electrically opposite conductive semiconductor layer on a conductive semiconductor substrate, and to set an anti-reflective film and a light-receiving surface electrode on the semiconductor layer, and to set a rear electrode structure on the back (hereinafter referred to as When the front and back are not distinguished, they are collectively referred to as "electrodes"). After receiving light, the electric energy generated by the pn junction of the semiconductor is extracted through the electrodes. Assuming that the above-mentioned semiconductor substrate is a p-type polycrystalline semiconductor silicon substrate, the semiconductor layer on the light-receiving side s...

Claims

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Application Information

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IPC IPC(8): H01B1/16H01B1/22H01L31/0224H01L31/18C03C3/12C03C3/07
CPCH01B1/16H01B1/22H01L31/022425H01L31/18C03C3/122C03C3/07Y02E10/50Y02P70/50
Inventor 冈本珍范刘海东任益超熊长军熊志凯蒋安松万莉牟亭亭
Owner CHANGZHOU JUHE NEW MATERIAL CO LTD
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