A 3D printing method for making solar cell electrodes

A technology of solar cells and 3D printing, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as difficulty in improving ohmic contact, affecting cell fill factor and short-circuit current, etc., achieve low solid content, increase cross-sectional area, The effect of improving electrical conductivity

Inactive Publication Date: 2018-04-24
SHANGHAI SHENZHOU NEW ENERGY DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The silver paste used in screen printing is mainly composed of silver powder, glass powder and organic phase. It is difficult to improve the ohmic contact with the silicon wafer, which affects the improvement of the cell fill factor and short-circuit current.
In actual production, printing defects such as thick lines, broken grids, false prints, nodes, and slurry contamination caused by screen printing are an important factor affecting the yield of cells

Method used

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  • A 3D printing method for making solar cell electrodes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of 3D printing makes solar cell electrode, its structure is as follows figure 1 As shown, it includes a substrate 1 and a conductive ink line 2. The conductive ink line 2 is a high-resolution ink containing nano-sized particles, which is directly sprayed onto the substrate 1 through a 3D printer through a nozzle 3 to form an electrode grid line to form a solar cell electrode. . 3D printing passes the conductive ink through the small nozzle 3 at high speed according to the set program, and directly sprays it to a specific position on the surface of the substrate to form an electrode pattern. The substrate used can be a silicon wafer with a thickness less than 140 μm. Due to the use of 3D printing technology, the conductive The aspect ratio of the electrode grid lines formed by the ink lines is close to 1.0, and in this embodiment, the aspect ratio of the electrode grid lines is 0.8. The solid content of the conductive ink line used is 40-70wt%, and the solid cont...

Embodiment 2

[0027] A 3D printing method for making solar cell electrodes, including a substrate and conductive ink lines. The conductive ink lines are high-resolution inks containing nano-sized particles, which are directly sprayed onto the substrate through nozzles by a 3D printer to form electrode grid lines to form solar cells. For electrodes, due to the use of 3D printing technology, the substrate used can be a silicon wafer with a thickness of less than 140 μm, the aspect ratio of the electrode grid lines formed by the printed conductive ink lines is 0.3, and the solid content of the conductive ink lines used is 40wt%. . The components of the conductive ink used include Ag, glass powder, glycol ether and Ni / Cu mixed metal, and the weight ratio of the above raw materials is 35:5:40:0.1. Since the conductive ink contains conductive metals such as Ni and Cu, nickel The contact resistance with silicon is low, which can reduce the series resistance. The nanoparticle ablation anti-reflecti...

Embodiment 3

[0029] A 3D printing method for making solar cell electrodes, including a substrate and conductive ink lines. The conductive ink lines are high-resolution inks containing nano-sized particles, which are directly sprayed onto the substrate through nozzles by a 3D printer to form electrode grid lines to form solar cells. For electrodes, due to the use of 3D printing technology, the substrate used can be a silicon wafer with a thickness of less than 140 μm, the aspect ratio of the electrode grid lines formed by the printed conductive ink lines is 1.0, and the solid content of the conductive ink lines used is 70wt%. . The components of the conductive ink used include Ag, glass powder, glycol ether and Ni / Cu mixed metal, and the weight ratio of the above raw materials is 75:25:70:25. Since the conductive ink contains conductive metals such as Ni and Cu, nickel The contact resistance with silicon is low, which can reduce the series resistance. The nanoparticle ablation anti-reflecti...

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Abstract

The invention relates to a solar cell electrode manufactured by virtue of 3D printing. The solar cell electrode comprises a substrate and a conductive ink line; the conductive ink line is formed by use of a high-resolution ink containing nano-scale microparticles; the high-resolution ink is directly jetted on the substrate by use of a nozzle and via a 3D printer to form an electrode gate line, and therefore, the solar cell electrode is formed. Compared with the prior art, the solar cell electrode manufactured by virtue of 3D printing has the advantages that the series resistance and the contact resistance can be reduced, and the height-to-width ratio of the gate line is close to 1.0, and therefore, the cross sectional area of the electrode can be increased and the electrical conductivity can be improved.

Description

technical field [0001] The invention relates to a solar battery electrode grid wire, in particular to a 3D printing method for making solar battery electrodes. Background technique [0002] With the development of industry and the increasingly active human activities, human consumption of energy is increasing day by day, while the underground non-renewable mineral energy is becoming increasingly scarce, and the contradiction between energy supply and demand is increasingly intensified. Energy issues have become one of the key issues affecting human survival and development. one. Compared with many renewable energy sources such as wind power generation, ocean power generation, and biomass power generation, solar photovoltaic power generation is clean, safe, extensive, noise-free, pollution-free, energy is available everywhere, no need to consume fuel, and no mechanical rotation There are many incomparable advantages such as easy maintenance, unattended operation, short const...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0224
CPCH01L31/022425Y02E10/50
Inventor 尹振忠周利荣刘穆清马贤芳胡剑豪张忠卫
Owner SHANGHAI SHENZHOU NEW ENERGY DEV
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