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Solar cell with front point contact structure and novel front electrode

A technology of solar cells and front electrodes, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of affecting the effective light area of ​​solar cells, restricting the conversion efficiency of solar cells, restricting the manufacturing cost of solar cells, etc., and achieves small shading loss, Good internal reflection effect, the effect of saving manufacturing cost

Inactive Publication Date: 2014-05-21
陕西众森电能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The front electrode of a traditional crystalline silicon solar cell is composed of several main grids and several thin grids perpendicular to each other. The thin grids of the front electrode are quasi-rectangular structures, which affect the effective illumination area of ​​the solar cell on the one hand, and the metal-semiconductor contact area. Larger, which restricts the conversion efficiency of solar cells. On the other hand, the use of silver paste is relatively large, which restricts the manufacturing cost of solar cells.

Method used

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  • Solar cell with front point contact structure and novel front electrode
  • Solar cell with front point contact structure and novel front electrode
  • Solar cell with front point contact structure and novel front electrode

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Embodiment 1

[0017] A new solar cell front electrode 4 with a front point contact structure, which is formed by at least one main grid 3 and several thin grids perpendicular to each other, and each thin grid is composed of several point-shaped contact electrodes 1 and a transmission electrode 2 , wherein the preparation method of the contact electrode 1 is as follows: first, the metal conductive paste is printed on the surface of the solar cell according to a certain shape size and arrangement by a printing process, and then the metal conductive paste and the surface of the solar cell are formed into an alloy through a high-temperature sintering process , forming a good contact, thereby forming contact electrodes 1 , and the area of ​​each contact electrode 1 is between 0.0025 square millimeter and 0.03 square millimeter. In this embodiment, the metal conductive paste used is front conductive silver paste. The transmission wire 2 is a metal wire with a wire diameter of 20-100 microns. The ...

Embodiment 2

[0019] A new solar cell front electrode 4 with a front point contact structure, which is formed by at least one main grid 3 and several thin grids perpendicular to each other, and each thin grid is composed of several point-shaped contact electrodes 1 and a transmission electrode 2 , changing the size of the contact electrode 1, in order to ensure the ability of the front electrode 4 of the solar cell to collect sunlight, it is necessary to change the number of the contact electrode 1 accordingly, as image 3 As shown, reducing the volume of the contact electrodes requires increasing the number of contact electrodes.

Embodiment 3

[0021] A solar cell with a front point contact structure, including a p-type substrate 5, an n-type layer 6 is formed on the p-type substrate by diffusion, and a passivation anti-reflection layer 7 is deposited on the n-type layer 6, and the passivation anti-reflection layer 7 is deposited on the p-type substrate. On the reflective layer 7 is the new front electrode 4 of the solar cell with a front point contact structure as described in the first embodiment, and the bottom of the p-type substrate is the back electrode 8 .

[0022] Refer to Table 1 and Table 2 below. Table 1 is the parameters of traditional solar cells, and Table 2 is the detection parameters of a solar cell with a front point contact structure designed by the present invention. The open-circuit voltage of the solar cell is relatively increased by 0.5%, the short-circuit current is relatively increased by 1-1.5%, and the conversion efficiency of the solar cell is increased by more than 1.5%, as shown in Table 2...

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Abstract

The invention provides a solar cell with a front point contact structure and a novel front electrode and relates to the field of solar cell production, in particular to a solar cell with a novel structure and a novel solar cell front electrode. The novel front electrode of the solar cell with the front point contact structure is formed by at least one main grid and a plurality of thin grids which are perpendicular to each other, wherein each thin grid consists of a plurality of dot-shaped contact electrodes and one transmission electrode, the transmission electrode is a metal lead wire and penetrates the contact electrodes to be connected with the contact electrodes. One the one hand, the conversion efficiency of the solar cell can be improved, and on the other hand, the manufacture cost of the solar cell can be also saved.

Description

technical field [0001] The invention relates to the field of solar cell production, in particular to a solar cell with a new structure and a novel front electrode of the solar cell. Background technique [0002] The front electrode of a traditional crystalline silicon solar cell is composed of several main grids and several thin grids perpendicular to each other. The thin grids of the front electrode are quasi-rectangular structures, which affect the effective illumination area of ​​the solar cell on the one hand, and the metal-semiconductor contact area. Larger, which restricts the conversion efficiency of solar cells, on the other hand, the use of silver paste is relatively large, which restricts the manufacturing cost of solar cells. Contents of the invention [0003] The invention provides a solar cell with a front point contact structure and a novel front electrode. The fine grid structure of the novel front electrode is composed of several point-shaped contact electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/068
CPCH01L31/022433H01L31/068Y02E10/547
Inventor 张鹤仙韩涵
Owner 陕西众森电能科技有限公司