Solar cell front face grid line and solar cell sheet printed with same

A technology of solar cells and front grid lines, which is applied to circuits, photovoltaic power generation, electrical components, etc., can solve the problems of reducing the utilization efficiency of solar cells, high production costs of solar cells, and increased use of conductive pastes. Effects of weight reduction, area reduction, and improved ability to collect electrons

Inactive Publication Date: 2013-02-13
山东力诺太阳能电力股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, solar cells adopt a structure of two main grids or three main grids, and the area covered by the main grid lines and auxiliary grid lines on the silicon wafer is relatively large, which makes the shading rate of the grid lines in the prior art reach more than 6%, reducing the The utilization efficiency of solar cells
In addition, precious metals are required as conductive paste when printing electrodes, and the large area covered by the main grid lines and sub-grid lines on the silicon wafer will inevitably increase the use of conductive paste. higher cost

Method used

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  • Solar cell front face grid line and solar cell sheet printed with same
  • Solar cell front face grid line and solar cell sheet printed with same
  • Solar cell front face grid line and solar cell sheet printed with same

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Embodiment 1

[0024] like figure 2 As shown, the front electrode of the solar cell includes four main grids 201, the width of the main grid is 1.2 μm, the distance between the main grid and the side is 24 mm, and the distance between the main grid is 35 mm. mm; it also includes 81 auxiliary grid lines 202 parallel to each other and perpendicular to the main grid, and the width of the auxiliary grid lines is 45 μm; it also includes two auxiliary grid lines 203 parallel to the main grid and connected to the endpoints of other auxiliary grid lines. 45μm, these two grid lines can increase the electrode circuit, prevent the circuit failure caused by the short grid of the auxiliary grid line, and increase the ability of the electrode to collect current.

[0025] The inventors of the invention have found that, using the electrode structure described in the present invention, the designed refractive index can be reduced from about 6% of the existing battery to 5.09%, which effectively increases th...

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Abstract

The invention relates to a solar cell front face grid line and a solar cell sheet printed with the front face grid line. The front face grid line of the solar cell sheet comprises a main grid and a secondary grid and is formed by four mutually-parallel main grids and a plurality of secondary grid lines which are mutually parallel and are vertical to the main grids; cell back face electrodes are located on a cell back face and correspond to the quantity and the position of front face main grids; and a main grid line and the back face electrodes are formed by solid or hollow or sectioned patterns. According to the solar cell sheet disclosed by the invention, the filling factor and the conversion efficiency of a solar cell can be improved, and silver slurry consumption in a production process is reduced.

Description

technical field [0001] The invention relates to a grid line of a solar battery and a battery sheet, in particular to a front grid line of a solar battery and a solar battery sheet printed with the front grid line. Background technique [0002] The rapid development of the solar energy industry needs to continuously reduce the cost of materials, improve the efficiency of photoelectric conversion to reduce the cost of power generation, and achieve the goal of being the same price as the mains electricity or lower than the price of the mains electricity. [0003] With the development of industrialization, conventional crystalline silicon cells have made great progress in improving conversion efficiency and reducing costs. The manufacturing process of crystalline silicon solar cells generally has the following steps: chemical cleaning and surface texture treatment, diffusion junction, edge etching and phosphorus silicon glass removal, anti-reflection film deposition, electrode p...

Claims

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Application Information

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IPC IPC(8): H01L31/0224H01L31/042
CPCY02E10/50
Inventor 徐振华李钢武明杨晓君李秉霖姜言森贾河顺程亮任现坤张春艳
Owner 山东力诺太阳能电力股份有限公司
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