Monocrystalline silicon solar cells

A technology of solar cells and monocrystalline silicon, which is applied in the field of solar cells, can solve problems affecting carrier collection efficiency, achieve the effects of shortening the actual transmission distance, shortening the transmission distance, and improving collection efficiency

Active Publication Date: 2016-08-31
CHANGZHOU SHICHUANG ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem brought about by this is that, from a microscopic point of view, in many cases, electrons are not transported to the grid through the optimal route, thus affecting the collection efficiency of carriers unconsciously

Method used

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  • Monocrystalline silicon solar cells
  • Monocrystalline silicon solar cells
  • Monocrystalline silicon solar cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 2 As shown, the bases 1 and 2 of the four sides of the bottom of the pyramid structure form an angle of about 45 degrees with the edge 3 of the silicon wafer; the electrode grid lines 4 are parallel to one set of bases 2 among the four sides of the bottom of the pyramid structure, and perpendicular to the other set of bases 1 . The electrode grid lines 4 are straight lines.

Embodiment 2

[0026] Such as image 3 As shown, one group of bases 1 in the four sides of the bottom of the pyramid structure is parallel to the edge 3 of the silicon wafer, and the other group of bases 2 is perpendicular to the edge 3 of the silicon wafer; the electrode grid line 4 is parallel to a group of bases 1 in the four sides of the bottom of the pyramid structure, It is perpendicular to the bottom edge 2 of another group, that is, the electrode grid line 4 is parallel to the edge 3 of the silicon wafer. The electrode grid lines 4 are straight lines.

[0027] Above embodiment does not represent that electrode grid line can only be straight line, in fact electrode grid line also can be arc or zigzag line among the present invention, as long as everywhere tangent line on electrode grid line and one side in the bottom surface four sides of certain pyramid structure The included angle is 0-10 degrees or 80-90 degrees.

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Abstract

The invention discloses a single crystalline silicon solar cell. The single crystalline silicon solar cell comprises a silicon chip and electrode grid lines, wherein the silicon chip is provided with a pyramid-structure texturing surface, and the included angle between the tangent line of each portion of the electrode grid lines and one of the four edges on the bottom surface of a certain pyramid structure ranges from 0 degree to 10 degrees or from 80 degrees to 90 degrees. According to the single crystalline silicon solar cell, the bottom edges of the pyramid structure of the texturing surface of the silicon chip can be effectively used for transmitting photoproduction electrons, the transmission distance of the photoproduction electrons on the surface of the silicon chip is shortened, collection efficiency of the electrons is effectively improved, and then cell conversion efficiency is improved; the density of the grid lines can be reduced under the condition that the cell conversion efficiency is not affected, and then the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a monocrystalline silicon solar cell with a specific positional relationship between an electrode grid line and a textured pyramid structure. Background technique [0002] Solar cells generate photo-generated carriers under light, in which photo-generated electrons are transported to the electrode grid through the surface of the cell and collected by the electrode grid. In addition, in order to enhance the absorption of sunlight by the silicon wafer, it is necessary to texture the surface of the silicon wafer. After texturing, a textured surface with a pyramid structure will be formed on the surface of the silicon wafer. In the process of photogenerated electrons traveling along the surface of the silicon wafer to the electrode grid lines, these pyramidal structures need to be crossed. Therefore, the relative position of the textured micro-pyramid structure of the silicon wa...

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 陈培良符黎明张丽娟
Owner CHANGZHOU SHICHUANG ENERGY CO LTD
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