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Method for manufacturing translucent monocrystalline silicon solar battery

A technology of solar cells and manufacturing methods, applied in the direction of final product manufacturing, sustainable manufacturing/processing, circuits, etc., can solve problems such as unsightly shape and monotonous cell arrangement.

Active Publication Date: 2009-05-27
WUJIANG GOLDEN GLASS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing solar cells are opaque, and the photovoltaic-building integrated components used as architectural glass need a certain light transmittance. , in this way, the layout of cells is monotonous and the shape is also unsightly, so photovoltaic-building integrated components are often rejected by architectural designers and users

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Choose resistivity 0.5~2Ω·cm, dislocation density3 at / cm 2 , oxygen content≤1.0×10 18 at / cm 3 , carbon content≤5×10 17 at / cm 3 , single crystal silicon rod with minority carrier lifetime>10μs and crystal direction deviation ≤±3°, cut off the head and tail of the single crystal silicon rod with an external circular cutting machine, and cut the single crystal silicon rod into a cross section of 125.5×125.5mm , and then segmented into silicon columns with a slice length of 30-40mm.

[0017] Under the protection of argon, a laser cutting machine was used to cut light-transmitting holes in the axial direction of the silicon column. The size of the light-transmitting holes was 4.6×4.6mm, and the arrangement was in an array of 8×8 equal intervals, leaving a 5mm wide edge. The laser pulse energy of the laser cutting machine is 700MJ, the pulse width is 12ns, the pulse frequency is 75Hz, and the peak power density of the laser beam focus is 6×10 9 W / cm 2 . The cutting spe...

Embodiment 2

[0027] Choose resistivity 0.5~2Ω·cm, dislocation density3 at / cm 2 , oxygen content≤1.0×10 18 at / cm 3 , carbon content≤5×10 17 at / cm 3 , single crystal silicon rod with minority carrier lifetime>10μs and crystal direction deviation ≤±3°, cut off the head and tail of the single crystal silicon rod with an external circular cutting machine, and cut the single crystal silicon rod into a cross section of 156.5×156.5mm mm, and then segmented into silicon columns with a slice length of 120-160mm.

[0028] Under the protection of argon, use a high-pressure water jet driven by a booster pump to cut light-transmitting holes in the axial direction of the silicon column. The size of the light-transmitting holes is 6.4×6.4mm, and the arrangement is 9×9 equally spaced arrays, leaving a width of 5mm. the edge. The water pressure of the high-pressure water jet is 350MPa, with alumina as the sand material, and the high-pressure water is demineralized water.

[0029] Carry out rounding tr...

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Abstract

The invention discloses a method for producing transmittance monocrystal silicon solar batteries used in building integrated photovoltaic. The method comprises: dividing a monocrystal silicon rod into fragments; cutting a transmittance hole, and corroding the wall of the transmittance hole; obtaining a heterojunction by diffusion; removing a diffusion layer around a wafer and the transmittance hole; removing phosphorosilicate glass; producing a reflection deducting coating; producing electrodes; and obtaining monocrystal silicon solar batteries with the transmittance hole. The monocrystal silicon solar batteries can produce two-glass photovoltaic-building components, can be connected but no transmittance gap, can realize transmittance through the transmittance hole, can make two-glass photovoltaic-building components look more beautiful and can be applied commercially on a large scale in the field of building integrated photovoltaic.

Description

technical field [0001] The invention relates to a method for manufacturing a solar cell, in particular to a method for manufacturing a light-transmitting monocrystalline silicon solar cell for photovoltaic-building integration. Background technique [0002] It is an indisputable and reasonable way to use solar energy to solve energy problems in the process of human development. Attaching solar cells to architectural glass and combining building and photovoltaic power generation (BIPV) has become a hot spot in current solar energy applications. The existing production process of monocrystalline silicon solar cells generally includes: cutting silicon rods into wafers, grinding and texturizing the wafer surface; diffusion junction, edge junction etching, etching to remove phosphosilicate glass, antireflection film production, and then manufacturing electrode. However, the existing solar cells are opaque, and the photovoltaic-building integrated components used as architectural...

Claims

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Application Information

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IPC IPC(8): H01L31/18
CPCY02P70/50
Inventor 庄大建郑鸿生林汉德张乐军肖坚伟沈忠灿洪晓东邱速希蔡岳涛郑新玲
Owner WUJIANG GOLDEN GLASS TECH
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