Lamination-recombination passive film used for front surface of single-crystalline-silicon solar cell

A solar cell and front surface technology, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of unsatisfactory passivation effect, poor optical matching performance of anti-reflection film and packaging materials, etc., and achieve good optical matching Effect

Inactive Publication Date: 2012-07-25
DONGFANG ELECTRIC YIXING MAGI SOLAR POWER TECH
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  • Abstract
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Problems solved by technology

[0006] The object of the present invention is to propose a passivation effect excellent, optical Laminated composite passivation film for the front surface of monocrystalline silicon solar cells with good matching

Method used

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  • Lamination-recombination passive film used for front surface of single-crystalline-silicon solar cell
  • Lamination-recombination passive film used for front surface of single-crystalline-silicon solar cell

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Such as figure 1 As shown, a laminated composite passivation film for the front surface of a monocrystalline silicon solar cell, on the front surface of the monocrystalline silicon substrate 5 of the solar cell, a silicon oxide film 4 and a hydrogenated amorphous silicon film 3 are sequentially arranged from the inside to the outside And a silicon nitride film 2; a printed electrode 1 is arranged on the silicon nitride film 2.

[0022] The silicon oxide film 4 of the present invention is a silicon dioxide layer with a thickness of 40-50 nm; the hydrogenated amorphous silicon film 3 has a thickness of 15-20 nm; and the silicon nitride film 2 has a thickness of 60-70 nm.

[0023] The silicon oxide film of the present invention makes the surface state density of the cell sheet the same order of magnitude as the atomic density of silicon, the hydrog...

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Abstract

The invention discloses a lamination-recombination passivation layer used for the front surface of a monocrystalline silicon solar cell. A silicon oxide thin film (4), a hydrogenated amorphous silicon thin film (3) and a silicon nitride thin film (2) are arranged on the front surface of a solar cell monocrystalline silicon substrate (5) from the inside to the outside in sequence. According to the lamination-recombination passive film, the surface state density of the cell is in the same order of magnitudes with the atomic density of silicon, the overhanging units on the surface of the cell are filled effectively by the hydrogenated amorphous silicon thin film, the silicon nitride thin film plays the role of passivation and antireflection simultaneously, and the whole passivation layer has good optical matching property with EVA (ethylene vinyl acetate) and glass for packaging.

Description

technical field [0001] The invention relates to a monocrystalline silicon solar cell, in particular to a laminated passivation film on the front surface of the solar cell, in particular to a laminated composite passivation film for the front surface of the monocrystalline silicon solar cell. Background technique [0002] Monocrystalline silicon solar cells generate photogenerated carriers under photons, and carry out carrier recombination at the same time. Therefore, in order to improve the conversion efficiency of solar cells, it is necessary to reduce the recombination rate of carriers as much as possible. The recombination of photogenerated carriers can be divided into bulk recombination and surface recombination. Since monocrystalline silicon solar cells require high mass specific power, it is necessary to minimize the thickness of the cell, and when the silicon wafer is thinned , the surface effective lifetime is much smaller than the bulk lifetime, so the effect of sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0216H01L31/04B32B9/00H01L31/0236
CPCY02E10/50
Inventor 程鹏飞黄仑全余生
Owner DONGFANG ELECTRIC YIXING MAGI SOLAR POWER TECH
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