Two-sided passivation efficient heterojunction battery and manufacturing method thereof

A heterojunction cell and double-sided passivation technology, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of complex manufacturing process, high equipment requirements, and difficulty in mass production, so as to improve the internal reflection of the back , improve short-circuit current, increase the effect of repeated use

Inactive Publication Date: 2013-11-06
GD SOLAR
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

They all use high-quality silicon substrates, perfect surface light-trapping structures, excellent surface passivation technology, and unique cell structures. The production process is very complicated and requires high equipment, so it is difficult to mass produce

Method used

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  • Two-sided passivation efficient heterojunction battery and manufacturing method thereof
  • Two-sided passivation efficient heterojunction battery and manufacturing method thereof

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the examples, but not as a limitation of the present invention.

[0014] See figure 1 The double-sided passivated high-efficiency heterojunction cell includes a crystalline silicon base layer 1, an amorphous n layer 2, a positive passivation layer 3 and a positive electrode 7 are arranged on the front surface of the crystalline silicon base layer 1 in sequence, and the amorphous n layer 2 and the crystalline silicon base layer 1 A solar PN junction is formed, and the rear surface of the crystalline silicon base layer 1 is provided with a back passivation layer 4 , an intrinsic hydrogenated silicon film 5 , a heavily doped hydrogenated silicon film 6 , a transparent conductive film TCO8 and a back electrode 9 . The positive passivation layer 3 and the back passivation layer 4 can be a single-layer passivation film structure or a double-layer passivation film structure. For a single-layer passivati...

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Abstract

The invention discloses a two-sided passivation efficient heterojunction battery which comprises a crystalline silicon substrate. An amorphous n layer, a positive passivation layer and a positive electrode are sequentially arranged on the front surface of the crystalline silicon substrate. The amorphous n layer and the crystalline silicon substrate form a solar PN junction. A back passivation layer, an intrinsic silicon hydride thin film, a heavy doping silicon hydride thin film, a transparent conducting film TCO and a back electrode are sequentially arranged on the rear surface of the crystalline silicon substrate. The invention further discloses a manufacturing method of the two-sided passivation efficient heterojunction battery. The two-sided passivation efficient heterojunction battery combines common advantages of a traditional crystalline silicon battery and a thin-film battery, lowers the load on the back surface, increases open circuit voltage, enhances long wave absorption, increases short circuit currents, and can realize over 20% of photoelectric conversion efficiency.

Description

technical field [0001] The invention relates to a heterojunction solar cell and a manufacturing method thereof, in particular to a double-sided passivated high-efficiency heterojunction cell and a manufacturing method thereof, and belongs to the technical field of solar cell manufacturing. Background technique [0002] The current commercial solar cell production process is simple, the manufacturing cost is relatively low, and it is suitable for industrialization and automation, so it is widely used. However, this process also has certain disadvantages, mainly because the technology is relatively simple and the conversion efficiency of solar cells is relatively low. [0003] Compared with traditional technology, major research institutions around the world have developed a series of high-efficiency crystalline silicon solar cells with conversion efficiency exceeding 20%, such as PERL cells, PERC cells, PERT cells, OECO cells, LFC cells, MWT cells, EWT cells, etc. They all u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0747H01L31/0216H01L31/18H01L31/20
CPCY02E10/50Y02P70/50
Inventor 赵会娟张东升
Owner GD SOLAR
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