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Solar cell and preparation method thereof

A solar cell and electrode technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of grid shading and high resistivity, and achieve the effects of improving conversion efficiency, improving quality, and improving short-circuit current.

Pending Publication Date: 2018-12-21
德运创鑫(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a solar cell and its preparation method. The technical problem to be solved is to reduce the cost of the solar cell and solve the problems of shading of grid lines and high resistivity, so that it is more suitable for practical use.

Method used

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  • Solar cell and preparation method thereof
  • Solar cell and preparation method thereof
  • Solar cell and preparation method thereof

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preparation example Construction

[0064] A method for preparing a solar cell provided by an embodiment of the present invention includes the following steps:

[0065] A first electrode 21 is formed on the light-receiving side of the power generation body 1; a second electrode 22 is formed on the backlight side of the power generation body 1; wherein, the first electrode 21 includes a first graphene layer.

[0066] In the embodiment of the present invention, the power generating body 1 is obtained by a conventional preparation method, which will not be repeated here. Preferably, the power generation body 1 is a silicon heterojunction power generation body or a perovskite power generation body.

[0067] Further, the second electrode 22 includes a second graphene layer, a transparent conductive oxide layer or a metal layer; the embodiment of the present invention does not specifically limit the preparation method of the transparent conductive oxide layer or the metal layer, preferably, transparent conductive oxid...

Embodiment 1

[0084] A silicon heterojunction solar cell, such as image 3 As shown, it includes: an electrode body 1, a first electrode 21 and a second electrode 22, wherein the electrode body 1 includes in sequence from bottom to top: a P-type amorphous silicon doped layer 132, a second intrinsic layer of amorphous silicon 122 , an N-type silicon wafer 110 , a first intrinsic layer of amorphous silicon 121 and an N-type doped layer of amorphous silicon 131 .

[0085] The first electrode 21 is a first graphene layer, which is arranged on the upper surface of the N-type amorphous silicon doped layer 131;

[0086] The second electrode 22 is a second graphene layer disposed on the lower surface of the P-type amorphous silicon doped layer 132 .

[0087] The thickness of the N-type silicon wafer 110 is 120um, the thickness of the first amorphous silicon intrinsic layer 121 is 10nm, the thickness of the second amorphous silicon intrinsic layer 122 is 10nm, and the thickness of the N-type amorph...

Embodiment 2

[0090] A silicon heterojunction solar cell, such as Figure 4 Shown, its preparation method comprises the steps:

[0091] (1) Preparation of electrode body 1:

[0092] The electrode body 1 is manufactured by a conventional method, and the electrode body 1 is a heterojunction electrode body, which includes from bottom to top: a P-type amorphous silicon doped layer 132, a second amorphous silicon intrinsic layer 122, an N-type silicon A sheet 110, a first intrinsic layer of amorphous silicon 121 and an N-type doped layer of amorphous silicon 131;

[0093] (2) Preparation of the first electrode 21:

[0094] The first electrode 21 is prepared by a gallium-catalyzed chemical vapor deposition method, which specifically includes the following steps:

[0095] a. In the first chamber, gallium metal is used as a catalyst, and gallium is heated to 1200°C in a vacuum state, and 1 sccm of methane and 250 sccm of 6N argon are introduced for 300 seconds; methane is decomposed into carbon ...

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Abstract

The invention relates to a solar cell and a preparation method thereof. The solar cell includes a power generation body, a first electrode and a second electrode. The power generation body includes alight receiving side and a backlight side arranged opposite to each other. The first electrode is arranged on the light receiving side of the power generation body, and the second electrode is arranged on the backlight side of the power generation body. Wherein the first electrode comprises a first graphene layer. The solar cell of the invention adopts a graphene layer as a transparent conductivelayer, has the advantages of good conductivity and high light transmittance, solves the problems of light shielding of grid lines, high resistivity and high cost, and improves the conversion efficiency of the solar cell. The invention uses molten gallium-containing catalyst and inert gas containing alkane to directly grow graphene layer at low temperature, improves the quality of transparent conductive layer of graphene and simplifies the preparation step.

Description

technical field [0001] The invention relates to the battery field, in particular to a solar battery and a preparation method thereof. Background technique [0002] As the core component of the solar cell, the power generation body can convert light energy into electrical energy, which is finally collected by the electrodes on both sides of the power generation body. Most of the existing solar cells collect the current generated by metal grid lines or transparent conductive oxides (such as: ITO / FTO / AZO / IWO, etc.), and the transparent conductive oxide TCO is used as the anti-reflection layer and conductive layer of the solar cell. It is necessary to print low-temperature silver paste and electroplate copper grid lines on the transparent conductive oxide to complete the current collection. The silver grid lines of traditional crystalline silicon solar cells are burned through the anti-reflection film at high temperature and contact with the PN junction to collect current. [...

Claims

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Application Information

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IPC IPC(8): H01L31/0224H01L31/18
CPCH01L31/022425H01L31/022466H01L31/1884Y02E10/50Y02P70/50
Inventor 彭福国
Owner 德运创鑫(北京)科技有限公司
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