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Solar cell and preparation method thereof

A technology of solar cells and back electrodes is applied in the field of solar power generation to achieve the effects of avoiding direct contact, improving conversion efficiency, good thermal stability and optical performance

Pending Publication Date: 2021-03-23
CSI CELLS CO LTD +1
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  • Abstract
  • Description
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Problems solved by technology

[0003] The front side of the above-mentioned PERC battery is usually printed and sintered after depositing a passivation anti-reflection layer to obtain a front electrode that penetrates the passivation anti-reflection layer and realizes ohmic contact with the silicon chip. The recombination loss of the binding site has become an important constraint factor that limits the further improvement of the efficiency of PERC cells

Method used

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

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Embodiment Construction

[0029] The present application will be described in detail below in conjunction with the implementations shown in the accompanying drawings. However, this embodiment does not limit the present application, and any structural, method, or functional changes made by those skilled in the art according to this embodiment are included in the protection scope of the present application.

[0030] ginseng figure 1 As shown, the solar cell 100 provided in the present application includes a silicon wafer 10 , a front electrode 20 and a back electrode 30 respectively disposed on opposite sides of the silicon wafer 10 , and a diffusion layer 11 is formed on the front surface of the silicon wafer 10 . Here, the silicon wafer 10 adopts a P-type silicon wafer, and is reversely doped to obtain the N-type diffusion layer 11; the front electrode 20 is set as a silver electrode; the back electrode 30 is set as a silver-aluminum electrode .

[0031] The silicon wafer 10 has a first region and a ...

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Abstract

The invention provides a solar cell and a preparation method thereof. The solar cell comprises a silicon wafer, and a front electrode and a back electrode which are respectively arranged at two sidesof the silicon wafer; a diffusion layer is formed at the front surface of the silicon wafer; the silicon wafer is provided with a first area and a second area; the solar cell further comprises a tunneling layer, a doped silicon carbide layer and an antireflection layer, wherein the tunneling layer and the doped silicon carbide layer are sequentially arranged on the front face of the first area, the antireflection layer is arranged on the doped silicon carbide layer and the diffusion layer of the second area; and the front electrode penetrates through the antireflection layer and makes contactwith the doped silicon carbide layer. The composite loss and contact resistance of the front electrode position of the solar cell are reduced, the light absorption of the surface of the solar cell isensured, and the conversion efficiency is improved.

Description

technical field [0001] The present application relates to the technical field of solar power generation, in particular to a solar cell and a preparation method thereof. Background technique [0002] With the rapid development of photovoltaic technology, the market demand for high-efficiency cells and modules is also increasing. As far as crystalline silicon solar cells are concerned, the PERC (Passivated Emitter and Rear Cell) cells that have attracted much attention in recent years mainly reduce the recombination of surface carriers through the back passivation film and improve the conversion efficiency of cells. Research on this type of cells is also concentrated in Design and improvement of the structure of the above-mentioned back passivation film. [0003] The front side of the above-mentioned PERC battery is usually printed and sintered after depositing a passivation anti-reflection layer to obtain a front electrode that penetrates the passivation anti-reflection laye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/02H01L31/0216H01L31/054H01L31/18B82Y40/00
CPCH01L31/02161H01L31/02008H01L31/1804H01L31/0543B82Y40/00Y02E10/52Y02P70/50Y02E10/547
Inventor 邓伟伟陈海燕熊震蒋方丹邢国强
Owner CSI CELLS CO LTD
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