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A kind of solar cell and preparation method thereof

A solar cell and positive electrode technology, which is applied in the field of solar cells, can solve the problems of high reflectivity and low conversion efficiency, and achieve the effects of low reflectivity, low cost, and simple and feasible process

Active Publication Date: 2015-11-04
CHINT NEW ENERGY TECH (HAINING) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the shortcomings of high reflectivity and low conversion efficiency of diamond wire-cut silicon wafer cells, the invention discloses a method for preparing a solar cell and a solar cell

Method used

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  • A kind of solar cell and preparation method thereof
  • A kind of solar cell and preparation method thereof
  • A kind of solar cell and preparation method thereof

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Embodiment Construction

[0041] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily limiting the present invention.

[0042] refer to Figure 4 , Figure 4 It is a schematic flow chart of a specific embodiment of a method for preparing a solar cell according to the present invention.

[0043] Step S101 , etch...

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Abstract

The invention discloses a manufacturing method of a solar battery. The manufacturing method includes steps of sequentially subjecting a silicon wafer cut by a diamond line to alkaline corrosion and acidic corrosion; subjecting the corroded silicon wafer to reaction ion etching and felting; forming a P dispersion layer on the front side of the silicon wafer, removing PSG (phospho silicate glass)and the surrounding P dispersion layer on the front side of the silicon wafer; forming an antireflective film on the front side of the silicon wafer, forming a back electrode and an aluminum back on the back of the silicon wafer; and forming a positive electrode on the front side of the silicon wafer. The invention further provides a solar cell manufactured by the above method. By the manufacturing method, felt structure of the silicon wafer cut by the diamond line can be effectively improved and photoelectric conversion efficiency of the solar cell is improved.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a solar cell based on a diamond wire-cut silicon wafer and a preparation method thereof. Background technique [0002] The market share of crystalline silicon solar cells in photovoltaic cells remains at about 90%, occupying the dominance of the entire photovoltaic industry, and the cost of silicon wafers is 60% to 70% of the cost of batteries. Research hotspots for institutions and manufacturing companies. Cutting is required from silicon ingots to silicon wafers, so reducing cutting costs is of great significance. At present, the market mainly adopts free abrasive mortar multi-wire cutting, but this technology has the following disadvantages: (1) It needs silicon carbide mortar to cooperate with cutting, and the cost is high; (2) It is difficult to recycle the mortar, so it is easy to cause pollution; (3) Long cutting time , easily disconnected, etc. [0003] In order to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18C30B33/10H01L31/068
CPCY02E10/50Y02P70/521Y02E10/547Y02P70/50
Inventor 石强韩玮智牛新伟蒋前哨李永辉仇展炜
Owner CHINT NEW ENERGY TECH (HAINING) CO LTD