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Polysilicon solar cell and preparation method thereof

A solar cell and polysilicon technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problem of insufficient blue light absorption, and achieve the effect of improving photoelectric conversion efficiency

Inactive Publication Date: 2010-03-10
CHINALIGHT SOLAR
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of insufficient blue light absorption in visible light in the existing solar cell preparation technology, and propose a polycrystalline silicon solar cell and its preparation method

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  • Polysilicon solar cell and preparation method thereof
  • Polysilicon solar cell and preparation method thereof
  • Polysilicon solar cell and preparation method thereof

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] The polycrystalline silicon solar cell of the present invention comprises a positive electrode, an anti-reflection film, a PN junction, an aluminum back field, and a back electrode. The substrate material of the battery is P-type polysilicon, and the thickness ranges from 0.1 to 0.4mm. The front surface is an N-type region, forming a PN junction. There are grid-shaped metal silver electrodes on the front surface, and the backlight surface of the solar cell is a metal bottom silver electrode and an aluminum back field. The silver electrodes on the front surface and the backlight surface respectively form ohmic contacts with the N-type region and the P-type polysilicon substrate, and the entire front surface is evenly covered with an anti-reflection film. From the light-receiving surface to the backlight surface of the solar cell, there ...

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Abstract

The invention relates to a polysilicon solar cell. The front surface (illuminated surface) of the polysilicon solar cell is an N-type area and is provided with a grating-shaped metal silver electrode;and the backlight surface of the solar cell is provided with a metal bottom silver electrode and an Al-back field. The silver electrodes of the front surface and the backlight surface are in ohmic contact with the N-type area and a P-type polysilicon substrate respectively, and the whole front surface is uniformly covered with an antireflection film. The method for preparing the solar cell comprises the following steps: realizing a honeycomb-shaped design on the front surface of a silicon wafer by SiN4 protection, laser drilling and wool preparation by acid; and depositing the antireflectionfilm on the front surface of the cell by plasma chemical vapor deposition to reduce the reflection of blue light at maximum and improve the response ability of the solar cell in the short wavelength range.

Description

Technical field: [0001] The invention relates to a polycrystalline silicon solar cell and a preparation method thereof. Background technique: [0002] With the increasing tension of global energy sources, solar energy has been widely valued by countries all over the world due to its unique advantages such as no pollution and large market space. Many large companies in the world have invested in the research and development and production of solar cells. Obtaining electricity from solar energy requires photoelectric conversion through solar cells. Silicon solar cells are semiconductor electronic devices that effectively absorb solar radiation and convert it into electrical energy. They are widely used in various lighting and power generation systems. Among many kinds of solar cells, polycrystalline silicon solar cells have the largest market share in today's photovoltaic market. Its applications range from small civilian applications to large grid-connected power plants. It w...

Claims

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Application Information

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IPC IPC(8): H01L31/042H01L31/18H01L31/0216H01L31/0236
CPCY02E10/52Y02E10/50
Inventor 宋洋段野刘辉卢俊爱刘玲
Owner CHINALIGHT SOLAR
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