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A kind of solar cell sheet and its diffusion process

A technology of solar cells and diffusion process, applied in the field of solar cells, can solve problems such as low conversion efficiency of solar cells, and achieve the effects of high conversion efficiency, high conversion rate and reduction of packaging loss

Active Publication Date: 2016-06-15
ZHEJIANG GUANGLONG ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the actual production process, the conversion efficiency of solar cells using the one-step diffusion method in the prior art is generally low

Method used

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  • A kind of solar cell sheet and its diffusion process
  • A kind of solar cell sheet and its diffusion process
  • A kind of solar cell sheet and its diffusion process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, the solar battery sheet includes a plate-shaped body 1, one side of the body 1 is a positive electrode, and the other side of the body 1 is a negative electrode, and three main grids 2 and 96 fine grids 3 are evenly distributed on the positive electrode. , the main grid 2 and the fine grid 3 are vertically arranged and they are electrically connected, the spacing between each main grid 2 is 50 mm, the width of the main grid 2 is 1.2 mm, the spacing of the fine grid 3 is 1.2 mm, and the width of the fine grid 3 is 0.03 mm.

[0034] Such as figure 1 As shown, the main grid 2 is arranged longitudinally and uniformly by several main grid segments; the length of each main grid segment is 8 mm; the length of the fine grid 3 is 150 mm.

[0035] Such as figure 2 Shown, the diffusion process of this solar cell sheet, this process comprises the following steps:

[0036] A. Low-temperature deposition: Put the body into an ordinary diffusion furnace....

Embodiment 2

[0048] Such as figure 1 As shown, the solar battery sheet includes a plate-shaped body 1, one side of the body 1 is a positive electrode, and the other side of the body 1 is a negative electrode, and three main grids 2 and 96 fine grids 3 are evenly distributed on the positive electrode. , the main grid 2 and the fine grid 3 are vertically arranged and they are electrically connected, the spacing between each main grid 2 is 55 mm, the width of the main grid 2 is 1.5 mm, the spacing of the fine grid 3 is 1.8 mm, and the width of the fine grid 3 is 0.04mm.

[0049] Such as figure 1 As shown, the main grid 2 is arranged longitudinally and uniformly by several main grid segments; the length of each main grid segment is 10 mm; the length of the fine grid 3 is 160 mm.

[0050] Such as figure 2 Shown, the diffusion process of this solar cell sheet, this process comprises the following steps:

[0051] A. Low-temperature deposition: Put the body into an ordinary diffusion furnace,...

Embodiment 3

[0062] Such as figure 1 As shown, the solar battery sheet includes a plate-shaped body 1, one side of the body 1 is a positive electrode, and the other side of the body 1 is a negative electrode, and three main grids 2 and 96 fine grids 3 are evenly distributed on the positive electrode. , the main grid 2 and the fine grid 3 are vertically arranged and they are electrically connected, the distance between each main grid 2 is 50-52 mm, the width of the main grid 2 is 1.3 mm, the spacing of the fine grid 3 is 1.5 mm, and the fine grid 3 The width is 0.035mm.

[0063] Such as figure 1 As shown, the main grid 2 is arranged longitudinally and uniformly by several main grid segments; the length of each main grid segment is 9 mm; the length of the fine grid 3 is 155 mm.

[0064] Such as figure 2 Shown, the diffusion process of this solar cell sheet, this process comprises the following steps:

[0065] A. Low-temperature deposition: Put the body into an ordinary diffusion furnace...

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Abstract

The invention provides a solar battery piece and a diffusion process thereof, belongs to the technical field of solar batteries, and aims at solving the technical problem that the conversion efficiency of the solar batteries under the one-step diffusion method in the prior art is generally small. The solar battery piece comprises a plate-shaped solar battery piece body; a positive electrode is arranged at one side of the solar battery piece body, and while a negative electrode is arranged at the other side of the solar battery piece body; 3 main grids and 96 fine grids are uniformly distributed on the positive electrode; the main grids and the fine grids are vertically arranged and electrically connected; the space between every two main grids is 50 to 55mm; the main grids are 1.2 to 1.5mm in width; the space between every two fine grids. The solar battery piece has the advantages of being low in packaging loss and high in conversion rate.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and relates to a solar cell sheet and a diffusion process thereof. Background technique [0002] The production process of traditional polycrystalline solar cells mainly includes: texturing, diffusion, wet etching, PE coating, drying, printing back field, drying, printing back electrode, printing positive electrode, sintering and test sorting. The diffusion process directly affects the open circuit voltage of polycrystalline solar cells. The main influencing factor is the doping concentration on the surface of the diffusion. High doping concentration on the surface will cause heavy doping effect. The heavy doping effect will cause the narrowing of the forbidden band width, affect the intrinsic carrier concentration, affect the effective doping concentration and reduce the minority carrier lifetime. In silicon crystals, heavy doping can cause changes in the energy band structure, forming a so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0224H01L31/04H01L31/18
CPCH01L21/223H01L31/022433H01L31/1804H01L31/182Y02E10/546Y02E10/547Y02P70/50
Inventor 朱金浩蒋剑波王猛许布万光耀陈珏荣高非朱庆庆
Owner ZHEJIANG GUANGLONG ENERGY TECH
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