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Interdigital back contact solar cell with three output ends

A solar cell and three-terminal output technology, which is applied in the field of solar cells, can solve the problems of high manufacturing cost and high cost of IBC solar cells, and achieve the effects of improving aggregation, reducing the cost of silicon wafers, and reducing recombination

Inactive Publication Date: 2017-01-18
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of such silicon wafers is relatively high, resulting in high manufacturing costs for IBC solar cells

Method used

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  • Interdigital back contact solar cell with three output ends
  • Interdigital back contact solar cell with three output ends
  • Interdigital back contact solar cell with three output ends

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown, the three-terminal output back-contact solar cell of this embodiment includes a cell substrate 4 provided with a light absorbing layer and a highly doped p + region 5 and highly doped n + Region 6, highly doped p + region 5 and highly doped n + A PN junction is formed at the junction of region 6 and the battery matrix; highly doped p + region 5 and highly doped n + Regions 6 respectively lead out current output terminals through silver grid lines 7 on the back surface, which are respectively hole output terminals and electron output terminals. The front surface of the battery substrate 4 prepares the front surface p + Layer 3, which forms a full-area PN junction at the junction with the battery substrate 4, is drawn out through the silver grid line 1 on the front surface to form a third current output terminal, which is the output terminal of minority carriers in the base region. Front surface p + A passivation anti-reflection film 2 is...

Embodiment 2

[0041] Such as figure 2 As shown, the three-terminal output back-contact solar cell of this embodiment includes a cell substrate 4 provided with a light absorbing layer and a highly doped p + region 5 and highly doped n + Region 6, highly doped p + region 5 and highly doped n + A PN junction is formed at the junction of region 6 and the battery matrix; highly doped p + region 5 and highly doped n + Regions 6 respectively lead out current output terminals through silver grid lines 7 on the back surface, which are respectively hole output terminals and electron output terminals. The front surface of the battery substrate 4 prepares the front surface p + Layer 3, front surface p + Layer 3 is a highly doped p-type a-Si:H thin film, which forms a full-area PN junction at the junction with the battery substrate 4, and is drawn out through the silver grid line 1 on the front surface to form a third current output terminal. The current output terminal is Base region minority c...

Embodiment 3

[0051] Such as image 3 As shown, the three-terminal output back-contact solar cell of this embodiment includes a cell substrate 4 provided with a light absorbing layer and a highly doped p + region 5 and highly doped n + Region 6, highly doped p + region 5 and highly doped n + A PN junction is formed at the junction of region 6 and the battery matrix; highly doped p + region 5 and highly doped n + Regions 6 respectively lead out current output terminals through silver grid lines 7 on the back surface, which are respectively hole output terminals and electron output terminals. The front surface of the battery substrate 4 prepares the front surface p + Layer 3, front surface p + Layer 3 is a highly doped p-type a-Si:H film, which forms a full-area PN junction at the junction with the battery substrate 4, and is drawn out through a transparent conductive film to form a third current output terminal, which is a minority of the base area. carrier output. Front surface p +...

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PUM

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Abstract

The invention discloses an interdigital back contact solar cell with three output ends. The solar cell comprises a cell body which includes a front surface and a back surface, the back surface is provided with a highly doped p+ region and a highly doped n+ region, the highly doped p+ region and the highly doped n+ region with an interface of the cell body form a PN node, current output ends are led out of the highly doped p+ region and the highly doped n+ region, and the front surface of the cell body is provided with a PN node and thus, a third current output end is formed. The solar cell can facilitate bidirectional flow of photoproduction carriers in the solar cell, reduce combination of the photoproduction carriers, and improves the output efficiency.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a three-terminal output interdigitated back-contact solar cell. Background technique [0002] In today's research on high-efficiency solar cells, solar cells with an interdigitated back contact (IBC) structure are an important research direction. Compared with conventional solar cells, IBC solar cells have a unique structure. Taking an IBC solar cell with an n-type silicon substrate as an example, its structure generally includes: a cell substrate as a light absorbing layer, a passivation anti-reflection film covering the front surface of the cell substrate, and an interdigitated high doped p + regions and interdigitated highly doped n + Area. The two highly doped regions respectively lead to the current output terminals, which are used as the positive and negative poles of the battery. That is, the positive and negative output terminals of the IBC solar cell are located on the ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/068
CPCH01L31/022441H01L31/0682H01L31/0684Y02E10/547
Inventor 沈辉李圣浩吴伟梁
Owner SUN YAT SEN UNIV