Tandem solar cell and manufacturing method

A technology of solar cells and manufacturing methods, applied in circuits, photovoltaic power generation, electrical components, etc., to achieve high efficiency, reduce light absorption, and solve the effect of lattice mismatch

Inactive Publication Date: 2011-11-23
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above problems, the present invention provides a stacked solar cell, which can effectively solve the problems of cell efficiency and cost

Method used

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  • Tandem solar cell and manufacturing method
  • Tandem solar cell and manufacturing method

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Embodiment Construction

[0027] The present invention will be described in detail below with examples in conjunction with the accompanying drawings.

[0028] like figure 1 As shown, the stacked solar cell structure of this embodiment is a solar cell vertically integrated with two solar cell units, and its structure includes an upper cell unit 10 and a bottom cell unit 11, the top of the upper cell unit 10 and the bottom of the bottom cell unit 11 An electrode 9 is provided; a metal contact layer 8 is also provided between the upper cell and the bottom cell. The upper battery unit 10 includes the n-type substrate 4 , the tunnel junction 3 and the double-junction battery unit 12 from bottom to top; the bottom battery unit 11 includes the substrate 7 and the double-junction battery unit 56 from bottom to top.

[0029] The manufacturing method of this laminated solar cell comprises the following steps:

[0030] Fabrication of the bottom cell 11 : the double junction cell 56 is grown on the substrate 7 ....

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PUM

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Abstract

The invention relates to the technical field of solar cells, in particular to a tandem solar cell and a manufacturing method. The tandem solar cell comprises at least one upper cell unit and a bottom cell unit, wherein the top of the upper cell unit and the bottom of the bottom cell unit are provided with electrodes; the upper cell unit comprises an n-type substrate and a tunnel junction formed on the n-type substrate; the tunnel junction consists of an extremely highly-doped p-gallium arsenide or n-type gallium arsenide thin film; and a metal contact layer also can be arranged between the upper cell unit and the bottom cell unit. In the tandem solar cell, on one hand, a p-type substrate of the upper cell unit is changed into the n-type substrate to greatly improve the transmission efficiency of light rays; and on the other hand, anti-configuration is performed by introducing a tunnel junction structure to solve the problem of growth material lattice mismatching. Two dual-junction cell units are combined to form the four-junction solar cell in a vertical integration way by the metal contact layer to realize relatively higher photoelectric conversion efficiency.

Description

technical field [0001] The invention relates to the field of manufacture and application of solar cells, in particular to a stacked solar cell using an n-type substrate and a tunnel junction and a manufacturing method. Background technique [0002] Existing mass-produced solar cells are mainly made of materials such as silicon and GaAs. The efficiency of single-junction cells using a single material generally cannot be made very high. The usual way is to grow multiple materials such as GaInP, InGaAs and Ge on the same substrate, and then make solar cells. The sun's rays are incident on the surface of the battery, and the wavelength can be absorbed by various materials in sequence from short to long wavelengths, so as to make full use of the solar spectrum and improve the efficiency of the battery. However, the problem brought about by this is that too many material systems are used on the same substrate, resulting in serious lattice mismatch, which makes the quality of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/142H01L31/06H01L31/18H01L31/046
CPCY02E10/50Y02P70/50
Inventor 季莲杨辉董建荣张耀辉陆书龙黄寓洋赵勇明
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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