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Multi-junction solar cell

A solar cell and sub-battery technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problem that batteries cannot be put into operation independently of each other at the same time

Inactive Publication Date: 2016-02-24
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disadvantage of this double junction solar cell is that the two sub-cells cannot be put into operation at the same time independently of each other

Method used

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Embodiment Construction

[0070] The inventors propose to fabricate multijunction solar cells using an integration called "monolithic" integration, and use layers doped with opposite conductivity types of tunnel diodes placed between the different subcells so that the different subcells can interact with each other. Connect independently.

[0071] figure 1 is a cross-sectional view schematically showing an embodiment of a double junction solar cell according to the present invention.

[0072] The solar cell comprises a stack of two subcells 23 and 25 , with a tunnel diode 27 inserted between subcell 23 and subcell 25 . Each subcell 23, 25 consists of a stack of semiconductor layers forming a PN junction.

[0073] Subcell 23 includes two main faces 22 and 24 and subcell 25 includes two main faces 26 and 28 . Face 22 and face 28 are placed at opposite ends of the stack. As in all embodiments to be described below, in this embodiment the face 28 of the solar cell is preferably the face intended to be ...

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Abstract

The invention relates to a solar cell including a stack of at least two subcells (23, 25), a tunnel diode (27) comprising first and second stacked layers (29, 31) which are highly doped with opposite conductivity types, said tunnel diode being placed between two adjacent subcells; a first electrode (35) and a second electrode (39) in contact with one (28) and the other (22), respectively, of the surfaces at the ends of the stack; and for at least one tunnel diode (27), a third electrode (41) and a fourth electrode (43) in electrical contact with the first layer (31) and with the second layer (29), respectively, of the tunnel diode.

Description

technical field [0001] The present invention relates to multijunction solar cells and methods for producing such solar cells. More specifically, the present invention relates to multi-junction solar cells for photovoltaic applications. Background technique [0002] In the field of photovoltaic solar cells with high solar energy conversion efficiency, attempts are made to optimize the collection of photons of the incident solar spectrum. [0003] Solar cells known as "multi-junction" cells have been proposed. A multi-junction solar cell comprises a stack of multiple subcells, where each subcell consists of a stack of different semiconductor layers forming a PN junction. The PN junction of each subcell is formed such that each subcell has a different bandgap energy. Each subcell thus absorbs a reduced portion of the solar spectrum but with high efficiency. This results in an increased overall efficiency of such solar cells compared to solar cells with a single silicon junc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/0725H01L31/043
CPCH01L31/022425H01L31/043Y02E10/50H01L31/18H01L31/0725
Inventor 马蒂厄·鲍德瑞特托马斯·西格纳玛谢克斯
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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