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Laminated solar cell

A solar cell and stack technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of low efficiency of stacked cells

Active Publication Date: 2020-12-15
LONGI GREEN ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the carriers generated by the top cell will recombine to a certain extent in the IBC cell, resulting in a relatively low efficiency of the laminated cell

Method used

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  • Laminated solar cell
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Embodiment Construction

[0067] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. It should be understood, however, that these descriptions are exemplary only, and are not intended to limit the scope of the present disclosure. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts of the present disclosure.

[0068] Various structural schematic diagrams according to embodiments of the present disclosure are shown in the accompanying drawings. The figures are not drawn to scale, with certain details exaggerated and possibly omitted for clarity of presentation. The shapes of the various regions and layers shown in the figure, as well as their relative sizes and positional relationships are only exemplary, and may deviate due to manufacturing tolerances or technical limitations in practice, and those skilled in the art will Regions / layers with different shapes, ...

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Abstract

The invention discloses a laminated solar cell, relates to the technical field of photovoltaics, and aims to improve the light energy utilization rate of the laminated solar cell so as to improve thephotoelectric conversion efficiency of the laminated solar cell. The laminated solar cell comprises a bottom cell and a top cell located on the bottom cell. The bottom cell comprises a first doping part and a second doping part, the first doping part and the second doping part form at least one PN junction, multiple sub-carriers of the first doping part are first type carriers, and multiple sub-carriers of the second doping part are second type carriers; the bottom battery is provided with a first electrode hole and a second electrode hole which penetrate through the bottom battery, the firstelectrode is formed in the first electrode hole, and the second electrode is formed in the second electrode hole; the first electrode is in contact with the first doping part and is used for leading out the first type of carriers of the bottom cell and the top cell; and the second electrode is in contact with the second doping part and is used for leading out the second type of carriers of the bottom cell and the top cell.

Description

technical field [0001] The invention relates to the field of photovoltaic technology, in particular to a laminated solar cell. Background technique [0002] A tandem solar cell is a battery structure composed of a top cell and a bottom cell. The top cell is made of a light-transmitting material with a wide band gap. The bottom cell is made of a light-transmitting material with a narrow band gap. Based on this, sunlight with a shorter wavelength can be utilized by the top cell located above, and sunlight with a longer wavelength can be transmitted into the bottom cell through the top cell and utilized by the bottom cell. Therefore, stacked solar cells can utilize The wavelength range of sunlight is relatively wide, and it has a high utilization rate of light energy. [0003] In the prior art, an interdigitated back contact (IBC) battery can be used as the bottom battery to absorb the carriers generated by the top battery and extract the current from the emitter and back fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0687H01L31/0216H01L31/0224
CPCH01L31/022433H01L31/02167H01L31/0687Y02E10/544H01L31/022441H01L31/022458H01L31/035272H01L31/03529H01L31/078H01L31/02363H01L31/0725H01L31/0682H01L31/047H01L31/02164H01L31/02168H01L31/0288H01L31/035218H01L31/1868
Inventor 李子峰吴兆徐琛
Owner LONGI GREEN ENERGY TECH CO LTD