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A tandem solar cell

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

Active Publication Date: 2022-04-15
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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  • A tandem solar cell
  • A tandem solar cell
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Embodiment Construction

[0067] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying 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 to scale, some details have been exaggerated for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the figures, as well as their relative sizes and positional relationships are only exemplary, and in practice, there may be deviations due to manufacturing tolerances or technical limitations, and those skilled in the art should Regions / la...

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Abstract

The invention discloses a stacked solar cell, relates to the field of photovoltaic technology, and aims to improve the light energy utilization rate of the stacked solar cell, thereby improving the photoelectric conversion efficiency of the stacked solar cell. The tandem solar cell includes: a bottom cell and a top cell located on the bottom cell; the bottom cell includes a first doped part and a second doped part, and the first doped part and the second doped part form at least one PN The multi-carriers in the first doped part are the first type of carriers, and the multi-carriers in the second doped part are the second type of carriers; the bottom cell has a first electrode that runs through the bottom cell hole and the second electrode hole, the first electrode 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 doped part, and is used to lead out the power of the bottom cell and the top cell The first type of carriers; the second electrode is in contact with the second doped part for deriving the second type of carriers from the bottom cell and the top cell.

Description

technical field [0001] The present invention relates to the field of photovoltaic technology, in particular to a tandem solar cell. Background technique [0002] A tandem solar cell is a cell structure composed of a top cell and a bottom cell. The top cell is made of light-transmitting material with a wide bandgap. 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 through the top cell to the bottom cell and utilized by the bottom cell. Therefore, the tandem solar cell can utilize Sunlight has a wide wavelength range and has a high utilization rate of light energy. [0003] In the prior art, an interdigitated back contact (abbreviated as IBC) cell can be used as the bottom cell to absorb the carriers generated by the top cell, and extract the current carriers from the emitter and the back fi...

Claims

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Application Information

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Patent Type & Authority Patents(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