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Three terminal tandem solar generation unit

A power generation unit and solar energy technology, applied in photovoltaic power generation, electrical components, circuits, etc., can solve problems such as the inability to use PERC batteries

Pending Publication Date: 2021-11-02
トタルエネルジエスウ +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the 3T configuration usually requires an interdigitated back contact (IBC), which cannot be used in mass-produced low-cost PERC cells (passivated emitter and rear cell)

Method used

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  • Three terminal tandem solar generation unit
  • Three terminal tandem solar generation unit
  • Three terminal tandem solar generation unit

Examples

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Embodiment Construction

[0079] The following implementations are examples. Although this specification refers to one or more embodiments, this does not mean that each reference numeral refers to the same embodiment or that a feature is only applicable to a single embodiment. Simple features of different embodiments may also be combined to provide other embodiments.

[0080] The invention relates to a stacked solar power unit comprising three terminals. Such tandem cells comprise two different absorbing layers arranged in series, having two different bandgaps and configured to absorb different parts of the spectrum. Three terminals are obtained by using two interdigitated contacts with two different polarities on one side of the stacked solar power unit. In this example, the interdigitated contacts are provided on the front side of the tandem solar power unit, which allows the use of standard off-the-shelf cells as the back cell of the tandem solar power unit. Also, one of the absorbing layers is m...

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Abstract

The present invention refers to a three terminal tandem solar generation unit (1) comprising: - a first absorbing layer (7) made of a perovskite type compound, - a second absorbing layer (11, 11'), - a first and a second interdigitated front contacts (5a, 5b) arranged on the front side of the first absorbing layer (7), the first front contact (5a) having a first polarity and the second front contact (5b) having a second polarity, - a back contact (17, 17') having the first or the second polarity arranged on the back side of the second absorbing layer (11, 11'), - an interface layer (9, 90, 9', 90') arranged between the first (7) and the second (11, 11') absorbing layers comprising a first semiconductor sub-layer (9a, 90a, 9a', 90a') doped according to the first polarity and a second sub-layer (9b, 90b, 9b', 90b') doped according to the second polarity and configured for enabling carriers associated with a polarity different than the polarity of the back contact (17, 17') to be transferred from the second absorbing layer (11, 11') to the first absorbing layer (7) to be collected by the front contact (5a, 5b) having a polarity different than the polarity of the back contact (17, 17').

Description

technical field [0001] The present invention relates to photovoltaic power generation, and in particular to solar power units capable of converting solar energy into electricity. Background technique [0002] With climate change, global warming and the depletion of fossil fuels, numerous technologies have been developed in recent years to use alternative energy sources, especially renewable energy sources. [0003] One of the main technologies involves the use of photovoltaic cells to convert solar energy into electricity. [0004] A solar cell includes a P-N junction in which light is absorbed to generate electron-hole pairs and an opposite electrode for collecting electrons on one side and holes on the other side. [0005] In order to increase the efficiency of solar cells, one approach is to stack several solar cells to form a multi-contact or tandem solar cell. [0006] Different types of tandem solar cells have been developed, but each configuration has some drawbacks...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/078H01L31/0224H01L51/44H01L27/30
CPCH01L31/022433H01L31/078Y02E10/549Y02P70/50H10K30/57H10K30/81H10K85/50H01L31/0475H01L31/022441
Inventor 弗洛里安·伊勒特菲利普·舒尔茨艾蒂安·德哈伊
Owner トタルエネルジエスウ