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Layer system for thin-film solar cells

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

Active Publication Date: 2015-04-15
(CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in previous developments of the layer systems and production methods it has been shown that the efficiency of solar cells with an indium sulfide buffer layer is lower than that of a solar cell with a CdS buffer layer

Method used

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  • Layer system for thin-film solar cells
  • Layer system for thin-film solar cells
  • Layer system for thin-film solar cells

Examples

Experimental program
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Embodiment Construction

[0080] figure 1 A preferred embodiment of a thin-film solar cell 100 according to the invention with a layer system 1 according to the invention is shown purely schematically in a cross-sectional view. The thin-film solar cell 100 contains a substrate 2 and a back electrode 3 . The layer system 1 according to the invention is arranged on the back electrode 3 . The layer system 1 according to the invention comprises an absorbent layer 4 and a buffer layer 5 . A second buffer layer 6 and a front electrode 7 are arranged on the layer system 1 .

[0081] The substrate 2 here consists, for example, of inorganic glass, wherein other insulating materials having sufficient strength and inert properties with respect to the process steps carried out during the production of the thin-film solar cell 100 can likewise be used. Depending on the layer thickness and specific material properties, the substrate 2 can be configured as a rigid plate or as a flexible membrane. In the present ...

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Abstract

The invention relates to a layer system (1) for thin-film solar cells (100) and solar panels, said system comprising an absorber layer (4) containing a chalcogenide semiconductor and a buffer layer (5) which is arranged on the absorber layer (4) and contains halogen-enriched InxSy, where 2 / 3 <= x / y <= 1. The buffer layer (5) consists of a first layer region (5.1) adjoining the absorber layer (4) and containing a halogen mole fraction A1 and a second layer region (5.1) adjoining the first layer region (5.2) and containing a halogen mole fraction A2. The ratio of A1 / A2 is >=2 and the layer thickness (d1) of the first layer region (5.1) <= 50% of the layer thickness (d) of the buffer layer (5).

Description

technical field [0001] The invention relates to a layer system for thin-film solar cells and a method for producing the layer system. Background technique [0002] Thin-film systems for solar cells and solar modules are sufficiently known and are available on the market in different embodiments depending on the substrate and the applied materials. Materials are chosen to maximize the use of the incident solar spectrum. Due to physical characteristics and process operability, there are amorphous silicon, non-microcrystalline silicon or polycrystalline silicon, cadmium telluride (CdTe), gallium arsenide (GaAs), copper-indium-(gallium)-selenide-sulfide (Cu (In, Ga)(S, Se) 2 ), copper-zinc-tin-thioselenides (CZTS from the group of kesterites), and thin-layer systems of organic semiconductors are particularly suitable for use in solar cells. Quinary Semiconductor Cu(In, Ga)(S, Se) 2 Belongs to the group of chalcopyrite semiconductors, often referred to as CIS (copper indium d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/032H01L31/18H01L31/0392
CPCH01L31/18H01L31/0322H01L31/03923H01L31/0326Y02E10/541Y02P70/50H01L31/032H01L31/0324H01L31/0392
Inventor J·帕尔姆S·波尔纳T·哈普T·达利博尔S·约斯特R·迪特米勒
Owner (CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD