Unlock instant, AI-driven research and patent intelligence for your innovation.

Layer system for solar cells

A technology of solar cells and layer systems, applied in the field of layer systems, can solve the problems of low efficiency of solar cells and unfavorable thin-layer cells, and achieve the effects of high stability, small efficiency changes, and high material output

Active Publication Date: 2014-04-30
SAINT GOBAIN VITRAGE SA
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the light absorbed in the buffer layer is discarded for power production, that is, the efficiency of the solar cell becomes smaller, which is not good for thin-layer cells

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Layer system for solar cells
  • Layer system for solar cells
  • Layer system for solar cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] according to figure 1 , the layer system according to the invention and its production method will first be discussed in depth below.

[0044] figure 1 A preferred embodiment of the layer system 1 according to the invention is shown purely schematically in section. The layer system 1 comprises a substrate 2 , a rear electrode 3 , an absorber layer 4 , a first buffer layer 5 , a second buffer layer 6 and a front electrode 7 .

[0045] The manufacturing method generally starts with thermal deposition of a back contact layer 3 composed of Mo on a glass substrate 2 . Instead of the rear electrode 3 made of Mo, it is also possible to use a coated electrode consisting of a first SiN partial layer applied to the glass substrate and a second Mo partial layer applied thereon, which improves the rear contact characteristics of the department. In another step, from Cu(In, Ga)(S, Se) 2 The formed absorber layer 4 is applied to the rear electrode 3 . Then, in another step fabr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to a layer system (1) for thin-film solar cells and solar modules based on CIS-absorbers (4). The layer system (1) according to the invention has a buffer layer (4) made of In2(S1−x,Sex)3+δ, wherein 0≰x≰1 and −1≰δ≰1. Additionally, the buffer layer (5) is amorphously designed. With this buffer layer (5), the disadvantages of CdS-buffers frequently used to date, namely toxicity and poor process integration, are overcome, whereby in addition to high efficiency, high long-term stability is also achieved; and thus again the disadvantages of conventional buffer layers alternative to CdS do not exist.

Description

technical field [0001] The invention relates to a layer system according to the preamble of claim 1 , in particular for thin-film solar cells, solar modules, etc., and a solar cell or solar cell module having the layer system. Background technique [0002] Thin-film systems for solar cells and solar modules are sufficiently well known and are available on the market in different embodiments depending on the substrate and the applied materials. The materials are chosen to maximize utilization of the incident solar spectrum. Thin-layer batteries composed of semiconductor materials, such as cadmium telluride (CdTe) or copper indium (gallium) sulfide selenide (Cu(In / Ga)(Se / S)), are commercially available. Thin-layer cells that are CIS or CIGS cells, where S can here, depending on the type of cell, represent sulfur and / or selenium. Most often, amorphous silicon (a:Si:H) is used for thin-film cells. Today, CIS thin-film cells achieve approximately the same efficiency as modules...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0336H01L31/032H01L31/0749
CPCH01L31/0322H01L31/0749Y02E10/541
Inventor J·帕尔姆
Owner SAINT GOBAIN VITRAGE SA