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Photovoltaic module and method for producing same

Imported: 24 Feb '17 | Published: 09 Apr '02

Albert Plessing, Horst-Christian Langowski, Ulrich Moosheimer

USPTO - Utility Patents

Abstract

A description is given of a photovoltaic module (

1) in the form of a laminate, which as the core layer exhibits a solar cell system (

2) and encapsulation materials (

3, 3′) applied on both sides of the latter. According to the invention, at least one encapsulation material layer (

3′) consists of a sealing layer (

4′) and a barrier layer (

6), which consists of a plastic film or a plastic film composite, and on which an inorganic oxide layer (

7) separated out to the vapor phase is present.

Description

BRIEF DESCRIPTION OF DRAWINGS

The invention will now be described based on FIGS. 1 to

4:

FIG. 1 shows the structure of the photovoltaic module

1 according to the invention, which mainly consists of the solar cell system

2 and the encapsulation materials

3,

3′ enveloping the solar cell systems.

FIGS. 1

a and

1

b show variants Ia and Ib of the layer structure I in FIG.

1.

FIG. 2 shows an arrangement

13 for laminating the layers shown in FIG. 1 for manufacturing the photovoltaic module

1 according to the invention.

FIG. 3 shows the light permeability in different wavelength ranges of a plastic film vapor-plated with an inorganic oxide layer, which is provided within the encapsulating materials

3,

3′.

FIG. 4 shows the extent to which the photovoltaic module

1 according to the invention improves the barrier effect relative to water vapor due to the oxide layer

7 separated from the vapor phase.

Claims

1. A photovoltaic module in the form of a laminate, which as the core layer exhibits a solar cell system and encapsulation materials applied on both sides of the latter, wherein at least one encapsulation material layer comprises a sealing layer and a barrier layer, and that the barrier layer comprises a plastic film or a plastic film composite, which exhibits an inorganic oxide layer separated out of a vapor phase by physical vapor deposition and said sealing layer is arranged between said solar cell system and said barrier layer.

2. A photovoltaic module according to claim 1, wherein the inorganic oxide layer contains the elements aluminum or silicon, and is present in a thickness of 30 to 200 nm.

3. A photovoltaic module according to claim 1, wherein the inorganic oxide layer is permeable to light beams in the visible light wave range and near UV wavelength range, while it absorbs said beams in the UV wavelength range at shorter wavelengths.

4. A photovoltaic module according to claim 1, wherein the sealing layer consists of ethylene vinyl acetate (EVA).

5. A photovoltaic module according to claim 1, wherein the sealing layer consists of ionomers.

6. A photovoltaic module according to claim 1 wherein the plastic film on which the inorganic oxide layer is deposited consists of polyethylene terephthalate (PET) or ethylene tetrafluoroethylene copolymer (ETFE).

7. A photovoltaic module according to claim 1 wherein the inorganic oxide layer faces the solar cell system and directly contacts the adjacent sealing layer.

8. A photovoltaic module according to claim 1, wherein the inorganic oxide layer faces the solar cell system and contacts the adjacent sealing layer via a primer coat.

9. A photovoltaic module according to claim 1, wherein the inorganic oxide layer is enveloped on both sides by plastic films or composites, wherein at least one plastic film or plastic film composite acts as the barrier layer.

10. A photovoltaic module according to claim 9, wherein the inorganic oxide layer contacts the plastic films or composites via an adhesive layer and/or a hybrid layer comprised of organic/inorganic networks.

11. A photovoltaic module according to claim 1, wherein the inorganic oxide layer consists of SiOx, wherein the atomic ratio of silicon to oxygen x ranges from 1.3 to 1.7.

12. A procedure for manufacturing a photovoltaic module according to claim 1, comprising: