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Methods of making textured sheets for photovoltaic devices

A photovoltaic device and texture technology, applied in photovoltaic power generation, semiconductor devices, electrical components, etc., can solve problems such as loss of shape and inability to manufacture structures with high reproducibility, and achieve the effect of improving performance, excellent quality and performance

Inactive Publication Date: 2015-09-23
DSM IP ASSETS BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Structures with high reproducibility cannot be produced by this method, since such structures would lose their shape on hardening

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0043] Thermally liquefied polymethyl methacrylate (PMMA) was injected into a sealed nickel mold (33 x 33 x 0.15 cm) containing an array of pyramidal structures with a square base with a height of 1 mm. The liquefied polymer is hardened by cooling to about 40 degrees Celsius. After hardening, the mold is opened to obtain a textured polymer sheet. A total of four textured panels were applied to a 1 x 1 meter glass panel (substrate) by using a liquid adhesive. Glass plates including textured plates are used as cover plates for photovoltaic devices.

example 2

[0045] A 33 x 33 x 0.15 cm plate of PMMA was thermally softened by uniformly raising the temperature of the polymethyl methacrylate (PMMA) to approximately 135 degrees Celsius, which rubberized the material. Press a nickel mold of the same size into the softened PMMA by using a pressure of 150 bar. The mold contained an array of pyramidal structures with a square base with a height of 1 mm. The softened PMMA plate was hardened by cooling to about 40 degrees Celsius while maintaining the pressure of the nickel mold on the plate. After hardening, the mold is opened to obtain a textured polymer sheet. A total of four textured panels were applied to a 1 x 1 meter glass panel (substrate) by using a liquid adhesive with a refractive index (after hardening) of about 1.5. Glass plates including textured plates are used as cover plates for photovoltaic devices.

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Abstract

A method for producing a polymeric cover plate with a surface relief texture, whereby the at least one surface relief structure is made of structures, whereby each structure has a height of at least 0.5 mm, the method including thermally softening a polymer, bringing the softened polymer via pressure into contact with a mold which contains an inverse image of the desired surface relief texture, and hardening the softened polymer, while maintaining the pressure between the polymer and the mold.

Description

technical field [0001] The present invention relates to a method of making a polymer cover sheet. [0002] The obtained polymer cover sheet can be used directly as a cover sheet for photovoltaic devices or applied to one of the surfaces of the transparent substrate by using a suitable adhesive. A transparent substrate comprising one or more polymeric cover sheets can be used as another cover sheet for the photovoltaic device or on top of the cover sheet. Background technique [0003] Solar cells (photovoltaic cells or photovoltaic devices) are commonly used to convert light energy into electrical energy. This effect is called the photovoltaic effect. A solar cell includes an active layer composed of a light absorbing material that generates charge carriers when exposed to light. The active layer commonly used in photovoltaic devices is silicon. However, various materials such as gallium arsenide (GaAs), cadmium telluride (CdTe) or copper indium gallium diselenide (CIGS) ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0232H01L31/0236H01L31/18
CPCY02E10/50H01L31/04H01L31/18H01L31/0236H01L31/0232Y02E10/52B29C59/02H01L31/02366H01L31/048H01L31/054
Inventor B·斯莱格尔
Owner DSM IP ASSETS BV