Methods for controlling optical property of wavelength conversion sheet and for producing wavelength conversion sheet, wavelength conversion sheet for cadmium telluride solar cell, and cadmium telluride solar cell

A technology of wavelength conversion and optical properties, which is applied in the field of cadmium telluride solar cells, can solve the problems of small Stokes shift, poor weather resistance, and low luminous efficiency, and achieve less reabsorption, high luminous efficiency, photoelectric Excellent conversion efficiency

Inactive Publication Date: 2010-12-08
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, although organic phosphors are excellent in transparency, they are poor in weather resistance, and in many cases, the shape of the absorption and emission spectra is broad, and there is a problem that the Stokes shift is small and the reabsorption is large, that is, "the luminous efficiency is not so high".

Method used

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  • Methods for controlling optical property of wavelength conversion sheet and for producing wavelength conversion sheet, wavelength conversion sheet for cadmium telluride solar cell, and cadmium telluride solar cell
  • Methods for controlling optical property of wavelength conversion sheet and for producing wavelength conversion sheet, wavelength conversion sheet for cadmium telluride solar cell, and cadmium telluride solar cell
  • Methods for controlling optical property of wavelength conversion sheet and for producing wavelength conversion sheet, wavelength conversion sheet for cadmium telluride solar cell, and cadmium telluride solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Polymethyl methacrylate resin (PMMA) (manufactured by Kuraray, trade name "PARAPET EH-1000P") was dissolved in toluene to prepare a 26% by weight transparent resin solution. Then, using "LUMOGEN F Yellow 083" (a fluorescent dye manufactured by BASF Corporation) as a phosphor, 0.3 g of this phosphor was dissolved in 9.7 g of methylene chloride to prepare a phosphor solution. Furthermore, this phosphor has a cyano group in the molecule. 10 g of the above-mentioned transparent resin solution and 0.61 g of the above-mentioned phosphor solution were mixed to prepare a varnish containing 0.7% by weight of the above-mentioned phosphor with respect to PMMA. The varnish was coated on a PET separator, and dried at 90° C. for 15 minutes to prepare a wavelength conversion sheet for a cadmium telluride solar cell with a thickness of 48 μm.

Embodiment 2

[0059] 10 g of the transparent resin solution prepared in the same manner as in Example 1 and 0.87 g of the phosphor solution prepared in the same manner as in Example 1 were mixed to prepare a varnish containing 1% by weight of the phosphor with respect to PMMA. The varnish was coated on a PET separator, and dried at 90° C. for 15 minutes to prepare a wavelength conversion sheet for a cadmium telluride-based solar cell with a thickness of 25 μm.

Embodiment 3

[0061] 10 g of the transparent resin solution prepared in the same manner as in Example 1 and 1.30 g of the phosphor solution prepared in the same manner as in Example 1 were mixed to prepare a varnish containing 1.5% by weight of the phosphor with respect to PMMA. The varnish was coated on a PET separator, and dried at 90° C. for 15 minutes to prepare a wavelength conversion sheet for a cadmium telluride-based solar cell with a thickness of 19 μm.

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Abstract

The present invention provides a method for controlling an optical property of a wavelength conversion sheet. The method is a method for controlling an optical property of a wavelength conversion sheet that contains a transparent resin and a phosphor and achieves wavelength conversion by absorbing light in a specific wavelength range other than a target wavelength range and emitting light in a target wavelength range, wherein the phosphor contains a phosphor having a perylene skeleton, and a stokes shift of the wavelength conversion sheet is controlled by adjusting a concentration of the phosphor having a perylene skeleton to the transparent resin in a range of 0.5% to 3.5% by weight.

Description

technical field [0001] The invention relates to an optical characteristic control method of a wavelength conversion sheet, a manufacturing method of the wavelength conversion sheet, a wavelength conversion sheet for a cadmium telluride solar cell, and a cadmium telluride solar cell. Background technique [0002] Various methods have been studied for improving the photoelectric conversion efficiency of solar cells. Among them, as technologies for improving photoelectric conversion efficiency through effective use of sunlight, there are, for example, concentrating technology, multi-junction technology, wavelength conversion by absorbing light of a specific wavelength band other than the target wavelength band and emitting light of the target wavelength band Conversion technology (solar light spectrum conversion technology), etc. Among them, wavelength conversion technology using phosphors has been studied in Japan from the latter half of the 1990s to the first half of the 200...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/055H01L31/04
CPCC09K2211/1011Y02E10/52H01L51/447H01L31/055H01L31/02322Y02E10/543C09K11/06Y02E10/549H10K30/87
Inventor 坂本亨枝长泽德
Owner NITTO DENKO CORP
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