Solar cell module

Abstract

A solar cell module including: a solar cell; a first protection member provided on the light receiving surface side of the solar cell; a second protection member provided on the rear surface side of the solar cell; an encapsulant layer, including a first encapsulant layer disposed between the solar cell and the first protection member, and a second encapsulant layer disposed between the solar cell and the second protection member, which seals the solar cell; and a wavelength conversion substance, contained in at least the first encapsulant layer, which absorbs light having a specified wavelength, and converts the wavelength. The concentration of the wavelength conversion substance is higher in the first encapsulant layer than in the second encapsulant layer, and a resin constituting the second encapsulant layer has a smaller diffusion coefficient of the wavelength conversion substance than the diffusion coefficient of a resin constituting the first encapsulant layer.

1 . A solar cell module comprising:
 a solar cell;   a first protection member provided on a light receiving surface side of the solar cell;   a second protection member provided on a rear surface side of the solar cell;   an encapsulant layer that includes a first encapsulant layer disposed between the solar cell and the first protection member, and a second encapsulant layer disposed between the solar cell and the second protection member, and seals the solar cell; and   a wavelength conversion substance that is contained in at least the first encapsulant layer, wherein
 concentration of the wavelength conversion substance in the first encapsulant layer is higher than concentration of the wavelength conversion substance in the second encapsulant layer, and ( ) 
 a diffusion inhibiting layer constituted from a material having a smaller diffusion coefficient of the wavelength conversion substance than he diffusion coefficient of resin constituting the first encapsulant layer is provided between the first encapsulant layer and the second encapsulant layer. 
   
     
     
         2 . The solar cell module according to  claim 1 , wherein the material constituting the diffusion inhibiting layer has a higher storage elastic modulus at 25° C. to 90° C. than that of the resin constituting the first encapsulant layer. 
     
     
         3 . The solar cell module according to  claim 1 , wherein the material constituting the diffusion inhibiting layer has a smaller intermolecular void size at 25° C. to 90° C. than that of the resin constituting the first encapsulant layer. 
     
     
         4 . The solar cell module according to  claim 1 , wherein
 the wavelength conversion substance is an inorganic semiconductor nanoparticle.   
     
     
         5 . The solar cell module according to  claim 1 , wherein the wavelength conversion substance is a luminescent metal complex. 
     
     
         6 . The solar cell module according to  claim 1 , wherein the wavelength conversion substance is a fluorescence dye. 
     
     
         7 . The solar cell module according to  claim 1 , wherein
 concentration of the wavelength conversion substance in a first region of the first encapsulant layer closer to the first protection member is higher than in a second region of the first encapsulant layer closer to the solar cell.   
     
     
         8 . The solar cell module according to  claim 1 , wherein
 a front surface side of the diffusion inhibiting layer has concave-convex pattern arranged in width direction of the diffusion inhibiting layer, and the front surface side is faces the first encapsulant layer.   
     
     
         9 . The solar cell module according to  claim 1 , wherein
 the diffusion inhibiting layer comprising a metal layer at a front surface side of the diffusion inhibiting layer, and the front surface side is faces the first encapsulant layer.   
     
     
         10 . The solar cell module according to  claim 9 , wherein
 the resin layer of the diffusion inhibiting layer is arranged between the metal layer and the solar cell, and the metal layer and the solar cell are insulated each other.   
     
     
         11 . The solar cell module according to  claim 1 , wherein
 the diffusion inhibiting layer comprising an inorganic compound layer at the front surface side of the diffusion inhibiting layer.