Photovoltaic module and method for manufacturing photovoltaic module

Abstract

An object of the present invention is to provide a photovoltaic module that achieves a reduction in adverse influence of damage accumulated in a collector electrode provided on the light receiving surface side, and a method for manufacturing the photovoltaic module. To this end, in a photovoltaic module of the present invention, the degree of cross-linkage of the second region of the sealing material that is in contact with the back surface of the solar cell is smaller than that of the first region of the sealing material that is in contact with the light receiving surface of the solar cell.

1 . A photovoltaic module comprising:
 a solar cell having a receiving surface allowing light to enter therein, and a back surface provided on the opposite side of the light receiving surface;   a light receiving surface side supporting member provided at the light receiving surface side of the solar cell;   a back surface side supporting member provided at the back surface side of the solar cell; and   a sealing material for sealing the solar cell between the light receiving surface side supporting member and the back surface side supporting member; wherein   the sealing material includes a first region that is in contact with the light receiving surface, and a second region that is disposed between the back surface of the solar cell and the back surface side supporting member, and   a gel fraction of the second region is smaller than a gel fraction of the first region by at least 50%.   
     
     
         2 . The photovoltaic module of  claim 1 , wherein the gel fraction of the second region is 13% or less. 
     
     
         3 . The photovoltaic module of  claim 1 , wherein the gel fraction of the second region is 0%. 
     
     
         4 . The photovoltaic module of  claim 2 , wherein the gel fraction of the second region is more than 0%. 
     
     
         5 . The photovoltaic module of  claim 1 , wherein the gel fraction of the first region is 87% or more. 
     
     
         6 . The photovoltaic module of  claim 4 , wherein the gel fraction of the second region is 87% or more. 
     
     
         7 . A photovoltaic module comprising:
 a solar cell having a light receiving surface allowing light to enter therein, and a back surface provided on the opposite side of the light receiving surface;   a light receiving surface side supporting member provided at the light receiving surface side of the solar cell;   a back surface side supporting member provided at the back surface side of the solar cell;   
       and
 a sealing material for sealing the solar cell between the light receiving surface side supporting member and the back surface side supporting member; 
 wherein the sealing material includes a first region that is in contact with the light receiving surface of the solar cell and a second region that is in contact with the back surface of the solar cell, with the sealing material of the first region and the sealing material of the second region each being cross-linked; and wherein the degree of cross-linkage of the second region is smaller than the degree of cross linkage of the first region.