Method for manufacturing single crystal silicon solar cell and single crystal silicon solar cell

Abstract

A single crystal silicon solar cell including a stack having at least a light-reflecting film, a single crystal silicon layer, a transparent adhesive layer, and a transparent insulator substrate; a plurality of areas of a first conductivity type and a plurality of areas of a second conductivity type formed in a surface of the silicon layer near the light-reflecting film; a plurality of pn junctions formed in a plane direction of the silicon layer; a plurality of first individual electrodes, each being formed on each one of the plurality of areas of the first conductivity type, and a plurality of second individual electrodes, each being formed on each one of the plurality of areas of the second conductivity type; and a first collector electrode for connecting the plurality of first individual electrodes and a second collector electrode for connecting the plurality of second individual electrodes.

1 . A single crystal silicon solar cell, comprising:
 a stack having at least a light-reflecting film, a single crystal silicon layer, a transparent adhesive layer, and a transparent insulator substrate;   a plurality of areas of a first conductivity type and a plurality of areas of a second conductivity type formed in a surface of the single crystal silicon layer near the light-reflecting film;   a plurality of pn junctions formed at least in a plane direction of the single crystal silicon layer;   a plurality of first individual electrodes, each being formed on each one of the plurality of areas of the first conductivity type in the single crystal silicon layer, and a plurality of second individual electrodes, each being formed on each one of the plurality of areas of the second conductivity type in the single crystal silicon layer; and   a first collector electrode for connecting the plurality of first individual electrodes and a second collector electrode for connecting the plurality of second individual electrodes.   
     
     
         2 . The single crystal silicon solar cell according to  claim 1 , wherein the transparent insulator substrate is composed of any of quartz glass, crystallized glass, borosilicate glass, and soda-lime glass. 
     
     
         3 . The single crystal silicon solar cell according to  claim 1 , wherein the transparent adhesive layer contains at least one resin selected from the group consisting of silicone resin, acrylic resin, cycloaliphatic acrylic resin, liquid crystal polymer, polycarbonate, and polyethylene terephthalate. 
     
     
         4 . The single crystal silicon solar cell according to  claim 2 , wherein the transparent adhesive layer contains at least one resin selected from the group consisting of silicone resin, acrylic resin, cycloaliphatic acrylic resin, liquid crystal polymer, polycarbonate, and polyethylene terephthalate. 
     
     
         5 . The single crystal silicon solar cell according to  claim 1 , wherein the thickness of the single crystal silicon layer is not less than 2 μm and not more than 50 μm. 
     
     
         6 . The single crystal silicon solar cell according to  claim 4 , wherein the thickness of the single crystal silicon layer is not less than 2 μm and not more than 50 μm. 
     
     
         7 . The single crystal silicon solar cell according to  claim 1 , wherein an interior of the transparent insulator substrate or a surface of the transparent insulator substrate opposite to a surface near the single crystal silicon layer is capable of scattering light. 
     
     
         8 . The single crystal silicon solar cell according to  claim 6 , wherein an interior of the transparent insulator substrate or a surface of the transparent insulator substrate opposite to a surface near the single crystal silicon layer is capable of scattering light. 
     
     
         9 . The single crystal silicon solar cell according to  claim 1 , wherein the surface of the transparent insulator substrate near the single crystal silicon layer is capable of scattering light. 
     
     
         10 . The single crystal silicon solar cell according to  claim 8 , wherein the surface of the transparent insulator substrate near the single crystal silicon layer is capable of scattering light. 
     
     
         11 . The single crystal silicon solar cell according to  claim 1 , wherein the transparent adhesive layer is capable of scattering light. 
     
     
         12 . The single crystal silicon solar cell according to  claim 10 , wherein the transparent adhesive layer is capable of scattering light.