Solar Cell Module and Photovoltaic Power Generator Using This

Abstract

A surface electrode ( 5 ) is installed on the light receiving surface of a solar cell element, the surface electrode ( 5 ) comprises three bus bar electrodes ( 5 a ) for extracting light-produced at the solar cell element to the outside and collecting finger electrodes ( 5 b ) connected to these bus bar electrodes ( 5 a ), and the bus bar electrodes ( 5 a ) are not less than 0.5 mm and not more than 2 mm in width and the finger electrodes ( 5 b ) are not less than 0.05 mm and not more than 0.1 mm in width. A high-efficient solar cell module can be obtained with substantially lowered resistance by increasing the number of bus bar electrode ( 5 a ) and thereby decreasing the lengths of the finger electrodes ( 5 b ).

1 - 20 . (canceled) 
     
     
         21 . A solar cell module comprising a plurality of solar cell elements having a plate shape, and arranged between a translucent panel and a back surface protective member such that the solar cell elements are electrically connected to each other by innerleads and spaces between these are filled with a filler member,
 wherein the plurality of solar cell elements each comprises:
 a semiconductor substrate; 
 light-receiving surface electrodes on a light receiving surface side of the semiconductor substrate comprising:
 three front surface bus bar electrodes for providing output; and 
 front surface finger electrodes perpendicular to the front surface bus bar electrodes; and 
 
 three back surface bus bar electrodes for providing output on a non-light receiving surface side of the semiconductor substrate, 
   wherein, in the plurality of solar cell elements, each of the three front surface bus bar electrodes of one solar cell element is connected by the innerleads to each of the three back surface bus bar electrodes of another solar cell element,   wherein the front surface bus bar electrodes have widths of not less than 0.5 mm and not more than 2 mm, and the front surface finger electrodes have widths of not less than 0.05 mm and not more than 0.1 mm,   wherein each of the back surface bus bar electrodes is arranged to be directly below each of the front surface bus bar electrodes with respect to the semiconductor substrate therebetween,   wherein one of the three front surface bus bar electrodes is disposed on a center line of the semiconductor substrate, and   wherein neighboring front surface bus bar electrodes are electrically connected to each other via the front surface finger electrodes.   
     
     
         22 . The solar cell module according to  claim 21 , wherein the front surface finger electrodes are directly connected to the filler member without having solder therebetween. 
     
     
         23 . The solar cell module according to  claim 21 , wherein the front surface finger electrodes each have widths of not less than 0.06 mm and not more than 0.09 mm. 
     
     
         24 . The solar cell module according to  claim 21 , wherein an opposite conductivity-type diffusion layer having a sheet resistance of not less than 60 Ω/square and not more than 300 Ω/square is formed on a light-receiving surface of each of the solar cell elements.