Solar cell

Abstract

A solar cell includes a photoelectric conversion layer; and a front electrode on the photoelectric conversion layer, wherein the front electrode includes a plurality of first finger electrodes; a plurality of second finger electrodes; a bus electrode directly connected to at least one of the plurality of first finger electrodes; a plurality of connecting electrodes connected to the plurality of second finger electrodes, the plurality of connecting electrodes forming at least one space therebetween; and an auxiliary electrode formed at the at least one space, wherein the auxiliary electrode connects at least two connecting electrodes of the plurality of connecting electrodes.

1 . (canceled) 
     
     
         2 . A solar cell comprising:
 a photoelectric conversion layer; and   a front electrode that is disposed on the photoelectric conversion layer, and that comprises:
 a bus bar electrode that extends along a first direction; 
 a plurality of connecting electrodes that extend along the first direction, that are connected to the bus bar electrode, and that extend away from the bus bar electrode along the first direction; 
 at least one first finger electrode that is connected to the bus bar electrode, and that extends away from the bus bar electrode along a second direction and along a third direction opposite to the second direction; and 
 at least one second finger electrode that is connected to at least one of the plurality of connecting electrodes, and that extends away from the plurality of connecting electrodes along the second direction and along the third direction opposite to the second direction. 
   
     
     
         3 . The solar cell according to  claim 2 , wherein each connecting electrode among the plurality of connecting electrodes comprises (i) a first end and (ii) a second end that is opposite the first end,
 wherein the first end of the connecting electrode is connected to an end portion of the bus bar electrode, and   wherein the second end of the connecting electrode is spaced apart from the bus bar electrode such that the connecting electrode extends along the first direction, away from the bus bar electrode, to the second end of the connecting electrode.   
     
     
         4 . The solar cell according to  claim 2 , wherein the plurality of connecting electrodes are parallel to the bus bar electrode and are perpendicular to at least one of (i) the at least one first finger electrode, or (ii) the at least one second finger electrode. 
     
     
         5 . The solar cell according to  claim 4 , wherein the plurality of connecting electrodes are parallel to each other, and
 wherein at least two connecting electrodes among the plurality of connecting electrodes are symmetrically arranged about a longitudinal axis of the bus bar electrode.   
     
     
         6 . The solar cell according to  claim 2 , wherein the plurality of connecting electrodes define at least one space therebetween. 
     
     
         7 . The solar cell according to  claim 6 , wherein the at least one second finger electrode is arranged outside of the at least one space between the plurality of connecting electrodes. 
     
     
         8 . The solar cell according to  claim 6 , further comprising at least one auxiliary electrode that is arranged in the at least one space between the plurality of connecting electrodes, and that is connected to at least two connecting electrodes among the plurality of connecting electrodes. 
     
     
         9 . The solar cell according to  claim 8 , wherein the at least one auxiliary electrode is arranged parallel to the at least one second finger electrode. 
     
     
         10 . The solar cell according to  claim 9 , wherein one of the at least one auxiliary electrode is arranged collinear with one of the at least one second finger electrode. 
     
     
         11 . The solar cell according to  claim 8 , wherein the at least one space between the plurality of connecting electrodes comprises an enclosed space that is defined by (i) two connecting electrodes among the plurality of connecting electrodes, (ii) one of the at least one auxiliary electrode, and (iii) an end portion of the bus bar electrode. 
     
     
         12 . The solar cell according to  claim 8 , wherein the at least one space between the plurality of connecting electrodes comprises an enclosed space that is defined by (i) two connecting electrodes among the plurality of connecting electrodes, and (ii) two auxiliary electrodes among the at least one auxiliary electrode. 
     
     
         13 . The solar cell according to  claim 2 , wherein the at least one second finger electrode and the plurality of connecting electrodes are arranged closer to an edge of the photoelectric conversion layer as compared to the bus bar electrode and the at least one first finger electrode. 
     
     
         14 . The solar cell according to  claim 2 , wherein the at least one second finger electrode and the plurality of connecting electrodes are arranged further towards the first direction as compared to the bus bar electrode and the at least one first finger electrode. 
     
     
         15 . The solar cell according to  claim 2 , wherein for each second finger electrode of the at least one second finger electrode:
 the second finger electrode is connected to an outermost connecting electrode among the plurality of connecting electrodes, and   the second finger electrode extends away from the plurality of connecting electrodes along the second direction or along the third direction opposite to the second direction.   
     
     
         16 . The solar cell according to  claim 2 , wherein for each second finger electrode of the at least one second finger electrode:
 a first portion of the second finger electrode is connected to the at least one of the plurality of connecting electrodes, and extends away from the plurality of connecting electrodes along a fourth direction; and   a second portion of the second finger electrode extends away from the first portion and away from the plurality of connecting electrodes along the second direction or along the third direction opposite to the second direction.   
     
     
         17 . The solar cell according to  claim 2 , wherein a width of each of the plurality of connecting electrodes is smaller than a width of the bus bar electrode. 
     
     
         18 . A solar cell module comprising:
 a plurality of solar cells, with each of the plurality of solar cells comprising (i) a photoelectric conversion layer and (ii) an electrode that is disposed on the photoelectric conversion layer;   a plurality of interconnectors that are configured to electrically interconnect electrodes of the plurality of solar cells, wherein each of the plurality of interconnectors is configured to electrically interconnect electrodes of adjacent solar cells;   at least one sealing film that is configured to seal the plurality of solar cells;   a front substrate that is disposed on front surfaces of the plurality of solar cells; and   a rear substrate that is disposed on rear surfaces of the plurality of solar cells,   wherein for each of the plurality of solar cells, the electrode comprises:
 a bus bar electrode that extends along a first direction; 
 a plurality of connecting electrodes that extend along the first direction, that are connected to the bus bar electrode, and that extend away from the bus bar electrode along the first direction; 
 at least one first finger electrode that is connected to the bus bar electrode, and that extends away from the bus bar electrode along a second direction and along a third direction opposite to the second direction; and 
 at least one second finger electrode that is connected to at least one of the plurality of connecting electrodes, and that extends away from the plurality of connecting electrodes along the second direction and along the third direction opposite to the second direction. 
   
     
     
         19 . The solar cell module according to  claim 18 , wherein a first end of the bus bar electrode is connected to the plurality of connecting electrodes, and
 wherein a second end of the bus bar electrode is connected to an interconnector among the plurality of interconnectors.   
     
     
         20 . The solar cell module according to  claim 18 , wherein the plurality of connecting electrodes define at least one space therebetween, and
 wherein at least one auxiliary electrode is arranged in the at least one space between the plurality of connecting electrodes, and is connected to at least two connecting electrodes among the plurality of connecting electrodes.   
     
     
         21 . The solar cell module according to  claim 18 , wherein a width of each of the plurality of connecting electrodes is smaller than a width of the bus bar electrode.