Solar cell and solar cell module

Abstract

A solar cell and a solar cell module are disclosed. The solar cell includes a substrate of a first conductive type, a plurality of emitter layers of a second conductive type opposite the first conductive type, a plurality of first conductive members partially connected to the substrate, and a plurality of second conductive members partially connected to each of the plurality of emitter layers.

1 . A solar cell, comprising:
 a substrate of a first conductive type;   a plurality of emitter layers of a second conductive type opposite the first conductive type;   a plurality of first conductive members partially connected to the substrate; and   a plurality of second conductive members partially connected to each of the plurality of emitter layers.   
     
     
         2 . The solar cell of  claim 1 , wherein a first conductive member being an outermost one of the plurality of first conductive members and a second conductive member being an outermost one of the plurality of second conductive members are positioned on the same line. 
     
     
         3 . The solar cell of  claim 1 , wherein each of the plurality of first conductive members and each of the plurality of second conductive members have a ball shape. 
     
     
         4 . The solar cell of  claim 1 , wherein the plurality of emitter layers are positioned in a surface of the substrate on which light is not incident. 
     
     
         5 . The solar cell of  claim 4 , further comprising a passivation layer positioned on the plurality of emitter layers. 
     
     
         6 . The solar cell of  claim 5 , wherein the passivation layer comprises a plurality of first openings exposing portions of each of the plurality of emitter layers, and
 the plurality of second conductive members are positioned in the plurality of first openings and are connected to the exposed portions of each of the plurality of emitter layers exposed through the plurality of first openings.   
     
     
         7 . The solar cell of  claim 6 , further comprising a plurality of surface field layers that are positioned in the surface of the substrate, on which light is not incident, to be spaced apart from the plurality of emitter layers. 
     
     
         8 . The solar cell of  claim 7 , wherein the plurality of emitter layers and the plurality of surface field layers extend in the same direction in the surface of the substrate on which light is not incident. 
     
     
         9 . The solar cell of  claim 8 , wherein ends of the plurality of emitter layers and ends of the plurality of surface field layers are positioned on the same line. 
     
     
         10 . The solar cell of  claim 7 , wherein the passivation layer further comprises a plurality of second openings exposing portions of each of the plurality of surface field layers, and
 the plurality of first conductive members are positioned in the plurality of second openings and are connected to the exposed portions of each of the plurality of surface field layers exposed through the plurality of second openings.   
     
     
         11 . The solar cell of  claim 10 , further comprising a plurality of first electrodes, that are positioned in the plurality of first openings and are positioned between each of the plurality of emitter layers and the plurality of second conductive members, and a plurality of second electrodes, that are positioned in the plurality of second openings and are positioned between each of the plurality of surface field layers and the plurality of first conductive members. 
     
     
         12 . The solar cell of  claim 11 , wherein a first electrode being an outermost one of the plurality of first electrodes and a second electrode being an outermost one of the plurality of second electrodes are positioned on the same line. 
     
     
         13 . The solar cell of  claim 11 , wherein each of the plurality of first electrodes and each of the plurality of second electrodes contain silver (Ag). 
     
     
         14 . The solar cell of  claim 13 , wherein each of the plurality of first electrodes and each of the plurality of second electrodes further contain at least one selected from the group consisting of nickel (Ni), copper (Cu), aluminum (Al), tin (Sn), zinc (Zn), indium (In), titanium (Ti), gold (Au), and a combination thereof. 
     
     
         15 . The solar cell of  claim 11 , wherein the plurality of first electrodes and the plurality of second electrodes are formed using at least one of a deposition method, a printing method, an electroplating method, and an electroless plating method. 
     
     
         16 . The solar cell of  claim 10 , wherein each of the plurality of first openings and each of the plurality of second openings have a rectangle shape. 
     
     
         17 . The solar cell of  claim 1 , further comprising a surface field layer of the first conductive type positioned in a surface of the substrate on which light is incident. 
     
     
         18 . The solar cell of  claim 1 , wherein each of the plurality of first conductive members and each of the plurality of second conductive members are formed of SnPb-based material or Pb-free material. 
     
     
         19 . The solar cell of  claim 1 , wherein the plurality of first conductive members and the plurality of second conductive members are formed using a deposition method or an electroplating method. 
     
     
         20 . The solar cell of  claim 1 , further comprising a plurality of first electrodes positioned between the plurality of first conductive members and the substrate and a plurality of second electrodes positioned between the plurality of second conductive members and each of the plurality of emitter layers. 
     
     
         21 . The solar cell of  claim 20 , wherein the plurality of first electrodes and the plurality of first conductive members are positioned in the same direction as the plurality of second electrodes and the plurality of second conductive members. 
     
     
         22 . A solar cell module, comprising:
 a plurality of solar cells each having a plurality of surface field layers positioned in a substrate, a plurality of emitter layers positioned in the substrate, a plurality of first conductive members partially connected to each of the plurality of surface field layers, and a plurality of second conductive members partially connected to each of the plurality of emitter layers;   first and second protective layers that are positioned on opposite sides of the plurality of solar cells and protect the plurality of solar cells;   a transparent member positioned on the first protective layer; and   a back sheet underlying the second protective layer, the back sheet having a first electrode pattern part, that contacts the plurality of first conductive members of each of the plurality of solar cells to electrically connect the plurality of first conductive members to one another, and a second electrode pattern part that contacts the plurality of second conductive members of each of the plurality of solar cells to electrically connect the plurality of second conductive members to one another.   
     
     
         23 . The solar cell module of  claim 22 , wherein the second protective layer comprises a plurality of first openings exposing the plurality of first conductive members of the plurality of solar cells and a plurality of second openings exposing the plurality of second conductive members of the plurality of solar cells, and
 the plurality of first conductive members contact the first electrode pattern part through the plurality of first openings, and the plurality of second conductive members contact the second electrode pattern part through the plurality of second openings.   
     
     
         24 . The solar cell module of  claim 22 , wherein the first electrode pattern part and the second electrode pattern part are positioned adjacent to each other and are connected to each other.