Patent ID: 8188365

Claim:
A solar cell, comprising: a semiconductor substrate having a first conductive type; an emitter layer formed on the semiconductor substrate, wherein the emitter layer includes a second conductive type material that is opposite to the first conductive type; an antireflective layer formed on the emitter layer; a front electrode passing through the antireflective layer and contacting the emitter layer electrically; and a rear electrode formed on a rear surface of the semiconductor substrate, wherein a sheet resistance of the emitter layer is 60 to 120 a/square, wherein an impurity concentration of the second conductive type material of the emitter layer is 1×10 16 to 1×10 21 atoms/cm 3 , and wherein the front electrode comprises at least a glass frit, silver (Ag), zinc (Zn), and bismuth (Bi), and the bismuth (Bi) is more than the zinc (Zn) based on wt %.