Silicon solar cell module using conductive npaste as electrode and method for manufacturing same

Abstract

The present invention relates to a silicon solar cell module comprising electrodes formed from conductive paste. In the invention, front electrode finger lines and front electrode bus bars are separately formed. The front electrode finger lines are formed by printing a silver paste and calcining the printed silver paste at high temperature, and rear electrode bus bars and front electrode bus bars are formed from an inexpensive lower-temperature conductive paste including a buffer and a curing agent having reducing power, whereby the expensive silver paste is replaced with the inexpensive low-temperature conductive paste, thereby reducing the production cost. Because the front electrode bus bars formed from the conductive paste do not come into contact with the silicon substrate, the area of contact between the silicon substrate and the front electrode is reduced, and thus the decrease in electric current caused by the recombination of electrons and holes resulting from this contact is inhibited, thereby increasing the photovoltaic conversion efficiency of the cell. Also, when the conductive paste is used, the rear electrode and front electrode bus bars are calcined at low temperature, and thus the occurrence of cracks in the silicon substrate is reduced, thereby preventing a decrease in the photovoltaic conversion efficiency of the silicon solar cell and increasing the yield of the cell.