LAUSR

In this study, a new Ag-Te doped glass frits were used to prepare silver pastes in order to improve the electrical properties of silicon solar cells. A set of silver pastes was formulated to investigate the effect of the doping proportion on the electrical properties of the silicon solar cells. The silver paste with 5wt% dopant increased the photovoltaic conversion efficiency of silicon solar cells by 0.199% compared to the increase achieved using the paste without the dopant. This effect could be attributed to the addition of dopant, which increased the size and number of Ag crystallites on the silicon wafer. The size and number of Ag crystallites were the major factors controlling the contact resistance between the silver electrode and the silicon wafer, and series resistance of solar cells. When the dopant proportion reached 10wt% or 15wt%, the p-n junction broke due to the oversized Ag crystallites embedded in the p-n junction. Thus, the leakage current was observed, and this current degraded the electrical properties of the silicon solar cells. Therefore, the proper proportion of Ag-Te doped glass frits was necessary to obtain the optimal the silicon solar cells.