| 摘要 |
PURPOSE: A glass composition, glass frit based on the glass composition, aluminum paste for a solar cell rear electrode including the glass frit are provided to obtain the glass frit with low coefficient of thermal expansion using the optimal composition ratio of glass components. CONSTITUTION: A glass composition includes 5 to 20 mol% of PbO, 0.01 to 4 mol% of Al_2O_3, 20 to 40 mol% of B_2O_3, 45 to 60 mol% of ZnO, 0.01 to 4 mol% of P_2O_5, and 0.01 to 4 mol% of Li_2O. Glass frit is obtained based on the glass composition. Aluminum paste for a solar cell rear electrode including the glass frit includes 65 to 75 weight% of aluminum powder, 0.01 to 5 weight% of glass frit, and 20 to 34.90 weight% of an organic vehicle solution.
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