Metal paste composition for forming electrode and Silicon solar cell using the same

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PURPOSE : A metal paste composition for forming an electrode is provided to improve electric performance of a solar battery by including materials capable of utilizing electric performance of a solar battery, and to prevent bending of a substrate by controlling plasticity of aluminum.CONSTITUTION : A metal paste composition comprises aluminum powder, glass frit powder, organic binder, rare earth metal as a sintering aid, or a metal oxide thereof. A silicon solar battery comprises a silicon semiconductor substrate; an emitter layer formed on the upper part of the substrate; a reflection preventing layer formed on the emitter; a front electrode which passes through the reflection preventing layer and is connected to the emitter layer; and a rear electrode connected to the rear side of the substrate. The rear electrode is formed by spreading the metal paste composition on the rear side of the substrate and sintering the same.[Reference numerals] (AA) Comparative example 1; (BB) Comparative example 2; (CC) Comparative example 3; (DD) Example 1COPYRIGHT KIPO 2013