Method of manufacturing solar cell electrode and conductive paste

1. A method of manufacturing a solar cell electrode comprising steps of:

preparing a semiconductor substrate having a preformed electrode on a front side, a back side, or both of the front and the back side of the semiconductor substrate;

applying a conductive paste onto the preformed electrode, wherein the conductive paste comprises a conductive powder, an amorphous saturated polyester resin with glass transitional temperature (Tg) of 50° C. or lower, and an organic solvent;

drying the applied conductive paste;

putting a tab electrode on the dried conductive paste; and

soldering the tab electrode.

2. The method of manufacturing a solar cell electrode of claim 1 , wherein the conductive powder is from 40 to 90 weight percent, the amorphous saturated polyester resin is from 3 to 20 weight percent, and the organic solvent is 5 to 50 weight percent, based on the total weight of the conductive paste.

3. The method of manufacturing a solar ell electrode of claim 1 , wherein the preformed electrode is a transparent electrode.

4. The method of manufacturing a solar cell electrode of claim 1 , wherein the preformed electrode is a collective electrode comprising a bus bar and a finger line at the front side of the semiconductor substrate.

5. The method of manufacturing a solar cell electrode of claim 1 , wherein the preformed electrode is a backside electrode on the back side of the semiconductor substrate.

6. The method of manufacturing a solar cell electrode of claim 1 , wherein the conductive paste is dried at from 80 to 250° C. at the drying step.

7. A conductive paste of manufacturing a solar cell electrode, comprising, based on the total weight of the conductive paste;

40 to 90 weight percent of a conductive powder;

5 to 50 weight percent of a solvent; and

3 to 20 weight percent of an amorphous saturated polyester resin with Tg of 50° C. or lower.