TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The glass frit further comprises (wt.%): aluminum oxide (0.1-5); magnesium oxide (0.1-0.2); and titanium oxide (0.1-5). The glass frit comprises less than 5 wt.% of at least one selected from strontium oxide, barium oxide, or zirconium oxide; or 0.1-5 wt.% of at least one selected from silver oxide and calcium oxide. The paste composition comprises (wt.%): glass frit (1-10), conductive powder (60-90), organic vehicle (10-20), and dispersing agent (1-10).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The solvent includes at least one selected from butylcarbitolacetate, butylcarbitol, butylcellosolve, butylcellosolveacetate, propyleneglycolmonomethylether, dipropyleneglycolmonomethylether, propyleneglycolmonomethylpropionate, ethyletherpropionate, terpineol, propyleneglycolmonomethyletheracetate, dimethylamino formaldehyde, methylethylketone, gamma -butyrolactone, ethyllactate, or texanol.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The organic vehicle includes solvent and organic binder. The organic binder includes at least one selected from acrylate resin, ethyl cellulose, nitro cellulose, polymer of ethyl cellulose and phenol resin, wood rosin, or polymethacrylate of alcohol. EXAMPLE - Lead oxide (77.9 wt.%), silicon dioxide (11.6 wt.%), boron oxide (7.6 wt.%), aluminum oxide (0.4 wt.%), zinc oxide (1.2 wt.%), iron oxide (0.4 wt.%), chromium oxide (0.4 wt.%), cobalt oxide (0.1 wt.%), and manganese oxide (0.4 wt.%) were mixed with each other by using ball mill and dried at 80 degrees C. Then, the mixture was melted at 1000 degrees C, and quenched at normal temperature. The result was coarsely pulverized by using disk mill, and finely pulverized by using planetary mill. The obtained glass frit had mean grain size of 3 mu m. The paste composition comprising (wt.%): glass frit (5), silver powder (75), and organic vehicle (20), was prepared. After forming front electrode on single silicon wafer cell using the paste composition, five-time tests were performed. The cell exhibited efficiency of 17.12%.