Patent ID: 8236598

Claim:
A method of making a solar cell contact including a contact layer and a bulk layer, the method comprising: a. ink-jet printing, onto a silicon wafer, at least a portion of which bears an antireflective coating, a first conductive ink layer having a solids loading of about 20 wt % to about 80 wt %, the ink comprising silver and phosphorus, wherein the phosphorus is present as a coating on silver, and glass frit having an average particle size of less than about 3 microns and a glass transition temperature of about 200° C. to about 700° C., wherein the phosphorus composition comprises an organophosphorus compound selected from the group consisting of: [R 1 —O] 3 —P; [Ar 1 —O] 3 —P; [R 2 —Ar 2 —O] 3 —P; [R 3 —Ar 3 —O] 3 —P; P—[(R 4 —O) x (Ar 4 —O) y (R 5 —Ar 5 —O) 3−(x+y) ]; [(R 6 O) 2 —P—Ar 6 ] 2 ; [(Ar 7 O) 2 —P—Ar 7 ] 2 ; and [(R 7 O) 2 —P—R 8 ] 2 , wherein R 1 to R 8 are each independently selected from the group consisting of C 1 -C 10 alkyl and substituted alkyl groups, and Ar 1 to Ar 10 are each independently selected from the group consisting of phenyl and substituted phenyl groups and b. firing the wafer, wherein the glass frit fuses to form a glass and forms a contact layer to silicon.