NOVELTY - A solar cell comprises a contact containing a paste (140), where the paste comprises, prior to firing, a) at least one silver powders, b) a first glass frit having a first softening temperature of 250-650 degrees C, and a particle size of 0.2-20 microns, c) a second glass frit having a second softening temperature of 300-700 degrees C, and a particle size of 0.2-20 microns, such that the first and second softening temperatures differ by at least 10 degrees C.    USE - As solar cell (claimed) for converting sunlight into electrical energy.    ADVANTAGE - The solar cell exhibits solar cell efficiency with a potential of higher than 23%. The paste achieve a very low contact resistance to p-type emitter on n-type base silicon solar cells; also fire-through the passivation layer to make contact to the p-type emitter; and maintain low bulk resistivity, with no shunting or junction leakage issues even though an aluminum component is present. The low contact resistance and bulk resistivity play important roles in decreasing series resistance in a solar cell contacts made with the pastes, which help improve efficiency through increasing the fill factor.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) an n-type Si solar cell with p-type emitter comprising an n-type silicon wafer bearing on the p-side a paste (P1) comprising, prior to firing, i) a first silver powder (40-60 wt.%) having a D50 average particle size of 0.5-1.7 microns, ii) a second silver powder (25-45 wt.%) having a D50 average particle size of 1.75-5 microns, iii) a trivalent metallic dopant (0.01-6 wt.%) having a D50 particle size of 0.5-10 microns, iv) a first glass composition (1-5 wt.%) having a softening point of 250-650 degrees C, v) a second glass composition (1-5 wt.%) having a softening point of 300-700 degrees C, where the softening points of the first and second glass compositions differ by at least 10 degrees C, and vi) a quantity of an organic vehicle such that, together with the silver and aluminum powders and glass compositions, totals 100 wt.%;    (2) a metal wrap through solar cell comprising: an n-type silicon wafer having at least one hole perforated in it; a p-type emitter layer disposed over at least a portion of at least one side of the wafer; a phosphorus diffusion layer, as n-islands, disposed on the n-side of the wafer; passivation layers disposed over both sides; a silver paste disposed over the passivation layer on the back side n-islands; a silver paste disposed in at least one hole in the silicon wafer; and a contact comprising the paste (P1) being used to contact the p-type emitter; and    (3) an emitter wrap through solar cell comprising: a p-type silicon wafer having at least one hole perforated in it; a n-type emitter layer disposed over at least a portion of at least one side of the wafer; several localized p-type islands disposed on the back side of the wafer; passivation layers disposed over both sides; p-contact paste (P1) disposed over the localized p-type islands on back; and n-contact silver plug paste applied into the hole in the silicon wafer, the silver plug paste also contacting n-island.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a bifacial n-type solar cell with front p-type emitter.    p-Type layer (120)    Silicon nitride film (130)    Paste (140)    Passivation layer (150)    Front side silver-aluminum paste (160)    Backside silver paste (170)