Glass powder for N-type silver-aluminum paste and preparation method thereof

Abstract

A glass powder for N-type silver-aluminum paste comprises a lead-containing compound, a silicon-containing compound, a thallium-containing compound and a zinc-containing compound, wherein the compounding of the thallium-containing compound and the lead-containing compound confers good silver melting capability on the glass powder, and the prepared silver-aluminum paste has good wettability to the surface of a solar cell silicon wafer; the silicon-containing compound provides a more complete network structure for the glass powder; and the zinc-containing compound reduces the softening temperature of the glass powder and further reduces the sintering temperature of the prepared N-type silver-aluminum paste; further comprises a compound containing a first main group metal element, and the compound can react with a zinc-containing compound to further reduce the softening temperature of the glass powder, further reduce the sintering temperature of the prepared N-type silver-aluminum paste and improve the preparation yield of the N-type solar cell.

Dependencies are inferred from the claim text.