TOPCon Front Side Busbar Silver Paste  TZ

TZ is a high-efficiency conductive busbar silver paste specially designed for the boron emitter of TOPCon(tunnel oxide passivated contact) solar cells. It is used for front and back step busbar printing and has a unique non-burn-through glass design.

This product can provide excellent solderability and solder resistance to meet different interconnection processes.

 

Benefits

  • Unique rheological properties meet printing requirements, the surface of the silver layer is smooth and flat, high tensile force, and wide welding window.
  • low unit consumption, good conductivity, suitable for long-term printing, can effectively improve the conversion efficiency of the solar cells.

Typical Drying Conditions

  • Chain fast burning furnace: 100℃-350℃/5-50sec;
  • Rotating drying furnace: 100℃-350℃/5-10min

The drying time shall be adjusted according to the drying status and shall not be too long

Test Properties
Solid Content (%) 80-90
Viscosity (Pa.S) (Brookfield,14# 50r/s, 25±0.5℃) 50-150
Fineness(μm) ≤10
Resistivity ≤ 5 μΩ.cm
Pulling Strength ≥ 1.5 N
Screen Mesh 280-520
Unit Consumption(g/pc, 182mm wafer) ≤ 0.04
Drying Temperature 100-350℃
Firing Temperature Peak Temperature 700-800℃
Surface No false prints, no defects, smooth surface, etc., no bad appearance
EL Test No blackening
Shelf Life Six Months from Date of Shipment