TOPCon Back Side Finger Silver Paste TX-B
TX-B is a high-efficiency conductive backside fine-gate silver paste specially designed for the poly layer of TOPCon(tunnel oxide passivated contact) solar cells.
It is suitable for poly technologies with different doping concentrations and thicknesses, and has good contact, low metal included recombination, and with high conversion efficiency.
Benefits
- Unique rheological properties enables high-speed printing, with regular and full lines, narrow line width and large aspect ratio
- Low unit consumption and pure color, suitable for different back side polishing processes and can effectively improve the conversion efficiency of the solar cells
Recommended Drying Condition
Chain fast burning furnace: 100℃-350℃/5-50sec;
Rotating drying furnace: 100℃-350℃/5-10min
The drying time can be adjusted according to the drying status, but should not be too long.
| Test | Properties |
|---|---|
| Solid Content (%) | 83-93 |
| Viscosity(Brookfield DV1 SC4-14# 50r/s, 25±0.1℃) | 50-150 |
| Fineness of Grind (μm) | ≤10 |
| Resistivity(μΩ.cm) | ≤5 |
| Screen Mesh (BOPP Stainless steel) | 280-520 |
| Drying Temperature | 100-350℃ |
| Peak Temperature | 700-800℃ |
| Unit Consumption (g/pc, 182mm wafer) | ≤0.05 |
| Surface | No false printing, no broken grids, regular and full lines, no bad appearance |
| EL Test | No blackening |
| Shelf Life | Six Months from Date of Shipment |
