As the P-type cell is getting closer to its efficiency limit, PV industry generally turns its attention to the N-type cell with higher efficiency potential. In recent years, the N-type cell has demonstrated its advantages over the P-type cell in efficiency in many fields, especially in the N-type TOPCon (Tunnel Oxide Passivated Contact) cell.
Heraeus has supported this effort for over five years with the development and mass production of our SOL9350, SOL9360, SOL9370 and SOL9380 series pastes. Heraeus continues to innovate through investments in R&D and has developed pastes with greater performance for N-type cells.
The Heraeus SOL9390 is our newest N-type paste for p+ emitter surfaces. In conjunction with our pastes for n+ emitter surfaces, beta test customers have demonstrated higher cell efficiencies with better contact to the cell’s boron emitter.
- Better contact resistivity for high Rsheet
- low metal induced recombination leading to higher VOC
- Improved printability / line uniformity
- Co-fireable with Heraeus n+ surface paste
- Wider firing window
- Higher green strength
- Compatible with Double and Dual printing