DuPont Microcircuit Materials (MCM) offers a comprehensive system of Solamet® photovoltaic (PV) metallizations used in the construction of c-Si solar cells. Solamet® offers advantages in efficiency and processing, enabling more advanced and efficient solar cells. The material properties and functional requirements of the front and back sides of PV wafers dictate significant differences in the functionality of photovoltaic metallizations.
Solamet® photovoltaic metallizations designed specifically for c-Si applications include:
Front Side n-type Silver (Ag) Metallizations
The front side conductor is responsible for absorbing light and generating most of the electrical carriers.
- Low contact resistance
- High conductivity
- Fine line resolution
- High soldered adhesion
Back Side p-type Aluminum (Al) Metallizations
The function of the back-side conductor is to act as a second electrode in the cell.
- Utilization of the back-surface field effect
- Efficient use of aluminum
- Low stress (bow)
Back Side p-type Silver (Ag) Metallizations
The function of the back-side silver or silver-aluminum conductor is to act as the interconnect part of the second electrode in the solar cell.
- Strong ohmic contact
- Solderable or weldable
- High paste coverage
- High soldered aged adhesion