Product Briefing Outline: DuPont Microcircuit Materials (MCM) has introduced its newest generation of frontside metallization pastes for crystalline silicon solar cells – DuPont ‘Solamet’ PV16x series photovoltaic metallizations. This advanced series is claimed to outperform previous generation products by delivering up to 0.4% greater conversion efficiency for solar cells. PV16x series photovoltaic metallizations are also suitable for a wide range of printing line widths and processes, which help to meet a variety of photovoltaic market needs.
Problem: The front side conductor is responsible for absorbing light and generating most of the electrical carriers. Smaller line widths can boost cell efficiency as more surface contact area is available. However, low contact resistance is required as well as high conductivity, especially on large substrate sizes, requiring quality products to achieve desired results. The material properties and functional requirements of the front and back sides of PV wafers dictate significant differences in the functionality of photovoltaic metallizations.
Solution: DuPont Solamet PV16x series photovoltaic metallization pastes can provide up to 0.4% greater efficiency, and features low-contact resistance. The enhancements are achieved through advanced chemistry which provides lower contact resistance to the Si as well as through reduced bulk resistivity of the paste which yields higher gridline conductivity. They are available in a range of options suitable for various printing requirements, including fine lines (less than 80µm) with high aspect ratio patterning, improving line conductance. They are capable of contacting shallow emitters of up to 85 ohms/sq and deep emitters as well. Solamet PV16x photovoltaic metallization pastes have undergone extensive customer testing.
Applications: c-Si solar cell metallization.
Platform: DuPont Solamet photovoltaic metallizations are part of a broad and growing portfolio of products represented by DuPont Photovoltaic Solutions (DPVS).
Availability: June 2010.