DuPont™ Solamet®

Superior solar cell efficiency

DuPont’s Solamet® has done more to
increase solar cell efficiencies and power output
than any other provider worldwide, no one else even comes close.

Efficiency Matters

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A Brighter Future

Solamet® metallization pastes transformed thousands of homes in an isolated area of India.  Villagers previously lacked safe, clean, dependable electricity, but our solar solutions provided energy that’s safer, more reliable, more efficient, and cost effective.

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Efficiency for widespread accessibility

The advancements in Solamet® have helped to increase the power output of solar panels by 30%. This means more reliable power with fewer panels and materials and less space. More power with fewer resources means lower overall cost and faster adoption of solar energy worldwide.

Even small efficiency gains can lead to lower overall costs of a PV system over time. Every 1% improvement in sunlight conversion efficiency could result in a 5% reduction in the cost of the overall solar power generation system.
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Versatility for very specific needs

We’ve been on the cutting edge of solar cell efficiency for a long time. We were the first to offer:

·         Co-fire metallizations

·         Frontside chemistry

·         Enable LDE technology

Our solar solutions are simple, cost-effective, and offer higher cell efficiency (double-digit) and greater power output at any scale.

Solamet® photovoltaic metallization pastes have enabled sustainable development of China’s solar energy industry and have brought reliable electricity to rural areas.
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Endurance for long-term reliability

With Solamet® metallization pastes, your solar cells will generate more reliable, efficient, safe, and robust power for 25+ years.

Solamet® Metallization Paste Selector Guide

 

Our guide makes it easy to select the right solar cell materials.

 

DuPont™ Solamet® photovoltaic (PV) metallization pastes are advanced solar cell materials that deliver significantly higher efficiency and greater power output for solar panels.

 

When screen printed onto the surface of solar cells, metallization pastes collect the electricity produced by the cells and transport it out.

 

DuPont has introduced more than 110 new Solamet® PV metallization paste formulations over the last ten years, and continues to develop new Solamet® pastes to boost solar cell efficiencies even more.

 

We invite you to explore our DuPont™ Solamet® PV Metallization Paste Selector Guide and find the Solamet® pastes that are best suited for your application.

 

Photovoltaic metallization pastes are screen printed onto the surface of solar cells in a pattern of grid lines which serve to collect electricity produced by the cell and transport it out. Single print, which refers to the printing of a single layer of silver paste on the front side of a solar cell as a conductor, is the most common screen printing technology. From Solamet® PV145 paste to the latest generation of Solamet® PV22x paste available today, Solamet® photovoltaic metallization pastes continue to set the standard for solar cell efficiency.

To maximize the efficiency of a solar cell, double (or multiple) printing technology reduces the shadowing effect of wide grid lines and improves electrical conductivity. In addition to demanding precise alignment of the patterning system, multiple printing requires the paste to be finely tuned to perform consistently during all printing passes.

N-type solar cells are based on n-type silicon wafers, which are produced differently in the doping process during crystallization. P-type silicon usually employs boron as a dopant, while n-type silicon crystals usually include phosphorus added to the silicon melt. N-type solar cells feature two important advantages: they do not suffer from light-induced degradation (LID) and they are less sensitive to impurities that are usually present in silicon feedstock. The rear passivated N-PERT is with the addition of n+ poly-SiOx. The ultra-thin SiOx and n+ poly-Si processed at rear side as passivated emitter further enhance overall cell efficiency of n-type cells.

Interdigitated back contact solar (IBC) cells are made by screen printing dopant materials onto the back surface of a semiconductor substrate in a pair of interdigitated patterns. Rear contact solar cells eliminate shading losses altogether by putting both contacts on the rear of the cell. Cells with both contacts on the rear are easier to interconnect and can be placed closer together in the module since there is no need for a space between the cells.

Heterojunction cells combine two technologies: an n-type crystalline silicon cell sandwiched between two layers of amorphous “thin film” Si. The two thin-film a-Si layers can absorb extra photons which enhance EFF over n-type cells and add a significant amount of electricity for bifacial design.

Metal wrap through (MWT) is a specialized cell structure that transfers the bus bars on the front side of the solar cell onto the back side, reducing shading on the front side of the cell. The connections are made through holes in the silicon with the same composition as the bus bars.

Front side silver
Solamet® PV22x delivers better contact performance and high aspect ratios via fine line printing that enable cell efficiency enhancement >0.1%.
Rear side tabbing silver
A highly conductive, solderable silver composition providing lower consumption with demonstrated reliability.
Front Side Silver
Solamet® PVD1x and PVD2x make up an integrated two-layer double print or dual print solution. A variety of choices on product design enable improvement on efficiency and cost structure.
Rear Side Tabbing Panel
A highly conductive solderable silver composition providing lower consumption with demonstrated reliability.
Silver/aluminum pastes
Advanced silver/aluminum paste to provide 30-40% better contact resistivity on b-doped emitters.
New generation silver/aluminum for high efficiency for n-PERT cells. EFF benefit is over 0.1% with the use of back side Ag PV6N1.
Rear side silver
This formulation provides EFF benefit over 0.1% with the use of front side Ag paste, PV3N3.
Designed for multiple printing and to enable narrower and taller grid lines to be precisely printed in two or more layers.
Contacting silver
Designed for both p-type and n-type with a single screen-printing process. Unique formulation provides excellent reliability performance.
Front/back side silver
Polymer thick film Ag composition for FS grid applications on transparent conductive oxides with low Rgl and low Rc.
Low temperature curable paste which offers excellent electrical properties, fine line printability with minimal flow-out on TCOs.
Connecting silver paste
The newest Solamet® via fill paste with good via filling capability and connection with front and rear side interconnects.

What makes up a solar panel?

An interactive guide

Photo:  TSEC V Series Launch

“DuPont continues to deliver technology advancements that enable module manufacturers to improve their product offerings. We have come to count on the ability of DuPont to constantly push the boundaries of photovoltaic materials that enable solar products to be more efficient, reliable and offer a higher return on investment.” 

-  C.J. Hung, president of Taiwan Solar Energy Company

Peter Dorhout, ACS

“DuPont™ Solamet® technology plays a central role in making solar panels more powerful and more cost-effective. The technology is fostering a fast-growing industry that is creating jobs while enabling sustainable living for humankind. This is a strong example of chemistry having a direct, positive impact on society, which is why these inventors are clearly ‘Heroes of Chemistry.’” 

- Peter Dorhout, ACS President