Imec, Meco present high efficiency and cost-effective copper technology for i-PERC-type Silicon Solar Cells

September 30, 2013
New large area cells (156x156mm2) achieve 20.5% average efficiency using Nickel/Copper plating on p-type Czochralski Silicon (Cz-Si) material.

At this week's European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC in Paris), imec, a nanoelectronics research center based in Belgium, and Meco, a supplier of plating equipment for semiconductor and solar industry, present large area (156x156 mm2) i-PERC-type silicon solar cells with industry-applicable Nickel/Copper (Ni/Cu) plating for the front contacts. Together, the companies achieved an excellent average efficiency of 20.5% on more than 100 cells, and a maximum efficiency of 20.7% (confirmed by ISE callab).

"Not only do these results show a considerable performance improvement compared to state-of-the-art screen-printed PERC cells, but our Cost-of-Ownership analysis also indicates a clear advantage on the financial level," stated Jozef Szlufcik, Department director silicon photovoltaics at imec. "Our results show that Ni/Cu plating is one of the few new technologies that can simultaneously improve the of PERC , while reducing processing cost."

The cells were processed on imec's solar cell pilot line using Meco's inline plating tool to deposit the Ni/Cu front contacts. The metallization process of the Ni/Cu stack included Ultraviolet (UV) laser ablation, sequential in-line plating of the metal layers and contact annealing. The resulting i-PERC solar cell achieved an average efficiency of 20.5% on more than 100 with a very low standard deviation of only 0.1percent and an average fill factor of 80 percent, validating the high quality of the front contacts.

We now have the advantage of using Meco's industrial plating techniques and tools that were not available to earlier Ni/Cu adopters," stated Richard Russell, Metallization module leader at imec. "This gives us the opportunity to develop a more robust and cheaper process than was previously possible."

"We are elated to have achieved these excellent results in the framework of imec's industrial affiliation program on advanced silicon photovoltaics aiming at a reduction of the cost/Watt-peak (Wp)", stated Martijn Zwegers, Product manager solar at Meco. "Collaborating within imec's industrial ecosystem enables us to accommodate our advanced plating tools to industrial processing."

Explore further: IMEC presents large area solar cells with 18.4% conversion efficiency, featuring Cu-plated contacts

Related Stories

Recommended for you

Plans for self-driving cars have pitfall: the human brain

July 19, 2016

Experts say the development of self-driving cars over the coming decade depends on an unreliable assumption by many automakers: that the humans in them will be ready to step in and take control if the car's systems fail.

How to build a 1,000mph car (by the scientists behind it)

July 22, 2016

It was a staggering feat, a car that went faster than the speed of sound. On October 15 1997, Andy Green travelled across the Black Rock Desert, Nevada, in the Thrust SSC at 763.035 mph, or Mach 1.02. Two decades on, that ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.