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

Sep 22, 2009
IMEC's i-PERC cell with shallow emitter and Cu metallization.

At the European Photovoltaic Solar Energy Conference (Hamburg, Germany), IMEC presents a large-area solar with a conversion efficiency of 18.4%.

Compared to the standard i-PERC cell process, IMEC's solar cell features a shallow emitter and advanced front metallization using copper plating. The results were obtained on large-area cells (125cm2), proving the industrial viability of the process.

The shallow emitter results in an enhanced blue response, and thus in a higher conversion efficiency than with a standard emitter.  For the front contacts, a novel metallization stack is added which is applied to local openings in the antireflective .  Dr. Joachim John, team manager at IMEC: “Using copper instead of silver adds to the sustainability of solar cell production. IMEC was able to do this because it has extensive experience with copper plating on ”. A similar efficiency result was obtained with screen printed contacts, but the long-term sustainability and low-cost potential of Cu-based contacting solutions and the fact that this was a first result obtained without dedicated fine-tuning makes this result particularly encouraging. ”

Dr. Jef Poortmans, IMEC’s Photovoltaics Program Director, states “These cells and the new metallization stack involved are a further successful step in IMEC’s target to develop ever more cost-effective, efficient crystalline Si - eventually targeting cells that are only 40µm thick with efficiencies above 20%.

Source: IMEC

Explore further: Bose sues Beats over headphone patents

add to favorites email to friend print save as pdf

Related Stories

Recommended for you

Scalping can raise ticket prices

15 hours ago

Scalping gets a bad rap. For years, artists and concert promoters have stigmatized ticket resale as a practice that unfairly hurts their own sales and forces fans to pay exorbitant prices for tickets to sold-out concerts. ...

User comments : 0