Al2O3 passivation approach supports 20.1 percent efficiency in industrial PERC Si solar cells

Technology News |
By eeNews Europe

The i-PERC-type silicon solar cells have been manufactured on imec’s silicon solar cell pre-pilot line using RENA’s InPilot tool for rear-side polishing and emitter removal, and SoLayTec’s spatial ALD tool for Al2O3 deposition. These cells reached a best cell conversion efficiency of 20.1% and open circuit voltages up to 655mV. When applying Cu-plated contacts at the front instead of silver screen printed contacts, a top efficiency of 20.6% was reached.

The results will be presented at next week’s European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC) in Paris.

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