Global Sources
EE Times-India
Stay in touch with EE Times India
 
EE Times-India > Power/Alternative Energy
 
 
Power/Alternative Energy  

Imec reduces cost-of-ownership of i-PERC tech

Posted: 29 Nov 2013     Print Version  Bookmark and Share

Keywords:Imec  i-PERC  aluminum oxide  solar cell 

Imec has developed large area (156 x 156mm) i-PERC-type silicon solar cells using a processing sequence based on laser doping from a thin atomic layer deposited (ALD) aluminum oxide (Al2O3) layer to realize the local aluminum Back Surface Field (BSF) and Ni/Cu plating to form the front contact. According to the nanoelectronics research center, the cells achieved average conversion efficiencies of 20.2 percent.

The laser doping processing sequence eliminates the necessity of a firing step to create the local BSF in i-PERC solar cells. Combined with Imec's Ni/Cu plating sequence for front contact formation, it provides a low temperature metallization solution for i-PERC cells. By avoiding high temperature conditions, passivation degradation of the rear Al2O3 layer, as well as optical degradation of the rear dielectric/metal stack are prevented, resulting in improved solar cell conversion efficiency. Additionally to the performance benefit, this process sequence is extremely simple because the thin ALD Al2O3 acts at the same time as passivation layer and doping source, while laser processing enables in one step the contact patterning and the local BSF formation.

Even though only low temperature anneal was used, the high Fill Factor of the cells (up to 80 percent) indicates an excellent contact quality.

"Cost-of-ownership and process simplicity are key factor for the industry to adopt new technologies," stated Jozef Szlufcik, Si PV program director at Imec. "Our achievement, implying a substantial simplification of the i-PERC manufacturing process, is an important step towards reducing the cost-of-ownership of i-PERC technology and as such, a milestone in bringing this high-efficiency technology for silicon solar cells to the market."





Comment on "Imec reduces cost-of-ownership of i-..."
Comments:  
*  You can enter [0] more charecters.
*Verify code:
 
 
Webinars

Seminars

Visit Asia Webinars to learn about the latest in technology and get practical design tips.

 

Go to top             Connect on Facebook      Follow us on Twitter      Follow us on Orkut

 
Back to Top