RECENT RESULTS FOR THE DEPLOYMENT OF SILICON HETEROJUNCTION PRODUCTION LINES AT ENEL GREEN POWER: EFFECT OF THE NUMBER OF BUSBARS

We report on recent results obtained within the HETNA project, a collaboration between CEA-INES and Enel Green Power for the deployment of silicon heterojunctions solar cells and modules technologies in the production lines at 3SUN 2.0 site. SHJ cells and modules produced on the CEA-INES pilot lines show narrow efficiency distributions and good response with material and process variations: cells average efficiency ranges from 21.2% to 21.8% with the four busbars design while module peak power ranges between 366W to 374W. Increasing number of busbars from 4 to 5 enabled fill factor (FF) improvement by 0.7% abs. at both cells and modules levels without affecting the module reliability after thermal cycling. Finally, we present best cell and module (72 cells, bifacial) results obtained in 2018 reaching 23.9% and 388.4W respectively.