Boosting the Efficiency of III-V/Si Tandem Solar Cells

Stephanie Essig, Christophe Allebe, John F. Geisz, Myles A. Steiner, Bertrand Paviet-Salomon, Antoine Descoeudres, Adele Tamboli, Loris Barraud, Scott Ward, Nicolas Badel, Vincenzo Lasalvia, Jacques Levrat, Matthieu Despeisse, Christophe Ballif, Paul Stradins, David L. Young

Research output: Contribution to conferencePaperpeer-review

9 Scopus Citations


We have developed Si-based tandem solar cells with a certified 1-sun efficiency of 29.8% (AM1.5g). The four-terminal tandem devices consist of 1.8 eV rear-heterojunction GaInP top cells and silicon heterojunction bottom cells. The two subcells were fabricated independently in two different labs and merged using an optically transparent, electrically insulating epoxy. Work is ongoing to further improve the performance of each subcell and to push the tandem cell efficiency to > 30%.

Original languageAmerican English
Number of pages3
StatePublished - 18 Nov 2016
Event43rd IEEE Photovoltaic Specialists Conference, PVSC 2016 - Portland, United States
Duration: 5 Jun 201610 Jun 2016


Conference43rd IEEE Photovoltaic Specialists Conference, PVSC 2016
Country/TerritoryUnited States

Bibliographical note

Publisher Copyright:
© 2016 IEEE.

NREL Publication Number

  • NREL/CP-5J00-67933


  • III-V semiconductor materials
  • multi-junction solar cell
  • silicon solar cells


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