Towards High-Efficiency GaAsP/Si Tandem Cells

S. Fan, M. Vaisman, K. Yaung, D. Martin-Martin, M. Leilaeioun, Z. Holman, M. Lee

Research output: Contribution to conferencePaper

1 Scopus Citations


In this work, we present recent progress towards high-efficiency epitaxial 1.7 eV/1.1 eV GaAsP/Si tandem cells. First, we present Si bottom cells with thick, epitaxial n-GaAsP optical filtering layers, yielding an efficiency of 6.25%. Furthermore, we demonstrate GaAsP/Si 2-terminal tandem cells with Voc of 1.596 V using an unoptimized tunnel junction to interconnect the GaAsP and Si sub-cells. Finally, we discuss the design of SiNx/SiOx double-layer anti-reflectance coating (ARC) for GaAsP/Si tandem cells, which boosted the Jsc by 28.9%.
Original languageAmerican English
Number of pages5
StatePublished - 2018
Event2017 IEEE 44th Photovoltaic Specialist Conference (PVSC) - Washington, D.C.
Duration: 25 Jun 201730 Jun 2017


Conference2017 IEEE 44th Photovoltaic Specialist Conference (PVSC)
CityWashington, D.C.

NREL Publication Number

  • NREL/CP-5900-73950


  • back contact
  • computer simulation
  • photovoltaic cells
  • silicon


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