High-Voltage Monocrystalline Si Photovoltaic Minimodules Based on Poly-Si/SiOx Passivating Contacts for High-Power Laser Power Conversion: Article No. 112286

Matthew Hartenstein, Ryan France, William Nemeth, San Theingi, Matthew Page, Sumit Agarwal, David Young, Paul Stradins

Research output: Contribution to journalArticlepeer-review

2 Scopus Citations

Abstract

By using photovoltaic cells under high-intensity laser illumination, much higher photoconversion efficiencies are obtained than under the solar spectrum. We demonstrate a monocrystalline Si based minimodule to convert laser light into electricity using edge-illuminated Si "minicells" based on polysilicon on silicon oxide passivating contacts. Ten fully metallized devices were stacked in series and illuminated from the edge, creating a high-voltage, low-current minimodule that mitigates resistive and Auger-Meitner losses. The minimodule shows a high open-circuit voltage of >5 V when tested under 1-Sun illumination and >7 V at higher illumination intensities when tested with a flash simulator. The fill factor in these minimodules is limited by shunting at low illuminations but reaches a maximum of ~78% for higher illumination intensities >40 Suns (current density >1200 mA/cm2), indicating that the minimodules are not limited by series resistance up to 40 Suns. Under 1000 nm monochromatic light, we measure efficiencies >40% at > 40 Suns equivalent illumination, showing the potential of passivated contact Si cells for laser power conversion.
Original languageAmerican English
Number of pages8
JournalSolar Energy Materials and Solar Cells
Volume255
DOIs
StatePublished - 2023

NREL Publication Number

  • NREL/JA-5900-84602

Keywords

  • Auger-Meitner losses
  • laser power conversion
  • minimodules
  • monocrystalline Si
  • passivated contact
  • poly-Si/SiOx
  • PV
  • Quokka3
  • resistive losses

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