Record Efficiency InGaAs Thermophotovoltaic Cells For Energy Storage Applications

Myles Steiner, Eric Tervo, Ryan France, Cecelia Luciano, Dustin Nizamian, Benjamin Johnson, Alexandra Young, Leah Kuritzsky, Emmett Perl, Moritz Limpinsel, Brendan Kayes, Taran Narayan, Madhan Arulanandam, Richard King, Andrew Ponec, David Bierman, Justin Briggs

Research output: NRELPresentation


Utility-scale energy storage is a significant technical challenge and a key barrier to widespread adoption of renewable energy. An efficient, modular, and scalable solution can be achieved by storing energy in the form of high-temperature heat and then extracting energy, on demand, using thermophotovoltaic (TPV) cells to convert the heat back to electricity. The ideal thermal emitter temperature is determined by balancing the desire for higher power densities, high-temperature compliant materials, and efficient, cost-effective thermophotovoltaic cells, among other considerations. 0.74-eV InGaAs lattice-matched to InP is a good choice for a cell absorber, and here we describe our development of InGaAs TPV cells with efficiencies of 38.8% from an ~1850 degrees celsius source temperature. This is the highest efficiency yet measured and reported for a single-junction TPV device. This efficiency was achieved by carefully quantifying and then reducing the parasitic absorption in the semiconductor layers, and by significantly reducing the series resistance to minimize the power loss.
Original languageAmerican English
Number of pages15
StatePublished - 2022

Publication series

NamePresented at the 18th International Conference on Concentrator Photovoltaic Systems Conference, 25-27 April 2022, Miyazaki, Japan

NREL Publication Number

  • NREL/PR-5900-82094


  • InGaAs
  • photovoltaic
  • PV
  • single-junction
  • thermophotovoltaic
  • TPV
  • utility-scale energy storage


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