40% efficient metamorphic GaInPGaInAsGe multijunction solar cells

R. R. King, D. C. Law, K. M. Edmondson, C. M. Fetzer, G. S. Kinsey, H. Yoon, R. A. Sherif, N. H. Karam

Research output: Contribution to journalArticle

987 Scopus citations

Abstract

An efficiency of 40.7% was measured and independently confirmed for a metamorphic three-junction GaInPGaInAsGe cell under the standard spectrum for terrestrial concentrator solar cells at 240 suns (24.0 W cm2, AM1.5D, low aerosol optical depth, 25 °C). This is the initial demonstration of a solar cell with over 40% efficiency, and is the highest solar conversion efficiency yet achieved for any type of photovoltaic device. Lattice-matched concentrator cells have now reached 40.1% efficiency. Electron-hole recombination mechanisms are analyzed in metamorphic Gax In1-x As and Gax In1-x P materials, and fundamental power losses are quantified to identify paths to still higher efficiencies.

Original languageEnglish (US)
Article number183516
JournalApplied Physics Letters
Volume90
Issue number18
DOIs
StatePublished - May 10 2007

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    King, R. R., Law, D. C., Edmondson, K. M., Fetzer, C. M., Kinsey, G. S., Yoon, H., Sherif, R. A., & Karam, N. H. (2007). 40% efficient metamorphic GaInPGaInAsGe multijunction solar cells. Applied Physics Letters, 90(18), [183516]. https://doi.org/10.1063/1.2734507