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 journalArticlepeer-review

1120 Scopus citations


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
Issue number18
StatePublished - 2007
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of '40% efficient metamorphic GaInPGaInAsGe multijunction solar cells'. Together they form a unique fingerprint.

Cite this