40% efficient metamorphic GaInP∕GaInAs∕Ge multijunction solar cells | Zendy

Richard R. King | Zendy; D. C. Law | Zendy; K. Edmondson | Zendy; C. M. Fetzer | Zendy; Geoffrey S. Kinsey | Zendy; Hyoseok Yoon | Zendy; R.A. Sherif | Zendy; N.H. Karam | Zendy

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40% efficient metamorphic GaInP∕GaInAs∕Ge multijunction solar cells

Author(s) -

Richard R. King,

D. C. Law,

K. Edmondson,

C. M. Fetzer,

Geoffrey S. Kinsey,

Hyoseok Yoon,

R.A. Sherif,

N.H. Karam

Publication year - 2007

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2734507

Subject(s) - suns in alchemy , optoelectronics , materials science , energy conversion efficiency , solar cell , concentrator , solar cell efficiency , photovoltaic system , metamorphic rock , gallium arsenide , optics , electrical engineering , physics , geochemistry , geology , engineering

An efficiency of 40.7% was measured and independently confirmed for a metamorphic three-junction GaInP∕GaInAs∕Ge cell under the standard spectrum for terrestrial concentrator solar cells at 240 suns (24.0W∕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 GaxIn1−xAs and GaxIn1−xP materials, and fundamental power losses are quantified to identify paths to still higher efficiencies.

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