40% efficient metamorphic GaInP∕GaInAs∕Ge multijunction solar cells
Open accessAbstract
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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- Authors
- King, R. R., Law, D. C., Edmondson, K. M., Fetzer, C. M., Kinsey, G. S., Yoon, H., Sherif, R. A., & Karam, N. H.
- Affiliations
- Spectral Labs (United States) (US)
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2007-04-30
- Volume
- 90
- Issue
- 18
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2058199769
- Cited by
- 1,238
- References
- 4
- Citations by year
- 2026: 14 · 2025: 28 · 2024: 35 · 2023: 28 · 2022: 31 · 2021: 48 · 2020: 37 · 2019: 72 · 2018: 81 · 2017: 66 · 2016: 62 · 2015: 77 · 2014: 113 · 2013: 108 · 2012: 95
- FWCI
- 80.32
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Applied Physics Letters (publishedVersion, cc-by)
- Funders
- National Renewable Energy Laboratory
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › solar cell performance optimization
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Silicon and Solar Cell Technologies
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Chalcogenide Semiconductor Thin Films
- Keywords
- metamorphic solar cells, high-efficiency photovoltaics, concentrated photovoltaics, power conversion efficiency, electron-hole recombination, power losses, lattice-matched solar cells, GaInAs, GaInP
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