Journal
APPLIED PHYSICS LETTERS
Volume 103, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4816837
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Funding
- People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme under REA [299878]
- U.S. Department of Energy [DE-AC36-08GO28308]
- National Renewable Energy Laboratory
- Foundational Program to Advance Cell Efficiency (F-PACE)
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We demonstrate 1.81 eV GaInP solar cells approaching the Shockley-Queisser limit with 20.8% solar conversion efficiency, 8% external radiative efficiency, and 80-90% internal radiative efficiency at one-sun AM1.5 global conditions. Optically enhanced voltage through photon recycling that improves light extraction was achieved using a back metal reflector. This optical enhancement was realized at one-sun currents when the non-radiative Sah-Noyce-Shockley junction recombination current was reduced by placing the junction at the back of the cell in a higher band gap AlGaInP layer. Electroluminescence and dark current-voltage measurements show the separate effects of optical management and non-radiative dark current reduction. (C) 2013 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4816837]
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