Limiting efficiency of an intermediate band solar cell under a terrestrial spectrum

Stephen P. Bremner, Michael Y. Levy, Christiana B. Honsberg

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Abstract

The limiting efficiency of an intermediate band (IB) solar cell under the terrestrial AM1.5 spectrum was calculated by detailed balance for various concentration levels. The results show four energy gap combinations giving similar limiting efficiencies. This is in contrast to the more studied case of an IB solar cell under a blackbody spectrum where a single optimum combination is found. A design with a subenergy gap of ∼0.57 eV is found to be viable, leading to the conclusion that the design space for an IB solar cell is larger when under the AM1.5 spectrum than when under a Blackbody spectrum.

Original languageEnglish (US)
Article number171110
JournalApplied Physics Letters
Volume92
Issue number17
DOIs
StatePublished - May 9 2008
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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