Photovoltaic performance enhancement by external recycling of photon emission

Avi Braun, Eugene A. Katz, Daniel Feuermann, Brendan M. Kayes, Jeffrey M. Gordon

Research output: Contribution to journalArticlepeer-review

55 Scopus citations


Experimental evidence of enhancing the performance of ultra-efficient solar cells by external recycling of photon emission is presented-predicated on the strategy of increasing cell open-circuit voltage by reducing radiative recombination. It is equivalent to restricting the angular range of photon emission, and can only be effective in photovoltaics with high external luminescent efficiency. This has precluded the voltage enhancement from being observable in today's photovoltaic technologies. As shown here, however, it is attainable with the latest generation of champion single-junction one sun thin-film GaAs cells. The measurements are understandable in terms of basic photovoltaic thermodynamics.

Original languageEnglish
Pages (from-to)1499-1503
Number of pages5
JournalEnergy and Environmental Science
Issue number6
StatePublished - 1 Jun 2013

ASJC Scopus subject areas

  • Environmental Chemistry
  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Pollution


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