The opto-electronic physics that broke the efficiency limit in solar cells

@article{Yablonovitch2012TheOP,
  title={The opto-electronic physics that broke the efficiency limit in solar cells},
  author={Eli Yablonovitch and Owen D. Miller and Sarah R. Kurtz},
  journal={2012 38th IEEE Photovoltaic Specialists Conference},
  year={2012},
  pages={001556-001559}
}
The internal physics of a solar cell changes as it approaches the fundamental Shockley-Queisser limit. Photonic considerations overtake electronic ones, as an intense internal and external luminescence requires careful photon management. Counter-intuitively, maximizing light extraction increases voltage and therefore efficiency. Until 2010 the one-sun, single-junction efficiency record was set by a GaAs solar cell with an efficiency of 26.4% and an open-circuit voltage VOC= 1.03 V. Alta Devices… 

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