Efficiency increase in multijunction monochromatic photovoltaic devices due to luminescent coupling

  title={Efficiency increase in multijunction monochromatic photovoltaic devices due to luminescent coupling},
  author={Daixi Xia and Jacob J. Krich},
  journal={arXiv: Applied Physics},
We present a multijunction detailed balance model that includes the effects of luminescent coupling, light trapping and nonradiative recombination, suitable for treatment of multijunction solar cells and photonic power converters -- photovoltaic devices designed to convert narrow-band light. The model includes both specular and Lambertian reflections using a ray-optic formalism and treats nonradiative processes using an internal radiative efficiency. Using this model, we calculate and optimize… 

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