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Superposition and Reciprocity in the Electroluminescence and Photoluminescence of Solar Cells

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1 Author(s)
Uwe Rau ; Institute of Energy and Climate Research 5—Photovoltaics, Germany

The reciprocity relation between electroluminescent emission and photovoltaic quantum efficiency of solar cells and light-emitting diodes is extended to the case of photoluminescence emission. Here, a superposition principle between voltage-driven electroluminescence and photoluminescence under short-circuit conditions is derived from the principle of detailed balance. Further generalizations of the reciprocity relation are discussed, as well as the limitations of the approach.

Published in:

IEEE Journal of Photovoltaics  (Volume:2 ,  Issue: 2 )