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Keywords:

  • current balancing;
  • external quantum efficiency;
  • organic photovoltaics;
  • tandem cells
Thumbnail image of graphical abstract

White light bias External Quantum Efficiency (EQE) measurements made on organic tandem cells are demonstrated to provide a quick and direct measurement of current-balancing. EQE measurements under white light bias can therefore be used to help guide or measure optimisation in asymmetric multi-junction cells.