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We report a new certified world‐record efficiency for thin‐film Cu(In,Ga)Se2‐based photovoltaic sub‐modules of 17.4% (aperture area). The record efficiency of the 16 cm2, monolithically integrated, sub‐module has been independently confirmed by Fraunhofer ISE. The record device is the result of extensive co‐optimization of all processing steps. During the optimization process, strong focus has been...
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