Fig. 4


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J-V parameter comparison between reference (bare) and passivated ultrathin CIGS solar cells: (a) Voc (left axis) and Jsc (right axis), (b) J0 (left axis) and FF(right axis), (c) J-V curves with best efficiency values and (d) EQE responses for different KF molarity with 2 nm thick HfOx layer.

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