Fig. 6: External quantum efficiency and photoluminescence.
From: Microscopic origins of performance losses in highly efficient Cu(In,Ga)Se2 thin-film solar cells
EQE spectrum (black) and the first derivative of the EQE curve (red) of the high-efficient solar cell as well as the average absolute PL spectrum (blue) acquired also on the identical solar cell at an excitation equivalent to the illumination intensity of one sun.
