Fig. 4: Evaluation of cathodoluminescence peak energy.
From: Microscopic origins of performance losses in highly efficient Cu(In,Ga)Se2 thin-film solar cells
a CL peak energy distribution map, from the identical cross-section area as in Fig. 3, and b extracted profile (red line in a) reveals band-gap energy fluctuations with a standard deviation (gray area) of <25 meV near the interface to the CdS buffer layer.
