1 Correction to: Optical and Quantum Electronics (2020) 52:335 https://doi.org/10.1007/s11082-020-02448-9

Figure 2 has been published incorrectly in the original publication of the article. The correct version of the figure is provided with this correction.

Fig. 2
figure 1

The FE-SEM micrographs of the CuGaGeSe4 thin films at different magnification powers, as depicted, the ternary CuGaGeSe4 thin-film samples have a homogeneous surface and free crack samples