Table 2 Real (\({\in }_{1}(\upomega ))\) and Imaginary \({(\in }_{2}(\upomega ))\) parts of the dielectric function in the visible region at E _photon = 1.65 eV (\(\lambda\) \(\approx\) 750 nm).

From: Tuning the optoelectronic properties of hematite with rhodium doping for photoelectrochemical water splitting using density functional theory approach