Enhanced near-infrared quantum cutting in CaMoO4:Yb3+ phosphors induced by doping with Li+ ions for improving solar cells efficiency

Typical FE-SEM images of the CaMoO4:10%Yb3+ phosphors doped with different Li+ concentrations (0, 1, 5, 10, 20%) as shown in (a), (b), (c), (d), (e), respectively.