Electron Paramagnetic Resonance and Photoluminescence Studies of Ultraviolet-Emitting ZnAl2O4:Gd3+ Phosphors

Optical characterization and defect-induced behavior in ZnAl1.999Ho0.001O4 spinel: Unraveling novel insights into structure, morphology, and spectroscopic features

“…The trivalent cation Ho 3+ , and generally the lanthanides Ln 3+ , substitute in the octahedral site of the Al 3+ ions ( Fig. 2 ) [ 23 , 24 ].

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