Abstract:The cucial point in selecting appropriate host materials and dopants for electroluminescent devices is the knowledge of the ionization energies of impurity ions from which an efficient emission may be obtained. RE ions represent a relatively simple system of dopants in wide bandgap materials. Due to the screening of the 4fq shell by the external 5s and 5p shells, all electronic and magnetic properties are either identical or close to those of free ions, and depend rather weakly on lattice ionicity, lattice par… Show more
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