Optical Properties of Er3+-Doped CdIn2O4 and CdIn2O4 Crystals

Cdin2o4 and cdin2o4:er3+ crystals were grown by solid-state sintering of cdo and in2o3 with ercl3. x-ray diffraction analysis revealed that cdin2o4 and cdin2o4:er3+ adopt a cubic structure with respective lattice constants of a=9.1655 å and a=9.1662 å. the optical absorption spectra obtained near the fundamental absorption edge showed that these compounds have a direct energy band gap. the photoluminescence (pl) spectra of cdin2o4:er3+ acquired in the wavelength range of 630-700 nm at 294 k showed peaks in the region of 651-686 nm and eight sharp emission peaks due to the er3+ ions. these pl peaks were attributed to radiative transitions between the split electron energy levels of the er3+ ions occupying the in3+ sites of the cdin2o4 host lattice. © 2017 tae hwan bang et al.