Abstract
Photoluminescence (PL) spectra of Cr doped BaxSr 1 − x TiO 3 (x = 0–0.84) (BST) thin films were investigated for the first time. XRD patterns revealed typical peaks of BST microcrystalline perovskite phase. Chromium doping of BST thin films was accompanied by the appearance of PL consisting of rather pronounced lines centered at 1.570–1.600 eV (789.8–774.9 nm) at 12 K, for x = 0–0.84, respectively. These lines are attributed to the zero-phonon transitions 2 E → 4 A 2 of octahedral coordinated Cr 3+ ions in Ti sites of BST. At T ≥ 165 K, the intra ion d-d transitions in Cr 3 + are not significantly influenced by the neighborhood of CrO 6 complexes.
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