Judd–Ofelt Analysis of Barium Zirconate Doped with Various Concentrations of Europium (III)

Abstract

A perovskite material, Barium Zirconate (BZO) doped with 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0 mol% of Europium (III) were prepared using a solid-state reaction technique. X-ray diffraction (XRD) pattern of BZO doped with 2.0 mol% of Europium was observed. The experimental XRD pattern matched significantly with the standard XRD pattern with the Crystallographic Open Database (COD) card number (96-153-2744) with a figure of merit of 0.89. Photoluminescence emission spectra of the samples prepared exhibited two prominent peaks centred at 592 nm and 612 nm which were attributed to the transitions (5 D 0 → 7 F 2) and (5 D 0 → 7 F 4) respectively. The concentration quenching occurred when the doping concentration was increased after 2.0 mol% of Europium (III). A coordinate (0.58, 0.41) was found in the Colour Chromaticity Diagram (CIE), which falls in orange–red region. The method involved in the calculation of the Judd-Ofelt intensity parameter was briefly described. The ratio R 21 = I (5 D 0 → 7 F 2)/I (5 D 0 → 7 F 1) was found as 2.93 which is indicative that the electric dipole transitions are more prominent in comparison to the magnetic dipole transitions. The value of intensity parameters Ω 2 Ω 4 was found as 4.98 × 10−20 cm2 and 8.56 × 10−20 cm2 respectively.