Europium Doped SrSnO₃ Perovskite: Structural, Spectroscopic, and Luminescent Characterization for Advanced Lighting Technologies and Beyond

Abstract

This study explores the incorporation of Eu 3+ ions into SrSnO 3 and their effect on the structural, spectroscopic, and luminescent properties. X-ray diffraction (XRD) and Fouriertransform infrared (FTIR) analysis confirm the successful doping of Eu 3+ . Density functional theory (DFT) calculations reveal an indirect band gap, with an estimated experimental value of 2.8 eV for 5% Eu 3+ , as determined by diffuse reflectance spectroscopy (DRS). Photoluminescence (PL) analysis shows a red emission at 612 nm, corresponding to the 5 D 0 → 7 F 2 transition of Eu 3+ ions. Under 256 nm UV excitation, the optimal luminescent properties were observed at 5 mol % Eu 3+ , displaying a predominant red emission at 612 nm attributed to the 5 D 0 → 7 F 2 transition of Eu 3+ ions. The study found that emission intensity decreased beyond a certain concentration due to concentration quenching effects determined through Blasse equation. Judd−Ofelt intensity parameters were calculated from the emission spectra, and Ω 2 and Ω 4 , are (1.15 and 1.09) × 10 −20 cm 2 , respectively for 5% Eu 3+ doped SrSnO 3 . The emission properties for the