Europium Doped SrSnO<sub>3</sub> Perovskite: Structural, Spectroscopic, and Luminescent Characterization for Advanced Lighting Technologies and Beyond
Aadil Ahmad Bhat, Wengang Bi, Adil Shafi Ganie, Shakeel Ahmad Sofi, Radha Tomar, Hisham S. M. Abd‐Rabboh, Imam Saheb Syed
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 Fourier-transform 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 5 D 0 → 7 F 1, 5 D 0 → 7 F 2, and 5 D 0 → 7 F 4 emission transitions are also estimated with J–O parameters. The higher magnitude of branching ratios (58%) and emission cross sections (7.09 × 10 –22 cm 2 ) suggest that the Eu 3+ doped SrSnO 3 perovskite may be suitable for efficient red emitting device applications. This research provides insights into the structural and spectroscopic properties of Eu-doped SrSnO 3 perovskites, highlighting their potential for advanced lighting technologies in agriculture and plant growth.