Structural and luminescence properties of Eu3+ doped LaAlO3 nanophosphors by hydrothermal method

• Published in: Journal of materials science. Materials in electronics Vol. 30; no. 3; pp. 2750 - 2762
• Main Authors: Ankoji, P., Rudramadevi, B. Hemalatha
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.02.2019; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Dipole interactions; Dipoles; Electron microscopes; Emission analysis; Emission spectra; Europium; Field emission microscopy; Fourier transforms; Light emission; Luminescence; Materials Science; Microscopy; Nanophosphors; Optical and Electronic Materials; Optical properties; Photoluminescence; Scanning electron microscopy; Spectrum analysis; Transmission electron microscopy; Ultraviolet radiation; White light
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-018-0551-6

A series of La 1−x AlO 3 : xEu 3+ (x = 0, 2, 4, 6 and 8 mol%) nanophosphors have been synthesized by a hydrothermal technique and were investigated by an X-ray powder diffractometer, field emission scanning electron microscopy, high-resolution transmission electron microscopy and fourier transform infrared spectroscopy. Further, photoluminescent studies have also been orderly explored under the near-ultraviolet light excitation. When excited with 395 nm, the Eu 3+ : LaAlO 3 nanophosphors emission peaks observed at 579, 591, 620, 649 and 700 nm due to the 5 D 0 → 7 F j (J = 0–4) transitions of Eu 3+ ions. The prominent emission peak was perceived at 620 nm, which associated to the 5 D 0 → 7 F 2 hypersensitive transition of Eu 3+ ion. The optimum doping concentration of Eu 3+ in LaAlO 3 host is around 6 mol% and the concentration quenching effect is through the dipole–dipole interaction. The Commission International de I’Eclairage (CIE) color co-ordinates were determined from emission spectra and the values (x, y) were closer to National Television Standard Committee typical value of red emission. As an outcome, the prepared nanophosphors are highly suitable for red component of white light emitting devices.