A study on the luminescent response of Europium doped barium aluminate nanophosphor

• Main Authors: Vinitha, N., Jose, Jini K., Mini Krishna, K.
• Format: Conference Proceeding
• Language: English
• Subjects: Aluminates; Barium; Emission analysis; Europium; Hydrothermal treatment; Imaging techniques; Nanophosphors; Optoelectronic devices; Phosphors; Room temperature; Structural analysis
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0158457

Rare earth doped aluminates have been extensively investigated owing to their high stability and versatile industrial processing characteristics suitable for various high-performance novel displays, optoelectronic device applications and bio-imaging techniques. The present work reports the synthesis of europium (Eu3+) doped barium aluminate nanophosphors at low processing temperatures via hydrothermal technique even without any post annealing processes. The homogenously prepared precursor solution (pH-10) hydrothermally treated at 150°C for 45 minutes was found to give the best luminescent response. The as-prepared undoped sample gave a room temperature luminescence in the blue region and the Eu doped samples showed an emission in the red region of the electromagnetic spectrum. The nature of the emissions from undoped and doped samples do assert that the phosphors synthesized are Ba-deficient and Eu has been incorporated in the form of Eu3+ and not Eu2+. Structural characterization using X-ray diffraction studies (XRD) also revealed the formation of Ba2Al10O17, an intermediate product of BaAl2O4 which favors red emission. UV-Visible spectroscopic studies confirmed the band gap of the samples to be around 5 eV. The results obtained were also compared with the luminescent response of a sample prepared using the ecofriendly microwave route.