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Photoluminescent Properties of (La1−xYx)0.94Tb0.06PO4 Phosphor Powders Prepared by Ultrasonic Spray Pyrolysis

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Abstract:

The calculated crystallite sizes of (La1−xYx)0.94Tb0.06PO4 (0 ≤ x ≤ 1.0) phosphors ranged from 37–39 nm. Annealed (La1−xYx)0.94Tb0.06PO4 (0 ≤ x ≤ 1.0) phosphors showed a smooth, regular, and spherical morphology. Strong excitation peaks were appeared at 226 and 270 nm for all the phosphors. These were caused by the crystal splitting of 7D and 9D of 4f75d1 configuration in Tb3+, respectively. The characteristic emission peaks were observed at 489, 543, 585, and 621 nm, which were caused by the 5D4-7Fj (j = 6–3) transitions of Tb3+, respectively. The emission intensity at 543 nm increased with an increase in Y content up to 0.5 and then decreased for a higher Y content.

Keywords: (LA,Y)PO4; EMISSION; EXCITATION; PHOSPHOR; TB3+; ULTRASONIC SPRAY PYROLYSIS

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2008.1211

Publication date: October 1, 2008

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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