The Sol–Gel Process Synthesis of GdAl3(BO3)4:Eu3+ Nanophosphors

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Abstract:

GdAl3(BO3)4:Eu3+ red phosphors were prepared using citric acid as complex agent by sol–gel technique. The preparation conditions of the precursor synthesis, including crystallization temperature and crystallization time were investigated. Their structure and luminescence properties were characterized by X-ray diffraction (XRD) analysis and fluorescence spectrometry. The results showed that GdAl3(BO3)4:Eu3+ phosphor crystallized at 960 °C for 2 h have been synthesized by sol–gel method. The phosphor is distributed into hexagonal system and the lattice parameters are a = 9.2992 nm c = 7.2577 nm. The excitation spectrum of Gd0.95Al3(BO3)4:Eu0.05 3+ samples is complex and the frequency scale is wide. It consists of a number of main excitation transitions namely 8S7/26I J (270 nm) of Gd3+, and the others 7F05L6 (400 nm), 7F05D2 (472 nm) and 7F05D1 (542 nm) of Eu3+. The main emission peaks are 614 nm and 619 nm, which are the characteristic emission peaks of Eu3+. These emission peaks correspond to the transition from 5D0 to 7F2 of Eu3+. The shape and the wavelength range of the emission spectrum are similar when the sample was excited by different excitation spectrum. Only the relative intensity of the emission peaks is different from each other.

Keywords: GDAL3(BO3)4; RED PHOSPHORS; SOL-GEL PROCESS

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.5242

Publication date: November 1, 2011

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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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