Y2O3:Eu3+ nanophosphors: Synthesis by microwave-assisted heating method and characterization

4^th International Conference and Exhibition on Materials Science & Engineering

September 14-16, 2015 Orlando, USA

Adrine Malek Khachatouriana,b, Farhad G Fardb, H Sarpoolakyb, Carmen Vogta and M S Topraka

aKTH � Royal Institute of Technology, Sweden bIran University of Science and Technology, Iran

ScientificTracks Abstracts-Workshop: J Material Sci Eng

Abstract :

Rare earth doped Y2O3 based nanophosphors, especially Y2O3:Eu3+ compounds have recently received an increased research interest due to their potential applications in display devices, temperature sensing devices, solid state lasers, as well as bio labels, bioimaging probes and medical diagnostics. Here, we report on the fabrication of monodispersed spherical Y2O3:Eu3+ nanophosphors using microwave-assisted heating method. This method is a green, energy efficient, high yield and highly reproducible. The effect of different reaction parameters on morphological characterization, as well as the correlation between Eu3+ doping and calcination temperature on the structural and luminescence properties of Y2O3:Eu3+ nanoparticles are investigated in detail. X-ray diffraction (XRD) analysis indicates that the as prepared particles have Y(OH)CO3 composition, which converts to Y2O3:Eu3+ starting from 500 �°C and become crystalline at higher temperatures. The transmission electron microscopy (TEM) micrographs show that the particles are spherical, monodispersed and non-agglomerated. High resolution TEM reveals polycrystalline nature of the calcined particles. Furthermore, increasing Eu3+ concentration from 0 mol % to 13 mol % the overall size of particles increases from 61 �± 8 nm to 86 �± 9 nm. Photoluminescence (PL) analysis of Y2O3:Eu3+ particles indicates a strong red emission peak at 613 nm corresponding to 5D0â��7F2 forced electric dipole transition of Eu3+ ions under UV excitation. The emission peak increases proportionally with Eu3+ concentration and the calcination temperature with no luminescence quenching phenomenon observed even for Y2O3:13%Eu3+. The red emission characteristics, the morphological properties as spherical shape, monodispersity and nonagglomeration, combined with being heavymetal free render these particles as promising bio-labels and bio imaging probes.

Biography :

Adrine Malek Khachatourian has completed her BSc degree in Material Science and Engineering in 2008 and her MSc degree in Materials Engineering-Ceramic in 2010 from Iran University of Science and Technology (IUST). She spent two years on her PhD at (IUST) and now she is completing her PhD study at the Department of Materials & Nano Physics, KTH-Royal Institute of Technology, Stockholm, Sweden under the guidance of Prof. Muhammet S. Toprak. Her research interest focuses on synthesis and characterization of Rare-earth doped Yttrium oxide nanoparticles for fluorescent bioimaging via microwave method.

Email: adrine@kth.se