The optical properties of Eu³⁺ and Tm³⁺ codoped Y₂O₃ submicron particles

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• 作者：Timur Sh. Atabaev ; Hong Ha Thi Vu ; Hyung-Kook Kim ; ^{hkkim@pusan.ac.kr} ; Yoon-Hwae Hwang ; ^{yhwang@pusan.ac.kr}
• 关键词：Y2O3 particles ; Luminescence ; Urea homogeneous precipitation ; Doping
• 刊名：Journal of Alloys and Compounds
• 出版年：2012
• 出版时间：5 June, 2012
• 年：2012
• 卷：525
• 期：Complete
• 页码：8-13
• 全文大小：1006 K

文摘

This report presents a fabrication result of nearly uniform-shaped color-tunable Y₂O₃ submicron particles codoped with Eu and Tm ions. The resulted particles were characterized by X-ray diffraction, field emission scanning electron microscope and field emission transmission electron microscope, whereas their optical properties were monitored by photoluminescence spectroscopy. The room temperature luminescence emission of synthesized particles was investigated in detail. It was shown that Eu³⁺ and Tm³⁺ codoped Y₂O₃ submicron particles exhibits red luminescence (612 nm) under 255 nm excitation, while the emission color of the same particles can be tuned to blue (459 nm) under 320 nm excitation. Different concentrations of Eu³⁺ and Tm³⁺ were induced into the Y₂O₃ lattice and the luminescence quenching was observed at high dopant concentrations.