Efficient visible upconversion luminescence in Er³⁺ and Er³⁺/Yb³⁺ co-doped Y₂O₃ phosphors obtained by solution combustion reaction

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• 作者：Vijay Singh^a ; ^{vijayjiin2006@yahoo.com" class="auth_mail} ; P. Haritha^b ; V. Venkatramu^b ; S.H. Kim^a ; ^{sanghhkim@konkuk.ac.kr" class="auth_mail}
• 关键词：Y2O3 ; Combustion ; Up-conversion ; Er3+ ; Yb3+
• 刊名：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
• 出版年：21 May, 2014
• 年：2014
• 卷：126
• 期：Complete
• 页码：306-311
• 全文大小：934 K

文摘

Combustion derived Er³⁺ -doped Y₂O₃ and Er³⁺/Yb³⁺co-doped Y₂O₃ powders have been characterized by X-ray diffraction, energy dispersive X-ray analysis, Fourier transform infrared spectroscopy and laser excited spectroscopy. Formation of Y₂O₃ phosphor was confirmed by X-ray diffraction and energy dispersive X-ray analysis. The vibrational properties of Y₂O₃ powder was studied by Fourier transform infrared spectroscopy. The luminescence spectra of Er³⁺ -doped and Er³⁺/Yb³⁺ co-doped Y₂O₃ powders were studied under 379 nm excitation. The strong up-conversion luminescence for Er³⁺ -doped and Er³⁺/Yb³⁺ co-doped Y₂O₃ powders have been observed under 978 nm laser excitation. The effect of Yb³⁺ addition on optical and luminescence properties of Er³⁺:Y₂O₃ powders were studied. The ratio of red to green intensity has been enhanced when Er³⁺ -doped Y₂O₃ is co-doped with Yb³⁺ ions. The effect of co-doping of Yb³⁺ ions on the visible luminescence intensity of Er³⁺ has been studied and the mechanism responsible for the variation in the green and red intensity is discussed.