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Journal of Alloys and Compounds, Volume 572, Pages 113-117. (2013).
Timur Sh Atabaev, Zhonglie Piao, Yoon-Hwae Hwang, Hyung-Kook Kim, Nguyen Hoa Hong.
Department of Physics and Astronomy, Seoul National University, Gwanak-gu, Seoul 151-747, Republic of Korea and
Department of Cogno Mechatronics Engineering, World Class University Program, Pusan National University, Busan 609-735, Republic of Korea and
Department of Nanomaterials Engineering and BK 21 Nano Fusion Technology Division, Pusan National University, Miryang 627-706, Republic of Korea.
Abstract
This study examined the enhanced upconversion luminescence emission of bimodal Gd2O3:Er3+ particles by codoping with a trace amount of Li+ ions. Gd2O3:Er3+/Li3+ composite particles with enhanced upconversion luminescence emission were synthesized by using a simple urea homogeneous precipitation method. The effect of the particle size and Er3+/Li+ concentration ratio on the structural, morphological and optical properties of Gd2O3:Er3+/Li+ particles were studied systematically by X-ray powder diffraction, field emission scanning electron microscopy and room temperature photoluminescence. Strong upconversion eye-visible green light emission was observed from the Gd2O3:Er3+/Li+ particles under continuous near-infrared pump excitation from a commercially available diode laser. Monodisperse bimodal Gd2O3:Er3+/Li+particles show a good potential for biomedical and solid state lighting applications.
