Infrared to ultraviolet upconversion luminescence in Nd3+ doped nano-glass-ceramic
来源期刊：JOURNAL OF RARE EARTHS2008年第3期
论文作者：YU Yunlong HUANG Ping LIU Feng CHEN Daqin WANG Yuansheng
Key words：upconversion; ultraviolet; nanocrystal; glass ceramic; rare earths;
Abstract: Nd3+ doped transparent oxyfluoride glass ceramic containing β-YF3 nanocrystals was prepared and the upconversion luminescence behaviors of Nd3+ in the precursor glass and glass ceramic were investigated. Under 796 nm laser excitation, ultraviolet upconversion emissions of Nd3+ ions at 354 nm (4D3/2→4I9/2) and 382 nm (4D3/2→4I11/2) were observed at room temperature. Power dependence analysis demonstrated that three-photon upconversion processes populated the 4D3/2 excited state. In comparison with those of the precursor glass, the ultraviolet emissions were enhanced by a factor of 500 in the glass ceramic, which was attributed to the change in the ligand field of Nd3+ ions and the decrease in phonon energy because of the partition of Nd3+ ions into the β-YF3 nanocrystals after crystallization.
YU Yunlong1，HUANG Ping1，LIU Feng1，CHEN Daqin1，WANG Yuansheng1
(1.State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China)
Abstract:Nd3+ doped transparent oxyfluoride glass ceramic containing β-YF3 nanocrystals was prepared and the upconversion luminescence behaviors of Nd3+ in the precursor glass and glass ceramic were investigated. Under 796 nm laser excitation, ultraviolet upconversion emissions of Nd3+ ions at 354 nm (4D3/2→4I9/2) and 382 nm (4D3/2→4I11/2) were observed at room temperature. Power dependence analysis demonstrated that three-photon upconversion processes populated the 4D3/2 excited state. In comparison with those of the precursor glass, the ultraviolet emissions were enhanced by a factor of 500 in the glass ceramic, which was attributed to the change in the ligand field of Nd3+ ions and the decrease in phonon energy because of the partition of Nd3+ ions into the β-YF3 nanocrystals after crystallization.
Key words:upconversion; ultraviolet; nanocrystal; glass ceramic; rare earths;
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