Doping-Site Dependence of Upconversion Emission of Ho3+ Ion in BaHfO3
J. Korean Phys. Soc. 2020; 76: 155~161
Published online January 31, 2020 © 2020 The Korean Physical Society.

Department of Physics, Soongsil University, Seoul 06978, Korea
Correspondence to: Y. S. Lee

We investigated the doping-site dependence of upconversion (UC) emission characteristics of Ho3+ and Yb3+ ions co-doped BaHfO3 (BHO). The Ho3+ and Yb3+ ions could be doped in Ba-site (A-site) and Hf-site (B-site) of BHO. Under 980-nm near-infrared excitation, we detected sizable green (550 nm) and red (660 and 760 nm) UC emissions from Ho3+ ions assisted by Yb3+ ions. More interestingly, the UC emission intensities of B-site doped samples were greater than those of A-site doped samples. We suggested that the asymmetry ratio in the local structure around Ho3+ ions should be an important factor for the UC emission.

PACS numbers: 78.20.-e, 78.55.Hx
Keywords: BaHfO3, Ho3+/Yb3+, Upconversion, Doping site, Temperat

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