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Effect of Lithium Doping on the Transport Properties of MoO$ _{3}$ Ceramics
New Phys.: Sae Mulli 2019; 69: 1016~1020
Published online October 31, 2019;
© 2019 New Physics: Sae Mulli.

Yujung AHN, Gowoon KIM, Joonhyuk LEE, Hyun Jung KIM, Jaekwang LEE, Hyoungjeen JEEN*

Department of Physics, Pusan National University, Busan 46241, Korea
Correspondence to:
Received June 26, 2019; Revised August 8, 2019; Accepted September 4, 2019.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
In this research, we studied the effects of lithium doping on the transport properties of MoO$ _{3}$ ceramics. A series of lightly lithium-doped MoO$ _{3}$ ceramics was prepared: 2, 4 and 8 mol\% Li-doped MoO$ _{3}$. The x-ray diffraction analysis confirmed that the typical MoO$ _{3}$ structures were retained at the low doping. However, from laser-induced-breakdown spectroscopy, the differences in the peak intensities of the doped samples clearly indicates that lithium ions are successfully incorporated into the lattices in different amounts. To see the effects of the lithium doping on the transport properties in the MoO$ _{3}$ lattices, impedance spectroscopy is used in the capacitor geometry. A systematic increase in the overall bulk conductivity and a faster relaxation behavior were observed when the doping level was increased. Lastly, when the doping level was increased the activation energy was drastically decreased, which indicates that the lithium facilitates transport along a 2D path.
PACS numbers: 77.84.Bw, 84.37.+q
Keywords: Transition metal oxide, Ceramic, Laser induced breakdown spectroscopy, Impedance spectroscopy, Conductivity

October 2019, 69 (10)
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