Infrared-optical spectroscopy of transparent conducting perovskite (La,Ba)SnO3 thin films

Dongmin Seo; Kwangnam Yu; Young Jun Chang; Egon Sohn; Kee Hoon Kim; E. J. Choi

doi:10.1063/1.4861776

Infrared-optical spectroscopy of transparent conducting perovskite (La,Ba)SnO₃ thin films

Dongmin Seo, Kwangnam Yu, Young Jun Chang, Egon Sohn, Kee Hoon Kim, E. J. Choi

Department of Physics

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

We have performed optical transmission, reflection, spectroscopic ellipsometry, and Hall effect measurements on the electron-doped La _xBa_1-xSnO₃ (x = 0.04) transparent thin films. From the infrared Drude response and plasma frequency analysis we determine the effective mass of the conducting electron m* = 0.35m ₀. In the visible-UV region the optical band gap shifts to high energy in (La,Ba)SnO₃ by 0.18 eV compared with undoped BaSnO ₃ which, in the context of the Burstein-Moss analysis, is consistent with the infrared-m*. m* of BaSnO₃ is compared with other existing transparent conducting oxides (TCO), and implication on search for high-mobility TCO compounds is discussed.

Original language	English
Article number	022102
Journal	Applied Physics Letters
Volume	104
Issue number	2
DOIs	https://doi.org/10.1063/1.4861776
State	Published - 13 Jan 2014

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abstract = "We have performed optical transmission, reflection, spectroscopic ellipsometry, and Hall effect measurements on the electron-doped La xBa1-xSnO3 (x = 0.04) transparent thin films. From the infrared Drude response and plasma frequency analysis we determine the effective mass of the conducting electron m* = 0.35m 0. In the visible-UV region the optical band gap shifts to high energy in (La,Ba)SnO3 by 0.18 eV compared with undoped BaSnO 3 which, in the context of the Burstein-Moss analysis, is consistent with the infrared-m*. m* of BaSnO3 is compared with other existing transparent conducting oxides (TCO), and implication on search for high-mobility TCO compounds is discussed.",

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T1 - Infrared-optical spectroscopy of transparent conducting perovskite (La,Ba)SnO3 thin films

AU - Seo, Dongmin

AU - Yu, Kwangnam

AU - Jun Chang, Young

AU - Sohn, Egon

AU - Hoon Kim, Kee

AU - Choi, E. J.

PY - 2014/1/13

Y1 - 2014/1/13

N2 - We have performed optical transmission, reflection, spectroscopic ellipsometry, and Hall effect measurements on the electron-doped La xBa1-xSnO3 (x = 0.04) transparent thin films. From the infrared Drude response and plasma frequency analysis we determine the effective mass of the conducting electron m* = 0.35m 0. In the visible-UV region the optical band gap shifts to high energy in (La,Ba)SnO3 by 0.18 eV compared with undoped BaSnO 3 which, in the context of the Burstein-Moss analysis, is consistent with the infrared-m*. m* of BaSnO3 is compared with other existing transparent conducting oxides (TCO), and implication on search for high-mobility TCO compounds is discussed.

AB - We have performed optical transmission, reflection, spectroscopic ellipsometry, and Hall effect measurements on the electron-doped La xBa1-xSnO3 (x = 0.04) transparent thin films. From the infrared Drude response and plasma frequency analysis we determine the effective mass of the conducting electron m* = 0.35m 0. In the visible-UV region the optical band gap shifts to high energy in (La,Ba)SnO3 by 0.18 eV compared with undoped BaSnO 3 which, in the context of the Burstein-Moss analysis, is consistent with the infrared-m*. m* of BaSnO3 is compared with other existing transparent conducting oxides (TCO), and implication on search for high-mobility TCO compounds is discussed.

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Infrared-optical spectroscopy of transparent conducting perovskite (La,Ba)SnO₃ thin films

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