An Epitaxial Transparent Conducting Perovskite Oxide: Double-Doped SrTiO3

被引：52

作者：

Ravichandran, Jayakanth ^{[1
]}

Siemons, Wolter ^{[2
]}

Heijmerikx, Herman ^{[2
,3
]}

Huijben, Mark ^{[3
]}

Majumdar, Arun ^{[4
]}

Ramesh, Ramamoorthy ^{[2
,5
]}

机构：

[1] Univ Calif Berkeley, Appl Sci & Technol Grad Grp, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[3] Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands

[4] US DOE, Adv Res Projects Agcy, Washington, DC 20585 USA

[5] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

来源：

CHEMISTRY OF MATERIALS | 2010年 / 22卷 / 13期

关键词：

THIN-FILMS; STRONTIUM-TITANATE; TRANSPORT; DEFECTS;

D O I：

10.1021/cm1005604

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Epitaxial thin films of strontium titanate doped with different concentrations of lanthanum and oxygen vacancies were grown on LSAT substrates by pulsed laser deposition technique. Films grown with 5-15% La doping and a critical growth pressure of I 10 mTorr showed high transparency (> 70-95%) in the UV-visible range with a sheet resistance of 300-1000 Omega/square. With the aid of UV-visible spectroscopy and photoluminescence, we establish the presence of oxygen vacancies and the possible band structure, which is crucial for the transparent conducting nature of these films. This demonstration will enable development of various epitaxial oxide heterostructures for both realizing opto-electronic devices and understanding their intrinsic optical properties.

引用

页码：3983 / 3987

页数：5

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