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Applied Physics A

, 125:158 | Cite as

Epitaxial Co doped BaSnO3 thin films with tunable optical bandgap on MgO substrate

  • Dong-Sheng Gao
  • Xiang-Dong GaoEmail author
  • Yong-Qing Wu
  • Tong-Tong Zhang
  • Jing-Nan Yang
  • Xiao-Min Li
Article
  • 14 Downloads

Abstract

Co doped BaSnO3 films [BaSn1 − xCoxO3(0 ≤ x ≤ 0.50), i.e., BSCO] have been grown on MgO single-crystal substrates via pulsed laser deposition. Effects of the Co-doping level on the crystallinity, the microstructure, and optical properties of the BSCO films are investigated. All the BSCO films are of high crystallinity and grown epitaxially on MgO substrates. The lattice parameter of the (200) plane drops linearly with the increase of the ‘x’ value. The Co doping is found to increase the film roughness and the grain size, and a RMS roughness of 8.33 nm and grain size up to 100 nm are observed in the film with x = 0.50. The low Co-doping level (x = 0.05, 0.1) has slight anti-reflection effects on the incident visible light, and the Co-doping level higher than 0.2 reduces the optical transmittance significantly. The optical bandgap shows a first-rising then falling trend with the increase of the Co content, and the lowest bandgap of 1.94 eV is realized in the BSCO film with x = 0.50.

Notes

Acknowledgements

Thank to the financial support from National Key R&D Program of China (2016YFA0201103), National Natural Science Foundation of China (51572281), and Basic Research Foundation of Shanghai, China (15JC1403600).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of CeramicsChinese Academy of ScienceShanghaiPeople’s Republic of China
  2. 2.Suzhou Research Center, Shanghai Institute of CeramicsChinese Academy of ScienceTaicangPeople’s Republic of China
  3. 3.University of Chinese Academy of ScienceBeijingPeople’s Republic of China

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