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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 25 — Dec. 16, 2013
  • pp: 30674–30682

Low-temperature deposition of BaCuSF, a visible through mid-infrared p-type transparent conductor

J. A. Frantz, V. Q. Nguyen, A. J. Mäkinen, S. B. Qadri, J. D. Myers, and J. S. Sanghera  »View Author Affiliations

Optics Express, Vol. 21, Issue 25, pp. 30674-30682 (2013)

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Barium copper sulfur fluoride (BaCuSF) is a p-type transparent conductor (p-TC) that, when doped with potassium, exhibits exceptionally high conductivity. The results of a detailed optical and electronic characterization of BaCuSF thin films deposited at a substrate temperature of 100 °C are presented. X-ray diffractometry shows the presence of a cubic BaCuSF phase. Spectroscopic measurements demonstrate that the films transmit from the visible through the mid-infrared with a band gap of 1.8 eV. Hall measurements indicate that the material is a degenerate semiconductor. As deposited, the films exhibit conductivity at room temperature of approximately 260 S/cm – among the highest reported room temperature conductivities for p-TCs. After post-deposition treatment in water, their conductivity increases to as high as 800 S/cm, and their band gap is reduced to 1.5 eV. The potential for low temperature deposition of p-type films with high conductivity and optical transmittance makes BaCuSF promising for several applications including flexible electronics and photovoltaics.

© 2013 Optical Society of America

OCIS Codes
(310.1860) Thin films : Deposition and fabrication
(350.6050) Other areas of optics : Solar energy
(310.7005) Thin films : Transparent conductive coatings

ToC Category:
Thin Films

Original Manuscript: October 3, 2013
Revised Manuscript: November 14, 2013
Manuscript Accepted: November 15, 2013
Published: December 5, 2013

J. A. Frantz, V. Q. Nguyen, A. J. Mäkinen, S. B. Qadri, J. D. Myers, and J. S. Sanghera, "Low-temperature deposition of BaCuSF, a visible through mid-infrared p-type transparent conductor," Opt. Express 21, 30674-30682 (2013)

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