title: Low-temperature deposition of BaCuSF, a visible through mid-infrared p-type transparent conductor.
abstract: 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.
authors: J A
authors: JA
authors: Frantz
authors: V Q
authors: VQ
authors: Nguyen
authors: A J
authors: AJ
authors: Mäkinen
authors: S B
authors: SB
authors: Qadri
authors: J D
authors: JD
authors: Myers
authors: J S
authors: JS
authors: Sanghera