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Title: Optical and electronic properties of delafossite CuBO{sub 2}p-type transparent conducting oxide

CuBO{sub 2} delafossite was prepared by solid state reaction and calcined/sintered at 1005 °C. The optical properties of this p-type transparent conducting oxide were investigated. Its crystal structure, morphology, composition, oxygen decomposition, and optical and electronic properties were characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, thermal gravimetric analysis (TGA), ultraviolet-visible-near-infrared (UV-VIS-NIR) and fluorescence spectroscopies, Seebeck coefficient, and electrical conductivity measurements. CuBO{sub 2} delafossite possesses a hexagonal space group R3{sup ¯}m. TGA indicated a weight loss of 10%, which was attributed to excess oxygen. The positive Seebeck coefficient confirmed p-type behavior. Emission at 355 nm indicated a direct band type transition, and the UV-VIS-NIR spectrum indicated an optical direct gap of 3.6 eV. Activation energies for carrier production and electrical conduction were 0.147 and 0.58 eV, respectively, indicating the thermal activation of carriers. CuBO{sub 2} delafossite is a p-type transparent conducting oxide with a wide band gap and may have potential in industrial p-type electrodes.
Authors:
 [1]
  1. Department of Physics, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Ladkrabang, Bangkok 10520 (Thailand)
Publication Date:
OSTI Identifier:
22303578
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 11; Other Information: (c) 2013 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ACTIVATION ENERGY; BROMATES; CARRIERS; COPPER COMPOUNDS; CRYSTAL STRUCTURE; DECOMPOSITION; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; EMISSION; FLUORESCENCE SPECTROSCOPY; OPACITY; OPTICAL PROPERTIES; OXIDES; OXYGEN; SCANNING ELECTRON MICROSCOPY; SPACE GROUPS; THERMAL GRAVIMETRIC ANALYSIS; ULTRAVIOLET RADIATION; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY