title: Luminescence of delafossite-type CuAlO2fibers with Eu substitution for Al cations.
abstract: CuAlO2has been examined as a potential luminescent material by substituting Eu for Al cations in the delafossite structure. CuAlO2:Eu3+nanofibers have been prepared via electrospinning for the ease of mitigating synthesis requirements and for future optoelectronics and emerging applications. Single-phase CuAlO2fibers could be obtained at a temperature of 1100 °C in air. The Eu was successfully doped in the delafossite structure and two strong emission bands at ~405 and 610 nm were observed in the photoluminescence spectra. These bands are due to the intrinsic near-band-edge transition of CuAlO2and the f-f transition of the Eu3+activator, respectively. Further electrical characterization indicated that these fibers exhibit semiconducting behavior and the introduction of Eu could act as band-edge modifiers, thus changing the thermal activation energies. In light of this study, CuAlO2:Eu3+fibers with both strong photoluminescence and p-type conductivity could be produced by tailoring the rare earth doping concentrations.
authors.affiliation: New York State College of Ceramics, Alfred University , Alfred , NY , USA.
authors.forename: Yin
authors.initials: Y
authors.lastname: Liu
authors.affiliation: New York State College of Ceramics, Alfred University , Alfred , NY , USA.
authors.forename: Yuxuan
authors.initials: Y
authors.lastname: Gong
authors.affiliation: New York State College of Ceramics, Alfred University , Alfred , NY , USA.
authors.forename: Nathan P
authors.initials: NP
authors.lastname: Mellott
authors.affiliation: New York State College of Ceramics, Alfred University , Alfred , NY , USA.
authors.forename: Bu
authors.initials: B
authors.lastname: Wang
authors.affiliation: School of Engineering and Applied Science, Aston University , Birmingham , UK.
authors.forename: Haitao
authors.initials: H
authors.lastname: Ye
authors.affiliation: New York State College of Ceramics, Alfred University , Alfred , NY , USA.
authors.forename: Yiquan
authors.initials: Y
authors.lastname: Wu
keywords: 100 Materials; 105 Low-Dimension (1D/2D) materials; 200 Applications; 204 Optics / Optical applications; 40 Optical; CuAlO2; electrospinning; luminescent materials; magnetic and electronic device materials