Luminescence of delafossite-type CuAlO2 fibers with Eu substitution for Al cations

Liu, Yin, Gong, Yuxuan, Mellott, Nathan P., Wang, Bu, Ye, Haitao and Wu, Yiquan (2016). Luminescence of delafossite-type CuAlO2 fibers with Eu substitution for Al cations. Science and Technology of Advanced Materials, 17 (1), pp. 200-209.

Abstract

CuAlO2 has 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 CuAlO2 fibers 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 CuAlO2 and 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.

Publication DOI: https://doi.org/10.1080/14686996.2016.1172024
Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Engineering & Applied Sciences > Polymer and advanced materials research group
Additional Information: © 2016 The author(s). Published by national institute for Materials Science in partnership with Taylor & Francis.This is an open access article distributed under the terms of the creative commons attribution license CC-By http://creativecommons.org/licenses/by/4.0/which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Funding: US Air Force Office of Scientific Research (contract FA9550-14-1-0155); and FP7 Marie Curie Action (project No: 295208)
Uncontrolled Keywords: CuAlO,electrospinning,luminescent materials,Materials Science(all)
Full Text Link: http://www.tand ... 96.2016.1172024
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2016
Authors: Liu, Yin
Gong, Yuxuan
Mellott, Nathan P.
Wang, Bu
Ye, Haitao ( 0000-0002-4005-4922)
Wu, Yiquan

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