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


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:
Divisions: College of Engineering & Physical Sciences > Aston Institute of Materials Research (AIMR)
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 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)
Publication ISSN: 1468-6996
Last Modified: 22 Feb 2024 08:09
Date Deposited: 19 Aug 2019 10:08
Full Text Link: http://www.tand ... 96.2016.1172024
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2016
Published Online Date: 2016-04-25
Accepted Date: 2016-03-25
Submitted Date: 2015-11-18
Authors: Liu, Yin
Gong, Yuxuan
Mellott, Nathan P.
Wang, Bu
Ye, Haitao (ORCID Profile 0000-0002-4005-4922)
Wu, Yiquan



Version: Published Version

License: Creative Commons Attribution

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