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Optimal composition of europium gallium oxide thin films for device applications

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Date
2010
Authors
Wellenius, P
Smith, ER
Leboeuf, SM
Everitt, HO
Muth, JF
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Abstract
Europium gallium oxide (EuxGa1-x)(2)O-3 thin films were deposited on sapphire substrates by pulsed laser deposition with varying Eu content from x=2.4 to 20 mol %. The optical and physical effects of high europium concentration on these thin films were studied using photoluminescence (PL) spectroscopy, x-ray diffraction (XRD), and Rutherford backscattering spectrometry. PL spectra demonstrate that emission due to the D-5(0) to F-7(J) transitions in Eu3+ grows linearly with Eu content up to 10 mol %. Time-resolved PL indicates decay parameters remain similar for films with up to 10 mol % Eu. At 20 mol %, however, PL intensity decreases substantially and PL decay accelerates, indicative of parasitic energy transfer processes. XRD shows films to be polycrystalline and beta-phase for low Eu compositions. Increasing Eu content beyond 5 mol % does not continue to modify the film structure and thus, changes in PL spectra and decay cannot be attributed to structural changes in the host. These data indicate the optimal doping for optoelectronic devices based on (EuxGa1-x)(2)O-3 thin films is between 5 and 10 mol %. (C) 2010 American Institute of Physics. [doi:10.1063/1.3319670]
Type
Journal article
Subject
eu-doped gan
electroluminescent
luminescence
phosphors
displays
eu2o3
physics, applied
Permalink
https://hdl.handle.net/10161/3324
Published Version (Please cite this version)
10.1063/1.3319670
Citation
Wellenius,P.;Smith,E. R.;LeBoeuf,S. M.;Everitt,H. O.;Muth,J. F.. 2010. Optimal composition of europium gallium oxide thin films for device applications. Journal of Applied Physics 107(10): 103111-103111.
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Scholars@Duke

Everitt

Henry Everitt

Adjunct Professor of Physics
Dr. Everitt is the Army's senior technologist (ST) for optical sciences, a senior executive currently working for the Army Research Laboratory in Houston, TX. Through his adjunct appointment in the Duke Physics Department, he leads an active experimental research group in molecular physics, novel terahertz imaging, nanophotonics, and ultrafast spectroscopy of wide bandage semiconductors with colleagues on campus and through an international network of collaborators. Four principal research
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