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Gatsi, NC, Mujaji, M, Wamwangi, D and Jackson, RA (2020) Site-selective laser spectroscopy and defect configurations of the Nd3+-Li+ centres in ZnO powders. Journal of Alloys and Compounds, 817. 153306 - 153306. ISSN 0925-8388

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Abstract

Near-infrared emission in the 885–915 nm region was observed for two distinct Nd3+ centres that co-exist in hexagonal wurtzite ZnO:1 mol%Nd3+:10 mol%Li+ powders. The powder samples were prepared by sintering in air at 950 °C and the emission, attributed to the 4F3/2 → 4I9/2 transitions of Nd3+ ions, was measured in the 10–75 K temperature range. The sharp and well-resolved Nd3+ emission transitions are present in Nd3+-Li+ co-doped samples only, and the intensity increases with Li+ concentration. X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy were used for structural, morphology and compositional assessments of the samples. Atomistic modelling using GULP shows two favourable Nd3+-Li+ substitutional positions, in consistence with the experimental findings.

Item Type: Article
Additional Information: This is the accepted author manuscript (AAM). The final published version (version of record) is available online via Elsevier at https://doi.org/10.1016/j.jallcom.2019.153306 - please refer to any applicable terms of use of the publisher.
Uncontrolled Keywords: Site-selective spectroscopy; Nd3+-Li+; ZnO powders; Modelling; Defect configurations; Crystal-field levels
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Depositing User: Symplectic
Date Deposited: 16 Dec 2019 12:29
Last Modified: 06 Dec 2020 01:30
URI: https://eprints.keele.ac.uk/id/eprint/7413

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