The effect of annealing on properties of europium doped ZnO nanopowders obtained by a microwave hydrothermal method

•Typical Eu peaks in VIS spectral are detected for ZnO:Eu in PL and CL spectra only after annealing.•Luminescence intensity is changing after annealing procedure.•Luminescence intensity depends on pressure values during hydrothermal process.•ZnO band edge photoluminescence is only slightly enhanced...

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Bibliographic Details
Published inOptical materials Vol. 59; pp. 103 - 106
Main Authors Wolska-Kornio, E., Kaszewski, J., Witkowski, B.S., Wachnicki, Ł., Godlewski, M.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.09.2016
Subjects
Europium
Luminescence
Nanopowders
ZnO
ZnO
Nanopowders
Europium
Luminescence
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Summary:•Typical Eu peaks in VIS spectral are detected for ZnO:Eu in PL and CL spectra only after annealing.•Luminescence intensity is changing after annealing procedure.•Luminescence intensity depends on pressure values during hydrothermal process.•ZnO band edge photoluminescence is only slightly enhanced by an annealing procedure.•ZnO nanopowders photoluminescence results place in orange part of CIE diagram.•Annealing procedure does not change chromaticity parameters.•ZnO:Eu is successfully used as a biomarker. Europium doped ZnO nanopowders made by microwave hydrothermal method are investigated. As zinc oxide precursor zinc nitrate(V) hexahydrate (Zn(NO3)2·6H2O) was used. Two types of nanopowder samples are examined: as grown and annealed at 750°C in air atmosphere. We investigate the structural, morphological and optical prosperities of europium doped ZnO. Results of scanning electron microscopy, X-ray diffraction, photo- and cathodoluminescence investigations and also CIE1961 chromaticity diagram are presented.
ISSN:0925-3467
1873-1252
DOI:10.1016/j.optmat.2016.01.021