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

Ewelina A. Wolska 1Jarosław Kaszewski 1Bartłomiej S. Witkowski 1Łukasz Wachnicki 1Marek Godlewski 1,2

1. Instytut Fizyki PAN, Al. Lotnikow 32/46, Warszawa 02668, Poland
2. Cardinal Stefan Wyszynski University, College of Science, Deptartment of Mathematics and Natural Sciences, Warszawa, Poland


Despite the concentrated research of ZnO, this material still has several new opportunities for biological and medical applications as luminescence markers and drug delivery systems, and optoelectronic applications as a phosphor material.


Several systems are studied for above applications. Lately, interest focused on properties of rare-earth (RE) doped nanoparticles. This relates to their attractive light emission properties – mainly due to observation sharp atomic-like 4f-4f emission lines.


The main limitation for a wider use of RE doped materials is difficulty of 4f-4f excitation

upon a host lattice excitation. This is why 4f-5d or charge transfer excitations are used,

limiting selection of host materials.


In some cases this problem can be avoided by using codoped oxide nanoparticles. In the

present work we report that ZnO nanoparticles doped with selected RE ions, such as: Pr, Tb,Eu and codoped with Al show efficient 4f-4f emission excited upon host excitation. This makes this system very attractive for different above-mentioned applications. Detail results are shown for Eu doped nanoparticles. Based on photoluminescence investigations the chromaticity diagrams are also calculated.


In this work we analyze optical properties of ZnO:10%Eu nanopowders obtained by a hydrothermal method. Effects of annealing on CL and PL spectra is investigated. The observed CL and PL changes are related to the reduction of OH-groups on the surface of annealed samples. Typical Eu 3+ emissions, related to 5D0 to 7F1, 7F2, 7F3 and 7F4, transitions, are detected for ZnO:10%Eu nanopowder only after annealing at 750oC. Chromaticity parameters of the emission are calculated.

The research was partially supported by the National Science Centre project 20/0139/N/ST3/04189

Legal notice
  • Legal notice:

    Copyright (c) Pielaszek Research, all rights reserved.
    The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
    In every case, proper references including Author(s) name(s) and URL of this webpage: must be provided.


Related papers
  1. Nanoparticles for medical imaging 
  2. Microwave conductivity of ZnO:Co and ZnO:Cu thin films with nano-size metallic Co/Cu inclusions.
  3. Tb3+ ion luminescence enhancement in yttria host lattice obtained via microwave hydrothermal process
  4. Quantum semiconductor nanostructures for applications in biology and medicine -development and commercialisation of new generation devices for molecular diagnostics on the basis of new Polish semiconductor devices
  5. Hydrothermal growth of ZnO nanorods for solar cells applications
  6. Epitaxial growth and characterization of zinc oxide nanorods obtained by the hydro-thermal method
  7. Growth of zinc oxide and dielectric films using Atomic Layer Deposition method from organic precursors
  8. Rezonansowe badania fotoemisyjne ferromagnetycznych warstw ZnCoO
  9. Resonant photoemission study of Sm atoms on ZnO surface
  10. Mangan w warstwach ZnMnO hodowanych metodą osadzania warstw atomowych
  11. Lokalne otoczenie atomów kobaltu w cienkich warstwach ZnCoO
  12. ZrO2:Tb nanopowders obtained by coprecipitation method
  13. Contactless electroreflectance of ZnSe layers grown by atomic layer epitaxy
  14. ZnFe2O4/ZnO core-shell particles obtained by coprecipitation route
  15. Electrical and optical properties of zinc oxide layers obtained by Atomic Layer Deposition
  16. Zinc oxide grown by Atomic Layer Deposition - a material for novel 3D electronics
  17. Dimethylzinc and diethylzinc as precursors for monocrystalline zinc oxide grown by Atomic Layer Deposition
  18. Thin films of ZnS and ZnSe by Atomic Layer Deposition for light sensor applications
  19. Photovoltaic cells based on nickel phthalocyanine and zinc oxide formed by atomic layer deposition
  20. Effects related to deposition temperature of ZnCoO films grown by Atomic Layer Deposition – uniformity of Co distribution, structural, electric and magnetic properties
  21. Comparison of Au/ZrO2 materials prepared by precipitation and impregnation methods
  22. Effect of annealing on the structure and microstructure of Pr doped ZrO2-Y2O3 nanocrystals
  23. Synthesis of doped ZnO nanopowders in microwave hydrothermal reactors
  24. Synthesis of Al doped ZnO nanopowders and their enhanced luminescence
  25. How we can stimulate intra-shell emissions of rare earth and transition metal ions in thin films and in nanoparticles
  26. ZnO thin films for organic/inorganic heterojunctions
  27. Combining microwave and pressure techniques for hydrothermal synthesis of ZnO and ZrO2 nanopowders doped with a range of metal ions
  28. Luminescence properties of zinc oxide nanopowders doped with Al ions obtained by the hydrothermal and vapour condensation methods.
  29. Wide band-gap II-VI semiconductors for optoelectronic applications
  30. Low temperature ZnMnO by ALD
  31. ZnMnO Films grown by Atomic Layer Deposition with uniform Mn distribution
  32. Effect of annealing on electrical properties of low temperature ZnO films
  33. Doping of ZnO nanopowders with Mn, Ni and Cr In an ultrasound and microwave driver hydrothermal reaction
  34. Time-resolved ODMR investigations of II-VI based DMS heterostructures
  35. Method of Manganese co-doping of LT ZnO films
  36. Photoluminescence of ZnO films studied by femptosecond sapphire:Ti laser
  37. Two color spectroscopy of ZnSe:Cr
  38. Photo-EPR studies of charge tunneling processes in CdxZn(1-x)Se:Fe,Cr (0 ≤ x ≤ 0.3) crystals
  39. Luminescence of CdMnTe Crystals in Magnetic Field
  40. Luminescence of doped nanoparticles of wide band gap II-VI compounds
  41. Doping of ZnO nanopowders with Mn and Cr in an ultrasound and microwave driven hydrothermal reaction
  42. Growth and characterization of thin films of ZnO by Atomic Layer Epitaxy
  43. Dynamics of spin interactions in II-Mn-VI semiconductors studied with time-resolved optically detected magnetic resonance
  44. Influence of n-type doping on light emission properties of GaN layers and GaN-based quantum well structures
  45. Fe photoionization transition in ZnSSe:Fe crystals - photo-ESR studies
  46. In-depth and in-plane profiling of InGaN-based laser diodes and heterostructures
  47. Cathodoluminescence study of n-type doped GaN epilayers and GaN/InGaN quantum well structures
  48. Compensation mechanisms in magnesium doped GaN
  49. Optical and magnetic resonance investigations of ZnO crystals doped with transition metal ions
  50. Optical and ODMR study of GaN-based HEMT structures
  51. Photo-ESR and optical studies of Cr photoionization transition in CdZnSe:Cr crystals
  52. Luminescent properties of wide bandgap materials at room temperature

Presentation: Poster at Nano PL 2014, Symposium A, by Ewelina A. Wolska
See On-line Journal of Nano PL 2014

Submitted: 2014-08-18 12:58
Revised:   2014-08-18 12:58
© 1998-2021 pielaszek research, all rights reserved Powered by the Conference Engine