Luminescence response and CL degradation of combustion synthesized spherical SiO2:Ce nanophosphor

I. M. Nagpure; Shreyas S. Pitale; K. G. Tshabalala; Vinay Kumar; O. M. Ntwaeaborwa; J. J. Terblans; H. C. Swart

doi:10.1016/j.materresbull.2011.08.051

Luminescence response and CL degradation of combustion synthesized spherical SiO₂:Ce nanophosphor

I. M. Nagpure, Shreyas S. Pitale, K. G. Tshabalala, Vinay Kumar, O. M. Ntwaeaborwa, J. J. Terblans, H. C. Swart

University of The Free State

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

This study was aimed to systematically investigate the luminescence response of SiO₂:Ce³⁺ nanophosphors with different excitation sources. The powders were synthesized by using an urea assisted combustion method. SiO₂:Ce_1m% samples were also annealed at 1000 °C for 1 h in a charcoal environment to reduce incidental Ce ⁴⁺ to partial Ce³⁺ ions. High resolution transmission electron microscopy (HRTEM) images of the as synthesized and annealed powder samples confirmed that the particles were spherical and in the size range of 3-8 nm in diameter. X-ray diffraction (XRD) and electron dispersion spectroscopy (EDS) results showed that the SiO₂ was crystalline and pure. Diffused reflectance, photoluminescence (PL) and cathodoluminescence (CL) results of the SiO₂:Ce³⁺ samples were obtained and compared with each other. The CL degradation and the surface reactions on the surface of the SiO₂:Ce³⁺ were studied with X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES). A clear improvement in the chemical stability of the SiO₂:Ce³⁺ annealed at 1000 °C were obtained.

Original language	English
Pages (from-to)	2359-2366
Number of pages	8
Journal	Materials Research Bulletin
Volume	46
Issue number	12
DOIs	https://doi.org/10.1016/j.materresbull.2011.08.051
Publication status	Published - Dec 2011
Externally published	Yes

Keywords

A. Nanostructures
A. Optical materials
C. Photoelectron spectroscopy
C. X-ray diffraction
D. Luminescence
D. Surface properties

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.materresbull.2011.08.051

Cite this

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title = "Luminescence response and CL degradation of combustion synthesized spherical SiO2:Ce nanophosphor",

abstract = "This study was aimed to systematically investigate the luminescence response of SiO2:Ce3+ nanophosphors with different excitation sources. The powders were synthesized by using an urea assisted combustion method. SiO2:Ce1m% samples were also annealed at 1000 °C for 1 h in a charcoal environment to reduce incidental Ce 4+ to partial Ce3+ ions. High resolution transmission electron microscopy (HRTEM) images of the as synthesized and annealed powder samples confirmed that the particles were spherical and in the size range of 3-8 nm in diameter. X-ray diffraction (XRD) and electron dispersion spectroscopy (EDS) results showed that the SiO2 was crystalline and pure. Diffused reflectance, photoluminescence (PL) and cathodoluminescence (CL) results of the SiO2:Ce3+ samples were obtained and compared with each other. The CL degradation and the surface reactions on the surface of the SiO2:Ce3+ were studied with X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES). A clear improvement in the chemical stability of the SiO2:Ce3+ annealed at 1000 °C were obtained.",

keywords = "A. Nanostructures, A. Optical materials, C. Photoelectron spectroscopy, C. X-ray diffraction, D. Luminescence, D. Surface properties",

author = "Nagpure, {I. M.} and Pitale, {Shreyas S.} and Tshabalala, {K. G.} and Vinay Kumar and Ntwaeaborwa, {O. M.} and Terblans, {J. J.} and Swart, {H. C.}",

year = "2011",

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AU - Nagpure, I. M.

AU - Pitale, Shreyas S.

AU - Tshabalala, K. G.

AU - Kumar, Vinay

AU - Ntwaeaborwa, O. M.

AU - Terblans, J. J.

AU - Swart, H. C.

PY - 2011/12

Y1 - 2011/12

N2 - This study was aimed to systematically investigate the luminescence response of SiO2:Ce3+ nanophosphors with different excitation sources. The powders were synthesized by using an urea assisted combustion method. SiO2:Ce1m% samples were also annealed at 1000 °C for 1 h in a charcoal environment to reduce incidental Ce 4+ to partial Ce3+ ions. High resolution transmission electron microscopy (HRTEM) images of the as synthesized and annealed powder samples confirmed that the particles were spherical and in the size range of 3-8 nm in diameter. X-ray diffraction (XRD) and electron dispersion spectroscopy (EDS) results showed that the SiO2 was crystalline and pure. Diffused reflectance, photoluminescence (PL) and cathodoluminescence (CL) results of the SiO2:Ce3+ samples were obtained and compared with each other. The CL degradation and the surface reactions on the surface of the SiO2:Ce3+ were studied with X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES). A clear improvement in the chemical stability of the SiO2:Ce3+ annealed at 1000 °C were obtained.

AB - This study was aimed to systematically investigate the luminescence response of SiO2:Ce3+ nanophosphors with different excitation sources. The powders were synthesized by using an urea assisted combustion method. SiO2:Ce1m% samples were also annealed at 1000 °C for 1 h in a charcoal environment to reduce incidental Ce 4+ to partial Ce3+ ions. High resolution transmission electron microscopy (HRTEM) images of the as synthesized and annealed powder samples confirmed that the particles were spherical and in the size range of 3-8 nm in diameter. X-ray diffraction (XRD) and electron dispersion spectroscopy (EDS) results showed that the SiO2 was crystalline and pure. Diffused reflectance, photoluminescence (PL) and cathodoluminescence (CL) results of the SiO2:Ce3+ samples were obtained and compared with each other. The CL degradation and the surface reactions on the surface of the SiO2:Ce3+ were studied with X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES). A clear improvement in the chemical stability of the SiO2:Ce3+ annealed at 1000 °C were obtained.

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