Physical and optical studies of Gd2O2S:Eu3+ nanophosphors by microwave irradiation and γ-irradiation methods

Sapizah Rahim, Muhammad Taqiyuddin Mawardi Ayob, Muhammad Hassyakirin Hasim, Irman Abdul Rahman, Shahidan Radiman

Research output: Contribution to journalArticle

Abstract

Gd2O2S:Eu3+ nanophosphors have been successfully synthesized using microwave irradiation and γ-irradiation methods with polyvinyl pyrrolidone as a stabilizer. The physical and luminescence spectra were compared. The morphologies of both Gd2O2S:Eu3+ nanophosphors were in the hexagonal phase and mainly consisted of spherical nanostructures with diameters of ~90 nm and ~50 nm for both microwave irradiation and γ-irradiation methods. Upon 325 nm of ultraviolet (UV) light excitation, strong red emissions (626 nm) were observed for both methods; these emissions corresponded to the 5D07F2 transition of Eu3+ ions. However, Gd2O2S:Eu3+ nanophosphors following microwave treatment showed better luminescence intensity than Gd2O2S:Eu3+ nanophosphors treated with γ-irradiation. This difference was attributed to the crystallinity phase and surface quenching effects of Gd2O2S:Eu3+ nanophosphors. The reaction mechanisms of Gd2O2S:Eu3+ nanophosphors in both methods are discussed in detail.

Original languageEnglish
JournalLuminescence
DOIs
Publication statusPublished - 1 Jan 2019

Fingerprint

Microwave irradiation
Microwaves
Irradiation
Luminescence
Polyvinyls
Pyrrolidinones
Nanostructures
Ultraviolet Rays
gadolinium sulfoxylate
Quenching
Ions

Keywords

  • microwave
  • nanophosphors
  • optical and physical
  • γ-irradiation

ASJC Scopus subject areas

  • Biophysics
  • Chemistry (miscellaneous)

Cite this

Physical and optical studies of Gd2O2S:Eu3+ nanophosphors by microwave irradiation and γ-irradiation methods. / Rahim, Sapizah; Ayob, Muhammad Taqiyuddin Mawardi; Hasim, Muhammad Hassyakirin; Abdul Rahman, Irman; Radiman, Shahidan.

In: Luminescence, 01.01.2019.

Research output: Contribution to journalArticle

Rahim, Sapizah ; Ayob, Muhammad Taqiyuddin Mawardi ; Hasim, Muhammad Hassyakirin ; Abdul Rahman, Irman ; Radiman, Shahidan. / Physical and optical studies of Gd2O2S:Eu3+ nanophosphors by microwave irradiation and γ-irradiation methods. In: Luminescence. 2019.
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