Synthesis And Photoluminescence Properties Of Eu3+-Doped Zro2 Hollow Spheres

Keywords

hollow spheres; phosphor; photoluminescence; ZrO :Eu 2 3+

Abstract

ZrO2:Eu3+ hollow spheres were successfully fabricated with the resin microspheres as the template. The sample characterizations were carried out by means of x-ray diffraction (XRD), scanning electron microscope (SEM), and photoluminescence spectra. XRD results revealed that Eu3+-doped samples were pure t-ZrO2 phase after being calcined at 873 K. SEM results exhibited that this Eu3+ doped ZrO2 was hollow spheres; the diameter and thickness of which were about 450 and 50 nm, respectively. Upon excitation at 394 nm, the orange-red emission bands at the wave length longer than 570 nm were from 5D0 → 7FJ (J = 1, 2) transitions. The asymmetry ratio of (5D0 → 7F2)/(5D0 → 7F1) intensity is about 1.61, 1.26, 1.42, 1.42, 1.40, and 1.38 for the Eu3+ concentration 0.4, 0.7, 1.0, 1.5, 2.0, and 2.5 mol%, respectively. These values suggest that the asymmetry ratio of Eu3+ ions is independent of the doping concentration. The optimal doping concentration of Eu3+ ions in ZrO2 is 1.5 mol%. According to Dexter's theory, the critical distance between Eu3+ ions for energy transfer was determined to be 16 Å.

Publication Date

12-10-2015

Publication Title

Journal of Materials Research

Volume

30

Issue

24

Number of Pages

3740-3745

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1557/jmr.2015.375

Socpus ID

84951760759 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84951760759

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