Photoluminescence properties of SrZrO3:Eu3+ and BaZrO3:Eu3+ phosphors with perovskite structure

doi:10.1016/j.jallcom.2009.07.153

Journal of Alloys and Compounds

Volume 487, Issues 1–2, 13 November 2009, Pages L5-L7

https://doi.org/10.1016/j.jallcom.2009.07.153 Get rights and content

Abstract

Sr_1−xEu_xZrO₃ and BaZr_1−xEu_xO₃ phosphors with different Eu³⁺-doped contents were synthesized by solid-state reaction. Their microstructure and photoluminescence properties were analyzed by X-ray techniques (XRD) and photoluminescence spectroscopy (PL), respectively. XRD results showed that SrZrO₃:Eu³⁺ and BaZrO₃:Eu³⁺ perovskites belonged to orthorhombic and cubic structure, respectively. PL spectra indicated that SrZrO₃:Eu³⁺ emitted reddish-orange light and Eu³⁺ ions occupied two sites in SrZrO₃ lattice; BaZrO₃:Eu³⁺ emitted orange light and Eu³⁺ ions occupied one site in BaZrO₃ lattice. In addition, the optimal Eu³⁺-doped contents of Sr_1−xEu_xZrO₃ and BaZr_1−xEu_xO₃ phosphors were both 3 mol%.

Introduction

The AZrO₃ (A = Sr, Ba) perovskites, as high temperature materials, have attracted considerable attention because of their potential applications in the field of electronic ceramics, superconductors and so on [1], [2]. Phosphors of rare earth ions doped perovskite-type oxides, such as SrHfO₃:Ce [3] and CaTiO₃:Pr [4] could be widely used in displays, X-ray phosphors, therefore, many researches focused on luminescent properties of these phosphors recently.

Eu³⁺ is a good activator ion with red or red-orange emission in many hosts, such as borates [5], niobates [6], tungstates and molybdates [7]. So far only limited information is available regarding Eu³⁺-doped AZrO₃ (A = Sr, Ba) phosphors [8], [9], [10]. In this paper, Sr_1−xEu_xZrO₃ and BaZr_1−xEu_xO₃ phosphors were successfully prepared by the traditional high temperature solid-state reaction. The luminescence properties and the effects of Eu³⁺-doped content on PL of SrZrO₃ and BaZrO₃ were also studied. The results of this work could serve as supplementary to the previous work and make the Eu³⁺-doped AZrO₃ (A = Sr, Ba) system more integrated.

Section snippets

Experimental

Both SrZrO₃:Eu³⁺ and BaZrO₃:Eu³⁺ phosphors were prepared by high temperature solid-state reaction. Stoichiometric amounts of Eu₂O₃ (99.99%), SrCO₃ (A.R.), BaCO₃ (A.R.) and ZrO₂ (A.R.) were accurately weighed, mixed and then grounded in an agate mortar. The mixture was calcined at 1400 °C for 5 h in air.

Powder X-ray diffraction (XRD, 40 kV and 30 mA, Cu Kα = 1.5406 Å Rigaku/Dmax-2500X) was used to identify the structure of the products. Excitation and emission spectra were recorded using a Hitachi

Results and discussion

Fig. 1 presents the XRD patterns of (a) Sr_0.95ZrO₃:Eu_0.05³⁺ and (b) BaZr_0.95O₃:Eu_0.05³⁺ powders, respectively. The position and intensity of diffraction peaks of the two samples are consistent with those of standard powder diffraction file JCPDS 44-0161 (SrZrO₃) and JCPDS 06-0399 (BaZrO₃), and no phases as Eu₂O₃ and Eu₂Zr₂O₇ were detected, which indicated that the samples had pure phase. A small amount of Eu³⁺ doped did not change the lattice of the powder. XRD data showed that SrZrO₃ and BaZrO₃

Conclusion

Eu³⁺-doped SrZrO₃ and BaZrO₃ phosphors were successfully synthesized by solid-state reaction. The optimum Eu³⁺-doped contents of Sr_1−xEu_xZrO₃ and BaZr_1−xEu_xO₃ powders were both 3 mol%. Based on the PL spectra, Eu³⁺ might substitute Sr²⁺ and Zr⁴⁺ sites in SrZrO₃ host lattice and occupy one zirconium site in BaZrO₃. The CIE coordinate values of SrZrO₃:Eu³⁺ and BaZrO₃:Eu³⁺ indicated that the former phosphor can emit reddish-orange light and the latter can emit orange light, which induces that these

Acknowledgments

This work was financially supported by grants from the Science Foundation of Guangxi Province (0731014), Innovation Project of Guangxi Graduate Education, the large-scale instrument of Guangxi cooperates and shares the network (496-2007-075).

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Journal of Alloys and Compounds

Abstract

Introduction

Section snippets

Experimental

Results and discussion

Conclusion

Acknowledgments

References (15)

J. Koshy. Mater. Lett.

Ceram. Int.

Opt. Mater.

J. Alloys Compd.

J. Alloys Compd.

Physica B

Chem. Phys. Lett.

Cited by (79)

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Investigation on photoluminescence and Judd–Ofelt parameters in Eu ion-doped CaZrO<inf>3</inf> in relation to the local structural property

Color tunable orange-red light emitting Sm<sup>3+</sup> doped BaZrO<inf>3</inf> nanopowders: Photoluminescence properties for w-LED applications

LetterPhotoluminescence properties of SrZrO3:Eu3+ and BaZrO3:Eu3+ phosphors with perovskite structure

Abstract

Introduction

Section snippets

Experimental

Results and discussion

Conclusion

Acknowledgments

J. Koshy. Mater. Lett.

Ceram. Int.

Opt. Mater.

J. Alloys Compd.

J. Alloys Compd.

Physica B

Chem. Phys. Lett.

Letter
Photoluminescence properties of SrZrO₃:Eu³⁺ and BaZrO₃:Eu³⁺ phosphors with perovskite structure