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首页> 中文期刊> 《物理化学学报》 >Preparation and Luminescence Properties of MZrO3:Eu3+, A (M=Ca2+, Ba2+; A=Li+, Na+, K+) Phosphors with Perovskite Structure

Preparation and Luminescence Properties of MZrO3:Eu3+, A (M=Ca2+, Ba2+; A=Li+, Na+, K+) Phosphors with Perovskite Structure

         
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摘要

Calcium and barium zirconate powders based upon CaZrO3:Eu3+, A and BaZrO3:Eu3+, A (A=Li+, Na+, K+) were prepared by combustion synthesis method and heating to ~1000 °C to improve crystal inity. The structure and morphology of materials were examined by X-ray diffraction (XRD) and scanning electron microscopy (SEM). XRD results showed that CaZrO3:Eu3 +, A and BaZrO3:Eu3 +, A (A=Li +, Na +, K +) perovskites possessed orthorhombic and cubic structures, respectively. The morphologies of al powders were very similar consisting of smal , coagulated, cubical particles with narrow size distributions and smooth and regular surfaces. The characteristic luminescences of Eu3+ ions in CaZrO3:Eu3+, A (A=Li+, Na+, K+) lattices were present with strong emissions at 614 and 625 nm for 5D0→7F2 transitions with other weaker emissions observed at 575, 592, 655, and 701 nm corresponding to 5D0→7Fn transitions (where n=0, 1, 3, 4, respectively). In BaZrO3:Eu3 + both the 5D0→7F1 and 5D0→7F2 transitions at 595 and 613 nm were strong. Photoluminescence intensities of CaZrO3:Eu3+ samples were higher than those of BaZrO3:Eu3+ lattices. This remarkable increase of photoluminescence intensity (corresponding to 5D0→7Fn transitions) was observed in CaZrO3:Eu3 + and BaZrO3:Eu3 + if co-doped with Li + ions. An additional broad band composed of many peaks between 440 to 575 nm was observed in BaZrO3:Eu3 +, A samples. The intensity of this band was greatest in Li+ co-doped samples and lowest for K+ doped samples.

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  • 来源
    《物理化学学报》 |2013年第6期|1357-1362|共6页
  • 作者

    MAR B; CEMBRERO-COCA P; SINGH K C; KAUSHIK R D; OM Hari;

  • 作者单位

    Institut de Disseny per la Fabricació Automatitzada IDF-Departament de Física Aplicada, Universitat Politècnica de València, Camí de Vera s/n, 46022 València, Spain;

    Institut de Disseny per la Fabricació Automatitzada IDF-Departament de Física Aplicada, Universitat Politècnica de València, Camí de Vera s/n, 46022 València, Spain;

    Department of Chemistry, Maharshi Dayanand University, Rohtak 124001, Haryana, India;

    Department of Chemistry, Gurukul Kangari University, Haridwar-249404, Uttarakhand, India;

    Department of Chemistry, Maharshi Dayanand University, Rohtak 124001, Haryana, India;

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