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The evolution and role of NH4Cl flux used to synthesize double perovskite BaLaMgSbO6: a potential red phosphor for white LEDs

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Abstract

Eu3+ ions activated BaLaMgSbO6 phosphors were successfully synthesized by the solid-state reaction method using NH4Cl as the flux. The BaCl2 was selected to substitute BaCO3 as the starting material to attest that NH4Cl not only reacted with BaCO3 but also reacted with other starting materials. The analysis of TG/DSC was used to probe the role of NH4Cl flux in the process of synthesizing BaLaMgSbO6 powders. The crystal structure was investigated by XRD and Rietveld refinement, and the morphology by SEM. The phosphors had monoclinic double perovskite structure with the space group P21, as well as the rock-salt ordering of B-site. The luminescence properties, including the photoluminescence excitation and emission spectra, and the color coordinates were investigated. Also, the relationship between the crystalline size and the emission intensity were discussed. With increasing the calcination temperature, both the crystalline size and the emission intensity monotonously increased. The relative intensity ratio of red/orange emission was used to measure the degree of distortion from the inversion symmetry of the local environment of the Eu3+ ions in BaLaMgSbO6.

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Acknowledgements

The authors acknowledge the generous financial support from Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) and National Natural Science Foundation of China (51402133, 51202111).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, China

    Quan Liu, Lixi Wang, Xibing Li, Lingfen Miao & Qitu Zhang

  2. Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing, 210009, China

    Quan Liu, Lixi Wang, Xibing Li, Lingfen Miao & Qitu Zhang

  3. Institute 53 of China’s Ordnance Industry, Jinan, 250031, Shandong, China

    Mingxun Yu

  4. Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou, 221116, China

    Le Zhang

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  1. Quan Liu
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  2. Lixi Wang
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  3. Xibing Li
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  4. Lingfen Miao
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  7. Le Zhang
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Correspondence to Qitu Zhang or Le Zhang.

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Liu, Q., Wang, L., Li, X. et al. The evolution and role of NH4Cl flux used to synthesize double perovskite BaLaMgSbO6: a potential red phosphor for white LEDs. J Mater Sci: Mater Electron 28, 5352–5359 (2017). https://doi.org/10.1007/s10854-016-6194-6

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  • DOI: https://doi.org/10.1007/s10854-016-6194-6

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