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Optical properties of Eu3+ activated SrLa2O4 red-emitting phosphors for WLED applications

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Abstract

The SrLa2−xO4:xEu3+ phosphors are synthesized through high-temperature solid-state reaction method at 1473 K with various doping concentration. Their phase structures, absorption spectra, and luminescence properties are investigated by X-ray diffraction (XRD), UV–Vis spectrophotometer and photoluminescence spectrometry. The intense absorption of SrLa2−xO4:xEu3+ phosphors have occurred around 400 nm. The prominent luminescence spectra of the prepared phosphors exhibited bright red emission at 626 nm. The doping concentration 0.12 mol% of Eu3+ is shown to be optimal for prominent red emission and chromaticity coordinates are x = 0.692, y = 0.3072. Considering the high colour purity and appropriate emission intensity of Eu3+ doped SrLa2O4 can be used as red phosphors for white light emitting diodes (WLEDs).

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Acknowledgements

The authors gratefully acknowledge DST-SERB, India for granting financial support for the project ref-SR/S2/CMP/117/2012, PDF/2015/001072 and SSN management for giving junior research fellowship.

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Authors and Affiliations

  1. Center for Radiation Environmental Science and Technology, SSN College of Engineering, Kalavakkam, India

    Rajesh Narayana Perumal & G. Subalakshmi

  2. Department of Physics, SSN College of Engineering, Kalavakkam, 603 110, India

    Rajesh Narayana Perumal & G. Subalakshmi

  3. Research & Innovation Centre, DRDO, IIT Madras, Chennai, 600 113, India

    E. Varadarajan

  4. Department of Medical Physics, School of Physics, Bharathidasan University, Tiruchirappalli, 620024, India

    S. Sadhasivam

  5. Department of Physics, VIT University, Chennai, India

    G. Vinitha

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  1. Rajesh Narayana Perumal
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Correspondence to Rajesh Narayana Perumal.

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Perumal, R.N., Subalakshmi, G., Varadarajan, E. et al. Optical properties of Eu3+ activated SrLa2O4 red-emitting phosphors for WLED applications. J Mater Sci: Mater Electron 29, 2638–2644 (2018). https://doi.org/10.1007/s10854-017-8189-3

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  • DOI: https://doi.org/10.1007/s10854-017-8189-3

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