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White Light Emission Through Downconversion of Terbium and Europium Doped CeF3 Nanophosphors

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Abstract

CeF3 nanophosphors have been extensively investigated in recent years for lighting and numerous bio-applications. Downconversion emissions in CeF3:Eu3+/Tb3+ phosphors were studied with the objective of attaining a white light emitting composition, by means of a simple co-precipitation method. The material was characterized by X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM), Fourier Transform Infrared Spectroscopy (FT-IR) and Photoluminescence (PL). Uniformly distributed nanoparticles were obtained with an average particle size range of 8–10 nm. Various studies were undertook utilizing different doping concentrations and respective fluorescence studies were carried out to optimize dopant concentrations while achieving maximum luminescence intensity. From PL results, it was observed that the efficient energy transfers from the donor to the acceptor ions. Different concentrations of Tb3+, Eu3+ were doped in order to achieve a white light emitting phosphor for UV-based Light Emitting Diodes (LEDs). The nanoparticles showed characteristic emission of respective dopants (Eu3+, Tb3+) when excited at the 4f → 5d transition of Ce3+. The chromaticity coordinates for CeF3 doped with Eu3+ and Tb3+ were calculated and an emission very close to white light was observed.

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Acknowledgments

The authors acknowledge Centre for Research in Nanotechnology and Science (CRNTS) and Sophisticated Analytical Instrument Facility (SAIF), Indian Institute of Technology Bombay, Powai for providing the facility and support.

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Authors and Affiliations

  1. Amity Institute of Nanotechnology, Amity University, Noida, UP, 201313, India

    S Varun & Mohit Kalra

  2. Centre for Research in Nanotechnology & Science (CRNTS), Indian Institute of Technology, Powai, Mumbai, 400076, India

    Mayuri Gandhi

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  1. S Varun
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  2. Mohit Kalra
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  3. Mayuri Gandhi
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Correspondence to Mayuri Gandhi.

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Varun, S., Kalra, M. & Gandhi, M. White Light Emission Through Downconversion of Terbium and Europium Doped CeF3 Nanophosphors. J Fluoresc 25, 1501–1505 (2015). https://doi.org/10.1007/s10895-015-1641-y

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  • DOI: https://doi.org/10.1007/s10895-015-1641-y

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