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Near-UV-excited Dy3+-doped calcium borophosphate (CBP) phosphors for white LED applications

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Abstract

Calcium borophosphate (CBP) phosphors doped with Dy3+ were synthesized by solid-state reaction method. These phosphors were characterized by photoluminescence spectra and decay curves in the visible region. These phosphors were excited at 350 nm, and emission spectra were studied. Decay curves were obtained for the transition, 4F9/2 → 6H13/2 of Dy3+, and lifetimes were measured for different concentrations of Dy3+ ions. CIE chromaticity coordinates were obtained for these Dy3+-doped CBP phosphors. Correlated color temperature was also calculated using the standard formula.

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Acknowledgements

One of the authors Y.C. Ratnakaram expresses his thanks to University Grants Commission (UGC), New Delhi, for the sanction of Mid Carrier Award. One of the authors V. Reddy Prasad expresses his thanks to University Grants Commission (UGC), New Delhi, for the sanction of SRF under Rajiv Gandhi National Fellowship (RGNF).

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Correspondence to V. Reddy Prasad.

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Reddy Prasad, V., Damodaraiah, S., Ratnakaram, Y.C. et al. Near-UV-excited Dy3+-doped calcium borophosphate (CBP) phosphors for white LED applications. Indian J Phys (2020). https://doi.org/10.1007/s12648-019-01671-9

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Keywords

  • Solid-state reaction
  • Photoluminescence
  • Concentration quenching
  • Decay lifetimes
  • CIE coordinates
  • White light

PACS Nos.

  • 71.20.Eh
  • 32.30.Jc
  • 78.55.Qr