Synthesis and photoluminescence study of a single dopant near white light emitting Li4CaB2O6:Dy3+nanophosphor

Neharika, Vinay Kumar, Vivek K. Singh, J. Sharma, O. M. Ntwaeaborwa, H. C. Swart

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

In this paper, a series of trivalent Dy doped Li4CaB2O6nanocrystalline phosphors were synthesized by combustion method using urea as an organic fuel and their structural, optical and photoluminescence (PL) properties were investigated using X-Ray Diffraction, Transmission electron microscopy, diffuse reflectance spectroscopy and PL spectroscopy. The prepared nanophosphor crystallized in an orthorhombic phase with a space group of pnnm (113). The electronic band gap of the prepared nanophosphor was estimated as 5.2 eV. The PL study revealed that the Li4CaB2O6:Dy3+nanophosphor emitted yellowish white light arising from the two dominant emission bands one in the blue region corresponding to the4F9/2 → 6H15/2transition and the other in the yellow region corresponding to the4F9/2 → 6H13/2transition under near ultraviolet excitation. The study confirms the feasibility of the prepared nanophosphor to generate white light revealing its potential as a single dopant near white light emitting nanophosphor for white-light emitting diodes.

Original languageEnglish
Pages (from-to)939-945
Number of pages7
JournalJournal of Alloys and Compounds
Volume688
DOIs
Publication statusPublished - 2016
Externally publishedYes

Keywords

  • Borates
  • Combustion
  • LiCaBO:Dy
  • Nanophosphor
  • wLEDs

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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