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Journal of Polymer & Composites Original Research Special issue Open Access

Synthesis and Photoluminescence Dynamics of Europium (III) and Terbium (III) Co-doped of GdSrAl3O7 Color-Tunable Nanophosphors

  1. Deepika Dhaterwal Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani
  2. Mahesh Matoria Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani
  3. Annu Dalal Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani
  4. Surender Kumar Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani
  5. Sonika Singh Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani

Abstract

A series of Europium (III) and Terbium (III) co-doped GdSrAl3O7 color-tunable nanophosphors were synthesized by a simplistic, streamlined and self-propagating, urea-assisted solution combustion synthesis process. The structural and luminescence characteristics of synthesized Eu3+/Tb3+ co-doped Gadolinium Strontium Aluminate nanocrystalline phosphors were validated using powder X- ray diffraction (PXRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X- ray analysis (EDAX), and photoluminescence spectra studies. The morphological studies revealed that the synthesized co-doped phosphor crystals seemed to be agglomerated spherical- shaped porous nanocrystalline particles with interconnected boundaries. Through diffuse reflectance (DR) spectroscopy, the optical band gap values for nanocrystalline phosphors were also studied. The simultaneous presence of these two rare earth ions may provide specific luminous assets, including efficient energy transfer along with controlled emissions. The detailed analysis of the photoluminescence excitation (PLE) and photoluminescence emission (PL) spectra of Europium (III) and Terbium (III) co-doped GdSrAl3O7 revealed that Tb3+ effectually sensitized Eu3+ ion and that the energy transfer could be precisely controlled to achieve color- tunable emission by varying the proportions of doped ions. The non- radiant energy loss i.e. concentration quenching phenomenon was also probed in detail. Additionally, by using their emission data, colorimetric traits including Commission International de I'Eclairage 1931 color coordinates, color purity (CP), and correlated color temperature (CCT) were also obtained. The photometric properties of developed nanocrystalline co-doped phosphor materials introduce new prospects and layout potentials for upgraded luminous materials that can be used in field emission displays, solid- state technologies, multicolor display applications and a variety of illumination strategies.

Keywords

References (50)

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