Synthesis and luminescence properties of Ca3Ga2Si3O12:RE3+ (RE = Eu/Tb) powder phosphors.
作者： K. Vemasevana Raju , C. Nageswara Raju , P. Giridhar , B. Vengala Rao , B. Sudhakar Reddy
DOI: 10.1002/BIO.1295
关键词: Rare earth ions 、 Analytical chemistry 、 Chemistry 、 Spectral line 、 Sol-gel 、 Phosphor 、 Pl spectra 、 Luminescence 、 Photoluminescence 、 Scanning electron microscope
摘要: Rare earth ions (Eu(3+) or Tb(3+) )-activated Ca(3) Ga(2) Si(3) O(12) (CaGaSi) phosphors were synthesized by using a sol-gel method. Photoluminescence spectra of Eu(3+):CaGaSi exhibited five emission bands at 578, 592, 612, 652 and 701 nm, which assigned to the transitions ((5)D(0) → (7)F(0), (7)F(1,)(7)F(2), (7)F(3) (7)F(4)), respectively, with an excitation wavelength λ(exci) = 392 nm. Among these, transition (5) D(0) (7) F(2) (612 nm) displayed bright red emission. In case Tb(3+):CaGaSi phosphors, four observed 488 ((5)D(4) (7)F(6)), 543 (7)F(5)), 584 (7)F(4)) 614 nm F(3) ) from measurement PL 376 (5)D(4) F(5) green The structure morphology studied measurements X-ray diffraction (XRD), scanning electron microscopy (SEM) energy-dispersive analysis (EDAX) results.
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