Enhanced red emission from CaZrO3:Eu3+ nano-phosphors prepared by Sol-gel technique
Author Affiliations
- 1M.D.U., Rohatk-124001, Haryana, India
- 2M.D.U., Rohatk-124001, Haryana, India
- 3M.D.U., Rohatk-124001, Haryana, India
Res. J. Material Sci., Volume 11, Issue (1), Pages 1-5, February,16 (2023)
Abstract
Alkali metal ions codoped CaZrO3:Eu3+ nanophosphors series prepared by sol gel technique were further reheated to 750 oC to improve crystallinity of the product. The crystal structure and surface morphology of materials were determined by X-ray diffraction (XRD) and scanning electron microscopy (SEM) technique. XRD results confirmed orthorhombic perovskites structures of CaZrO3:Eu3+. The surface morphologies of materials were consisting of small, coagulated, cubical particles with smooth and regular surfaces. The characteristic strong red emissions of Eu3+ ions in CaZrO3:Eu3+, M (M=Li+, Na+, K+) mainly at 613nm is due to 5D0→7F2 transitions and other weaker emissions were also observed at 575, 592, 654, and 698-705 nm corresponding to 5D0→7FJ (where J = 0, 1, 3, 4) transitions respectively. The remarkable increase of photoluminescence intensity corresponding to 5D0→7F2 transitions was observed in CaZrO3:Eu3+ if co-doped with Li+ ions.
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