Sol–gel synthesis and luminescence properties of CaGd2(MoO4)4:Pr3+ phosphors for white LED applications

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Abstract

A series of novel red emitting CaGd2(MoO4)4:xPr3+ (x = 0.005–0.045) micro phosphors were successfully prepared via a simple citrate assisted sol–gel method-ray powder diffraction, scanning electron microscope, photoluminescence spectra and decay life time measurement were utilized to study the properties of CaGd2(MoO4)4:xPr3+ phosphors well crystallized, fine and homogenous micro particles appeared at the heat treatment at 900 °C for 6 h. The results confirms that CaGd2(MoO4)4 host has tetragonally distorted scheelite structure with space group I41/a. Under the excitation wavelength of 449 nm Pr3+ activated CaGd2(MoO4)4 phosphor shows the red emission peaked at about 649 nm, which is attributed to 3P03F2 transition of Pr3+ ions. The CIE co-ordinates of CaGd2(MoO4)4:0.035Pr3+ phosphor are x = 0.702 and y = 0.289, which are evidently close to the standard NSTC value. The luminescence properties of as prepared phosphors indicates that CaGd2(MoO4)4:xPr3+ phosphor may be a potential red emitting material for W-LED applications.

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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Saravana Kumar Jaganathan
    • 1
    • 2
    • 3
  • Anthuvan John Peter
    • 4
  1. 1.Department for Management of Science and Technology DevelopmentTon Duc Thang UniversityHo Chi Minh CityVietnam
  2. 2.Faculty of Applied SciencesTon Duc Thang UniversityHo Chi Minh CityVietnam
  3. 3.IJN-UTM Cardiovascular Engineering Center, Department of Clinical Sciences, Faculty of Biosciences and Medical EngineeringUniversiti Teknologi MalaysiaSkudaiMalaysia
  4. 4.Department of PhysicsSt. Anne’s College of Engineering and TechnologyPanrutiIndia

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