Dysprosium doped di-calcium magnesium di-silicate white light emitting phosphor by solid state reaction method

  • Ishwar Prasad SahuEmail author
  • D. P. Bisen
  • Nameeta Brahme
  • Raunak Kumar Tamrakar
  • Ravi Shrivastava


In this paper, we report the dysprosium doped di-calcium magnesium di-silicate namely Ca2MgSi2O7:xDy3+ (x = 1.0, 1.5, 2.0, 2.5 and 3.0 mol%) phosphors were prepared by traditional high temperature solid state reaction method. Phosphors with optimum photo-luminescence intensity [Ca2MgSi2O7:Dy3+ (2 %)] were characterized by X-ray diffraction (XRD) technique. The crystal structure of sintered phosphors were an akermanite type which belongs to the tetragonal crystallography with space group \( {\text{P}}\overline{ 4 2}_{1} {\text{m}} \). The chemical composition of the sintered phosphor Ca2MgSi2O7:Dy3+ (2 %) was confirmed by the energy dispersive X-ray spectroscopy (EDS). Under the ultraviolet excitation, the emission spectra of Ca2MgSi2O7:xDy3+ (x = 1.0, 1.5, 2.0, 2.5 and 3.0 mol%) phosphors were composed of broad band with the characteristic emission of Dy3+ ions are peaking at 475 nm (blue), 577 nm (yellow) and 678 nm (red), originating from the transitions of 4F9/2 → 6Hj state (where j = 15/2, 13/2, 11/2). The combination of these three emissions constituted white light as indicated on the Commission Internationale de l’Eclairage chromaticity diagram. The possible mechanism of the prepared white light emitting Ca2MgSi2O7:xDy3+ (x = 1.0, 1.5, 2.0, 2.5 and 3.0 mol%) phosphors were also investigated. Investigation on decay property show that phosphor held fast and slow decay process. The peak of mechanoluminescence (ML) intensity increases linearly with increasing impact velocity of the moving piston, which suggests that this phosphor can be used as sensors to detect the stress of an object. Thus the present investigation indicates that piezo-electricity is responsible to produce ML in prepared phosphors.


Impact Velocity Dysprosium Trap Depth Glow Peak Correlate Color Temperature 
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“We are very grateful to UGC-DAE Consortium for Scientific Research, Indore (M.P.) for the XRD Characterization and we are very thankful Dr. Mukul Gupta for his co-operation”. We are very thankful to Dr. K.V.R. Murthy, Department of Applied physics, M.S. University Baroda, Vadodara (Gujarat) India for the photoluminescence study.


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Ishwar Prasad Sahu
    • 1
    Email author
  • D. P. Bisen
    • 1
  • Nameeta Brahme
    • 1
  • Raunak Kumar Tamrakar
    • 2
  • Ravi Shrivastava
    • 3
  1. 1.School of Studies in Physics and AstrophysicsPt. Ravishankar Shukla UniversityRaipurIndia
  2. 2.Department of Applied PhysicsBhilai Institute of TechnologyDurgIndia
  3. 3.Department of PhysicsICFAI UniversityRaipurIndia

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