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Enhanced luminescence by tunable coupling of Eu3+ and Tb3+ in ZnAl2O4:Eu3+:Tb3+ phosphor synthesized by solution combustion method

  • Naveen Verma
  • Bernabe Marí
  • Krishan Chander Singh
  • Jitender Jindal
  • Suprabha Yadav
  • Anuj Mittal
Research
  • 79 Downloads

Abstract

ZnAl2O4:Eu3+ or Tb3+ (1 mol%) and ZnAl2O4:Eu3+/Tb3+ with varied concentrations of Eu3+ and Tb3+ were prepared by solution combustion method. The photoluminescence spectra of synthesized compounds shows that simultaneous doping of Tb3+ and Eu3+ causes enhancement in Eu3+ luminescence intensity. This indicates some energy transfer from Tb3+ to Eu3+. This phenomenon of Tb3+ → Eu3+ energy transfer, accomplishing enhanced intensity of Eu3+ ions, is attributed to the cross relaxation phenomenon, which is favored by overlap between the donor and acceptor transition. The energy is transferred to Eu3+ cascade rapidly via non-radiative transitions to 5D0 state. The synthesized compounds were characterized by XRD, SEM for their structural and morphological characteristics respectively.

Keywords

Aluminate Combustion method Cross relaxation Photoluminescence 

Notes

Acknowledgements

This work was supported by the European Commission through NanoCIS project (FP7-PEOPLE-2010-IRSES ref. 269279).

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Copyright information

© Australian Ceramic Society 2018

Authors and Affiliations

  • Naveen Verma
    • 1
  • Bernabe Marí
    • 2
  • Krishan Chander Singh
    • 1
  • Jitender Jindal
    • 1
  • Suprabha Yadav
    • 1
  • Anuj Mittal
    • 1
  1. 1.Department of ChemistryMaharshi Dayanand UniversityRohtakIndia
  2. 2.Institut de Disseny per la Fabricació Automatitzada - Departament de Física AplicadaUniversitat Politècnica de ValènciaValènciaSpain

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