International Journal of Science and Technology

International Journal of Science and Technology>> Volume 7, Number 9, September 2017

International Journal of Science and Technology

Influence of Thallium Co-Doped Luminescence characteristics of KBr0.95 I0.05:Eu2+ Mixed Crystals

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Author P. Eswaran
On Pages 121-123
Volume No. 1
Issue No. 3
Issue Date September 01, 2011
Publishing Date September 01, 2011
Keywords Mixed crystals, Tl+ ion; Eu2+ ion, co-doped Mixed crystals, PL, PSL, Co-doped KBr-KI:Eu2+


The photoluminescence (PL) spectrum of KBr0.95 I0.05:Eu2+ (0.05mol %) mixed crystal gives emission of europium at 420nm. This 420nm emission is due to the transition from T2g component of 4f6 5d configuration to the ground state 8s of europium. When adding Tl+ ion as co-activator in KBr0.95 I0.05:Eu2+ (0.05mol %) mixed crystal the same PL emission observed and enhanced their PL intensity. This enhancement is attributed to the energy transfer from Tl+ Eu2+ions. Photo stimulated luminescence (PSL) studies on ?-irradiated KBr0.95 I0.05:Eu2+, Tl+ mixed crystal is discussed and tentative mechanism in the present study is reported. 

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