Influence of Thallium Co-Doped Luminescence characteristics of KBr0.95 I0.05:Eu
نویسنده
چکیده
The photoluminescence (PL) spectrum of KBr0.95 I0.05:Eu 2+ (0.05mol %) mixed crystal gives emission of europium at 420nm. This 420nm emission is due to the transition from T 2g component of 4f 6 5d configuration to the ground state 8s of europium. When adding Tl + ion as co-activator in KBr0.95 I0.05:Eu 2+ (0.05mol %) mixed crystal the same PL emission observed and enhanced their PL intensity. This enhancement is attributed to the energy transfer from Tl + Eu 2+ ions. Photo stimulated luminescence (PSL) studies on γ-irradiated KBr0.95 I0.05:Eu 2+ , Tl + mixed crystal is discussed and tentative mechanism in the present study is reported.
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