Mon, November 18, 2019   Advanced Search

Thermoluminiscence of UV irradiated CaAl2O4 Phosphors

Shushil Kumar Sharma and M. Z. Khan

Department of Physics,
Dr. C. V. Raman University, Kota Bilaspur (C.G.) INDIA.

ABSTRACT

CaAl2O4 sample was prepared by a high-temperature solid-state reaction route. Structural and Microstructural studies confirm that the material is stabilized in monoclinic phase with space group P21/c with cell dimensions: a = 8.71312, b = 8.07945, c = 15.21562 and  = 900, β = 90.090, Υ = 90.110 which gives close agreement with (JCPDF No- 23-1036). Dy3+ emits mainly at two peaks in the visible spectrum, may be originating from 4F9/2 → 6H15/2 (430-500nm) and 4F9/2 → 6H13/2 (550 -600nm) transition. From the PL and TL studies it is confirmed that Dy3+ doped CaAl2O4 is a good material for dosimetry applications. The emission centres are Dy3+ ions.

Keywords : Luminescence, Phosphors, XRD, Transition.