The Influence Of Different Synthesis Routes On Thermoluminescence Of CaSO4: Dy, P, Ce Phosphors

¹Department of Physics, RTM Nagpur University, Nagpur 440033, India

²Department of Physics, M.M.Science College, Sakkardara, Nagpur 440009, India

Adv. Mater. Lett., 2013, Current Issue, 4 (5), pp 363-367

DOI: 10.5185/amlett.2012.10433

Publication Date (Web): Feb 23, 2013

Copyright © IAAM-VBRI Press

E-mail: sjdhoble@rediffmail.com

Abstract

Anchor Ca_SO₄: Dy, P is known for its dosimetric characteristics for a very long time now. In this work we have carried out a comparative study on TL intensity of CaSO₄: Dy, P, Ce phosphors using two different wet chemical synthesis routes. Nobody seems to have reported this kind of study on CaSO₄: Dy, P, Ce³⁺ phosphors and as a result it may be regarded as something new. Phosphors were characterized by scanning electron microscopy, photoluminescence and thermoluminescence techniques. The two methods were found to drastically affect the TL intensity of CaSO₄: Dy, P, Ce phosphors. The TL intensity of CaSO₄: Dy, P, Ce prepared by co-precipitation method is less by a factor of 204 than the CaSO₄: Dy, P, Ce phosphor prepared via acid evaporation method. Moreover, co-doping of P and Ce ions into CaSO₄:Dy was observed to enhance the thermoluminescence intensity by a factor of 1.11 than the standard phosphor in case of phosphor prepared via acid evaporation method. Surface morphology resulted through two different synthesis routes was also studied. Structures like broad metal slabs were observed for CaSO₄: Dy, P, Ce phosphors using acid evaporation method. We hope that this study may prove very helpful in selecting a preparation method for CaSO₄: Dy, RE phosphors especially when better TL properties and good crystal grain size are desired. We also think that acid evaporation method is always a better choice to prepare CaSO₄: Dy, RE phosphors than co-precipitation method.

Keywords

Synthesis routes, thermoluminescence intensity, phosphor, dosimetry.