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PL & TL study of synthesized LaYPO4: Gd, Eu Phosphor

K.G.Chaudhari1, B.Subba Rao2 and  K.V.R.Murthy3
1Applied Physics Department, MCT’S Rajiv Gandhi Institute of technology, Versova, Andheri (w), Mumbai-400053
2Department of Physics, VSR & NVR College, Tenali – 522 201, Guntur District, A.P
3Display Materials Laboratory, Applied Physics Department, Faculty of Technology and Engineering, The M. S. University of Baroda, Vadodara-390001, India

 

ABSTRACT

        The present paper reports the synthesis and PL, Tl study of the LaYPO4 phosphor doped with Gd & Eu rare earth ions keeping Gd concentration constant (0.5%) and varying Eu concentration as 0.1, 0.5, 1.5,and 2% is described.  The phosphors were synthesized using the standard solid state reaction technique and ground using mortar and pestle, fired at 1200oC for 3 hour in a muffle furnace. The produced materials were analyzed by XRD, PL and TL. We have studied the effect of dopants on the Photoluminescence and thermoluminescence properties of LaYPO4 phosphor. Under the excitation of 254 nm wavelength, PL properties of the samples were studied using Spectrofluorophotometer at room temperature. PL emission of doped LaYPO4 phosphor shows peaks at 365,397,469,475,589, 596, 614 and 622nm with good intensity. As the Eu concentration increases the PL intensity also increases.

Keywords: Photoluminescence; XRD; phosphor rare-earth ions; solid state reaction technique; thermoluminscence.

 

 


International eJournal of Mathematics and Engineering

Volume 3, Issue 4, Pages:  1770 - 1774