International Journal of Luminescence and Applications (ISSN: 2277-6362) Vol. 5, No. 2, June 2015. Article ID: 098. pp.239-241. 239 Photoluminescence and Thermoluminescence Study of Europium Doped YAM Phosphor Priyanshu Upadhyay 1 , Diksha Verma 1 , Abhinav Bourase 2 , D. Suman Prasad 2 , Vikas Dubey 1* , Ratnesh Tiwari 1 , Raunak Kumar Tamrakar 1 , Yogita Parganiha and Jagjeet Kaur 1 Department of Physics Bhilai Institute of Technology, Raipur C.G., India 2 Department of Mechanical Engineering, ITM University, Raipur 3 Govt. Vishwanath Yadav Tamaskar Post Graduate Autonomous College, Durg, C.G., India Abstract— Paper reports the photoluminescence and thermoluminescence analysis of europium doped Y 4 Al 2 O 9 phosphor for variable concentration of Eu 3+ . The sample was prepared by the conventional solid state reaction method, which is the most suitable for large-scale production. The prepared phosphor sample was characterized using X-Ray Diffraction (XRD), Photoluminescence (PL), Thermoluminescence (TL) and CIE techniques. The PL emission was observed in 613nm which is dominant peak gives the intense red emission for the Y 4 Al 2 O 9 phosphor doped with Eu 3+ (0.2 mol% to 2 mol%). Excitation spectrum found at 254nm. The emission spectrum of Eu 3+ ions consists mainly due to the transitions from the 5 D 0 level to the levels 7 F J (J=0, 1, 2, 3, 4) of Eu ions. The dependence of luminescence intensity on Eu concentration shows concentration quenching after 2mol% of europium. Thermoluminescence study was carried out for the phosphor with UV irradiation. Kinetic parameter was calculated by CGCD technique. Keywords— Thermoluminescence; Photoluinescence; CGCD 1. INTRODUCTION 1 During the past decades, nanostructured materials have attracted considerable attention for their novel and enhanced properties, e.g., the Mn doped ZnS phosphor can yield both high luminescent efficiencies and short lifetime [1, 2]. Nanostructured materials may be developed to form a novel type of luminescent materials for display applications. The Y 2 O 3 –Al 2 O 3 system is a promising material for refractory coatings and for ceramic and semiconductor processing technology [3, 4]. Doped yttrium aluminium garnet (YAG) is widely used as a laser host material [5, 6], and yttrium aluminum perovskite (YAP) used as scintillation host material [7]. In addition, rare earth doped YAG is also employed as a phosphor [8, 9]. However, there are few reports on rare earth doped Y 4 Al 2 O 9 (YAM) [10-18]. 1.1 Experimental Phosphor Y 4 Al 2 O 9 with different concentrations of europium (0.2 mol % to 2.5 mol %), was synthesized by solid state reaction method with calcination temperature at 1000 o C for 1 hour in a muffle furnace. Every heating is followed by intermediate grinding using agate mortar and pestle. The starting materials used for sample preparation are Y 2 O 3 , Al 2 O 3 Eu 2 O 3 and were used to prepare the phosphor. After being ground thoroughly in stoichiometric ratios by using an agate mortar by dry grinding for nearly 45 minutes, to ensure the best * Corresponding Authror Email: jsvikasdubey@gmail.com homogeneity and reactivity, powder was transferred to alumina crucible, and then heated in a muffle furnace at 1300 °C for 4 hour [19-27]. The phosphor materials were cooled to room temperature naturally. The sample was characterized using XRD, photoluminescence (PL) emission and excitation spectra, and thermally stimulated luminescence glow curves were recorded at room temperature by using TLD reader I1009 supplied by Nucleonix Sys. Pvt. Ltd. Hyderabad [17-19]. The obtained phosphor under the TL examination is given UV radiation using 254nm UV source. Heating rate used for TL measurement is 5 0 Cs -1 . 1.2 Results and Discussion The XRD pattern of the sample is shown in figure 1. Structural parameters are described in table 1 which gives Fig. 1: XRD pattern of YAM:Eu 3+ phosphor (1.5mol% Eu 3+ ) Position [°2Theta] 20 30 40 50 60 70 Counts/s 0 100 200 300 400 15%EU~1.XRD