Luminescence and structural properties of Gd2SiO5:Eu3+ phosphors synthesized from the modified solid state method |
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| Affiliation: | 1. Department of Physics, Govt. VishwanathYadav Tamaskar Post Graduate Autonomous College, Durg, CG 491001, India;2. Department of Physics, Bhilai Institute of Technology, Raipur 493661, India;3. ICFAI University, Kumhari, Raipur, CG, India;4. Department of Physics, Rashatrasant Tukadoji Maharaj Nagpur University, Nagpur 440033, India;5. Department of Physics, University of the Free State, Bloemfontein ZA9300, South Africa;1. Federal University of São Carlos, Materials Engineering Department, Rod. Washington Luiz, km 235, São Carlos, SP 13565-905, Brazil;2. Petrobras, Research and Development Center, Rio de Janeiro, RJ 21941-915, Brazil;1. Pukyong National University, LED Convergence Engineering, 365 Sinseon-ro, Busan, 48547, Republic of Korea;2. Dongeui Institute of Technology, Radiological Technology, 54 Yangji-ro, Busan, 47230, Republic of Korea;1. School of Physics, Shri Mata Vaishno Devi University, Katra 182320, J&K, India;2. Department of Physics, MK Bhavnagar University, Bhavnagar 364001, Gujarat, India;3. Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein ZA9300, South Africa;1. Department of Physics, University of the Free State, Bloemfontein, ZA-9300, South Africa;2. School of Physics, University of the Witwatersrand, Private Bag 3, Wits, 2050, South Africa;3. Department of Materials Science and Engineering, Korea University, Anam-ro, Seoul, 02841, South Korea;1. Department of Physics, University of the Free State (Qwaqwa), Private Bag ×13, Phuthaditjhaba 9866, South Africa;2. Department of Physics, University of the Free State, P. O. Box 339, Bloemfontein 9300, South Africa |
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| Abstract: | This paper reports the preparation of Eu3+ doped Gadolinium oxyorthosilicate (Gd2SiO5:Eu3+) phosphor with different concentration of Eu3+(0.1–2.5 mol%) using the modified solid state reaction method. The synthesis procedure of the Gd2SiO5:Eu3+phosphor using inorganic materials such as Gd2O3, silicon dioxide (SiO2), europium oxide (Eu2O3) and boric acid (H3BO3) as flux is discussed in detail. The prepared phosphor samples were characterized by using X-Ray Diffraction (XRD), Field Emission Gun Scanning Electron Microscopy (FEGSEM), Transmission Electron Microscopy (TEM), Fourier Transform Infrared Spectroscopy (FTIR), Photoluminescence (PL) and Thermoluminescence (TL). The Commission Internationale de l′Eclairage(CIE) coordinates were also calculated. The PL emission was observed in the 350–630 nm range for the Gd2SiO5:Eu3+ phosphor. PL excitation peaks were observed at 266, 275, 312 and 395 nm while the emission peaks were observed at 380, 416, 437, 545, 579, 589, 607, 615 and 628 nm. The emission peak at 615 nm was the most intense peak for all the different Eu3+ concentration samples. From the XRD data, using the Scherrer's formula, the average crystallite size of the Gd2SiO5:Eu3+ phosphor was calculated to be 33 nm. TL was carried out for the phosphor after both UV and gamma irradiation. The TL response of the Gd2SiO5:Eu3+ phosphor for the two different radiations was compared and studied in detail. It was found that the present phosphor can acts as a single host for red emission (1.5 mol%) for display devices and light emitting diode (LED) and white light emission for Eu3+(0.1 mol%) and it might be used as a TL dosimetric material for gamma dose detection. |
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| Keywords: | Modified solid state method Thermoluminescence Photoluminescence TL glow curve CIE |
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