TL Glow Curve Study, Kinetics, PL and XRD Analysis of Mn2+ Doped CaAl2O4 Phosphors
Author(s)
Jagjeet Kaur,
Nemana Subramanyam Suryanarayana,
Beena Jaykumar*,
Vikas Dubey,
Ravi Shrivastava,
Huma Nazli Baig
Affiliation(s)
Department of Physics, Vishwanath Yadav Tamaskar Post Graduate Autonomous College, Durg, India.
Department of Physics, Vishwanath Yadav Tamaskar Post Graduate Autonomous College, Durg, India.
ABSTRACT
The present paper reports Thermoluminescence (TL) Glow curve of Mn2+ doped CaAl2O4 phosphor with different UV exposure time. The Glow peak shows general order kinetics and evaluation of kinetic parameters was done by peak shape method. Calculations of Trap Depth were done with Chen’s different methods and order of kinetics, activation energy and frequency factor are calculated. The recorded glow curve shifts towards higher temperature with increasing intensity as a function of UV exposure time until 30 minutes where it is seen that the peak shifts towards low temperature side and intensity also decreases. The peaks were found at 345?C, 356.83?C, 358?C and 356.73?C respectively using the heating rate 6.7?C/s. The PL (photoluminescence) excitation spectra show peaks at 248 nm and 362 nm whereas emission spectra shows peaks between 364 nm and 551 nm. Sample was characterized by XRD technique.
The present paper reports Thermoluminescence (TL) Glow curve of Mn2+ doped CaAl2O4 phosphor with different UV exposure time. The Glow peak shows general order kinetics and evaluation of kinetic parameters was done by peak shape method. Calculations of Trap Depth were done with Chen’s different methods and order of kinetics, activation energy and frequency factor are calculated. The recorded glow curve shifts towards higher temperature with increasing intensity as a function of UV exposure time until 30 minutes where it is seen that the peak shifts towards low temperature side and intensity also decreases. The peaks were found at 345?C, 356.83?C, 358?C and 356.73?C respectively using the heating rate 6.7?C/s. The PL (photoluminescence) excitation spectra show peaks at 248 nm and 362 nm whereas emission spectra shows peaks between 364 nm and 551 nm. Sample was characterized by XRD technique.
Cite this paper
J. Kaur, N. Suryanarayana, B. Jaykumar, V. Dubey, R. Shrivastava and H. Baig, "TL Glow Curve Study, Kinetics, PL and XRD Analysis of Mn2+ Doped CaAl2O4 Phosphors," Journal of Minerals and Materials Characterization and Engineering, Vol. 11 No. 11, 2012, pp. 1081-1084. doi: 10.4236/jmmce.2012.1111114.
J. Kaur, N. Suryanarayana, B. Jaykumar, V. Dubey, R. Shrivastava and H. Baig, "TL Glow Curve Study, Kinetics, PL and XRD Analysis of Mn2+ Doped CaAl2O4 Phosphors," Journal of Minerals and Materials Characterization and Engineering, Vol. 11 No. 11, 2012, pp. 1081-1084. doi: 10.4236/jmmce.2012.1111114.
References
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[1] T. Justel, H. Nikol and C. Ronda, “New Developments in the Field of Luminescent Materials for Lighting and Displays,” Angewandte Chemie, International Edition, Vol. 37, No. 22, 1998, pp. 3084-3103. doi:10.1002/(SICI)1521-3773(19981204)37:22<3084::AID-ANIE3084>3.0.CO;2-W [2] B. M. J. Smets, “Phosphors Based on Rare-Earths, a New Era in Fluorescent Lighting,” Materials Chemistry and Physics, Vol. 16, No. 3-4, 1987, pp. 283-299. doi:10.1016/0254-0584(87)90103-9 [3] C. R. Ronda, “Recent Achievements in Research on Pho- sphors for Lamps and Displays,” Journal of Luminescence, Vol. 72-74, 1997, pp. 49-54. doi:10.1016/S0022-2313(96)00374-2 [4] T. Matsuzawa, Y. Aoki, N. Takeuchi and Y. Murayama, “A New Long Phosphorescent Phosphor with High Brightness, SrAl2O4:?Eu2+,?Dy3+,” Journal of the Electrochemical Society, Vol. 143, No. 8, 1996, pp. 2670-2673. doi:10.1149/1.1837067 [5] M. Ashida, K. Okamoto, I. Ozaki, H. Fukuda, K. Ohmi, S. Tanaka, H. Kobayashi, M. Hayashi and M. Minamoto, “Applicability of Green-Emitting SrAl2O4: Eu2+ Phosphors for PDP Applications,” Proceedings of the International Display Work-Shop’ 98, Kobe, 1998, p. 597. [6] K. Jagjeet, N. S. Suryanarayana, D. Vikas, N. Rajput and T. L. Glow, “Curve and Kinetic study of Eu3+ Doped SrY2O4 Phosphors,” Research Journal of Chemical Sciences, Vol. 1, No. 6, 2011, pp. 83-87. [7] V. Dubey, N. S. Suryanarayana and J. Kaur, “Kinetics of TL Glow Peak of Limestone from Patharia of CG Basin (India),” Journal of Minerals & Materials Characterization & Engineering, Vol. 9, No. 12, 2010, pp.1101-1111.