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Synthesis and detailed kinetic analysis using computerized glow‐curve deconvolution technique of nanocrystalline Sr 3 Al 2 O 6 :Pr 3+ – A new phosphor for UV applications
Author(s) -
Sharma Suchinder K.,
Pitale Shreyas S.,
Malik M. Manzar,
Dubey R. N.,
Qureshi M. S.
Publication year - 2008
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200824169
Subject(s) - thermoluminescence , phosphor , deconvolution , activation energy , analytical chemistry (journal) , nanocrystalline material , kinetic energy , crystallinity , energy (signal processing) , materials science , chemistry , luminescence , mineralogy , physics , optics , nanotechnology , optoelectronics , crystallography , chromatography , quantum mechanics
Pr 3+ ‐doped nanocrystalline Sr 3 Al 2 O 6 phosphor, synthesized through solution combustion route and calcined at 1100 °C is reported in this paper. The crystallinity checks followed by phosphorescence decay studies were performed to define the decaying rates of the present phosphor system. Thermoluminescence studies after UV‐irradiation were performed at room temperature and the glow peak obtained possesses three well‐defined temperature maxima at 383.75 K, 428 K and 509 K. T m – T stop and the repeated initial rise method (RIR) is applied to estimate approximate peak positions and the energy values for computerized glow‐curve deconvolution. The nonshifting T m property is applied to define the order of kinetics. The calculated activation energy after deconvolution lies between 0.72 eV and 1.28 eV distributed into eight different levels. The frequency factor is of the order of 10 9 s –1 to 10 11 s –1 . The figure of merit for deconvolution is 1.6%. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)