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Synthesis, characterization and thermoluminescence studies of (ZnS) 1‐x (MnTe) x nanophosphors
Author(s) -
Pateria Deepti,
Baghel R. N.,
Bisen D. P.,
Jha Piyush,
Chandra V. K.,
Chandra B. P.
Publication year - 2017
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3189
Subject(s) - thermoluminescence , mechanoluminescence , photoluminescence , materials science , analytical chemistry (journal) , luminescence , phosphor , quenching (fluorescence) , mineralogy , chemistry , optics , optoelectronics , fluorescence , physics , chromatography
Abstract The present paper reports the thermoluminescence (TL) of (ZnS) 1‐x (MnTe) x nanophosphors that were prepared by a wet chemical synthesis method. The structure investigated by X‐ray diffraction patterns confirms the formation of a sphalerite phase whose space group was found to be F 4 ¯ 3 m . From XRD, TEM and SEM analyses the average sizes of the particles were found to be 12 nm, 11 nm and 15 nm, respectively. Initially the TL intensity increased with increasing values of x because the number of luminescence centres increased; however, for higher values of x the TL intensity decreased because of the concentration quenching. Thus the TL, mechanoluminescence and photoluminescence intensities are optimum for a particular value of x, that is for x = 0.05. Thermoluminescence of the (ZnS) 1‐x (MnTe) x nanophosphor has not been reported previously. There were two peaks seen in the thermoluminescence glow curves in which the first peak lay at 105–100 °C and the second peak lay at 183.5–178.5 °C. The activation energies for the first and second peaks were found to be 0.45 eV and 0.75 eV, respectively.