Synthesis, Characterization and Thermoluminescence Studies of (ZnS)_1-x(MnTe)_x Nanophosphors

Deepti Pateria¹ and Jyostna Chauhan^2,

¹School of Studies in Physics and Astrophysics, Pt. RaviShankar Shukla University, Raipur-492010 (C.G.), India

²HOD Nanotechnology Rajiv Ganhi Techanical University, Bhopal (M.P.)

Cite this paper:
Deepti Pateria and Jyostna Chauhan. Synthesis, Characterization and Thermoluminescence Studies of (ZnS)_1-x(MnTe)_x Nanophosphors. American Journal of Nanomaterials. 2016; 4(3):52-57. doi: 10.12691/ajn-4-3-1

Abstract

The present paper reports the thermoluminescence (TL) of (ZnS) _1-x (MnTe) _x nanophosphors which was prepared by wet chemical synthesis. (ZnS)_1-x(MnTe)_x nanophosphors give intense thermoluminescence. The structure investigated by X-ray diffraction patterns confirms the formation of sphalerite phase whose space group is found to be F3 m. From XRD mesurement average size of particles was found of 11 nm. The TEM measurement indicates that the particle size is in the 9-13 nm. Nanometre size phosphors are preferred in a number of applications not only due to their particle size but also due to smooth imaging of the stress. (ZnS) _1-x (MnTe) _x is very use full material and can be used in various luminescence applications such as making of various sensors and thermoluminescence application like dosimetry, ete. Initially the TL intensity increases with increasing value of x because the number of luminescence centres increases. However, for higher values of x the TL intensity decreases because of the concentration quenching. Thus the TL, Mechanoluminescence (ML) and Photoluminescence (PL) intensities are optimum for a particular value of x, that is, for x=0.05. Thermoluminescence of (ZnS) _1-x (MnTe) _x nanophosphor has not reported, till now. There are two peaks in thermoluminescence glow curves of in which the first peak lies at 105°C-100°C and the second peak lies at 183.5°C -178.5°C. The activation energies for frist and second peaks are found to be 0.45 eV and 0.75 eV, respectively.

Keywords:
Thermoluminescence (ZnS) _1-x(MnTe)_x Nanophosphors Wet chemical method II-IV semiconductors

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