title: Synthesis, characterization and thermoluminescence studies of (ZnS)1-x(MnTe)xnanophosphors.
abstract: The present paper reports the thermoluminescence (TL) of (ZnS)1-x(MnTe)xnanophosphors 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¯3m. 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)xnanophosphor 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.
authors.affiliation: School of Studies in Physics and Astrophysics, Pt. RaviShankar Shukla University, Raipur, (C.G.), India.
authors.forename: Deepti
authors.initials: D
authors.lastname: Pateria
authors.affiliation: School of Studies in Physics and Astrophysics, Pt. RaviShankar Shukla University, Raipur, (C.G.), India.
authors.forename: R N
authors.initials: RN
authors.lastname: Baghel
authors.affiliation: School of Studies in Physics and Astrophysics, Pt. RaviShankar Shukla University, Raipur, (C.G.), India.
authors.forename: D P
authors.initials: DP
authors.lastname: Bisen
authors.affiliation: Department of Applied Physics, Raipur Institute of Technology, Chhatauna, Mandir Hasuad, Raipur, 492101, (C.G.), India.
authors.forename: Piyush
authors.initials: P
authors.lastname: Jha
authors.affiliation: Department of Electrical and Electronics Engineering, Chhatrapati Shivaji Institute of Technology, Shivaji Nagar, (C.G.), India.
authors.forename: V K
authors.initials: VK
authors.lastname: Chandra
authors.affiliation: School of Studies in Physics and Astrophysics, Pt. RaviShankar Shukla University, Raipur, (C.G.), India.
authors.forename: B P
authors.initials: BP
authors.lastname: Chandra
mesh_terms: D049449:Luminescence; D008163:Luminescent Measurements; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D013440:Sulfides / Q000737:chemistry*; D013499:Surface Properties; D013691:Tellurium / Q000737:chemistry*; D013696:Temperature; D017967:Zinc Compounds / Q000737:chemistry*
chemical_list: D013440:Sulfides; D017967:Zinc Compounds; C031238:zinc sulfide; D013691:Tellurium
keywords: (ZnS)1-x(MnTe)x; Thermoluminescence; nanophosphors; wet chemical method