title: INVESTIGATION OF THERMOLUMINESCENCE CHARACTERISTICS OF Y2O3:Er3+ NANOPHOSPHORS.
abstract: Thermoluminescence (TL) characteristics of Y2O3:Er3+ nanophosphor exposed to UV radiations were investigated. Combustion synthesis method was employed to synthesise the nanophosphors. The confirmation for the pure cubic phase was done by powder X-ray diffraction. The particles formed were found to have 23.19 nm size and it was calculated by the Debye-Scherrer formula for [222] plane and is in close agreement with those obtained using transmission electron microscopy analysis. scanning electron microscopy micrograph reveals porous, irregular shaped particles with large agglomeration of particles whereas Fourier transform infrared spectroscopy studies confirm the presence of organic residua OH and CO in the samples. TL characteristics of UV irradiated Y2O3:Er3+ for (1-5) mol % were investigated. All the TL glow curves show almost similar glow curves having a single broad peak at 113.26, 113.82 113.72, 113.74 and 113.72°C for 1, 2, 3, 4 and 5 mol %, respectively, of Er3+ ions. The effects of heating rate were also studied and the trapping parameters, namely activation energy (E), order of kinetics (b) and frequency factor (s) were determined using Chen's peak shape method and computerised glow curve deconvolution technique suggested by Kitis for second-order kinetics. They were also discussed in detail for their possible usage in dosimetry.
authors.affiliation: Department of Applied Physics, Shri Shankaracharya Technical Campus, Bhilai, Chhattisgarh 490020, India.
authors.forename: Manmeet
authors.initials: M
authors.lastname: Kaur
authors.affiliation: S.O.S. in Physics and Astrophysics, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh 492010, India.
authors.forename: D P
authors.initials: DP
authors.lastname: Bisen
authors.affiliation: S.O.S. in Physics and Astrophysics, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh 492010, India.
authors.forename: N
authors.initials: N
authors.lastname: Brahme
authors.affiliation: Bharti College of Engineering & Technology, Durg, Chhattisgarh 491001, India.
authors.forename: Prabhjot
authors.initials: P
authors.lastname: Singh
mesh_terms: D007700:Kinetics; D046529:Microscopy, Electron, Transmission; D049329:Nanostructures / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014466:Ultraviolet Rays; D014961:X-Ray Diffraction