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  • Title
  • DEDICATION
  • CERTIFICATE 1
  • CERTIFICATE-2
  • DECLARATION
  • ACKNOWLEDGEMENT
  • CONTENTS
  • Preface
  • 1. General Introduction
  • 1.1 Luminescence
  • 1.2 Photoluminescence
  • 1.2.1 Non-radiative relaxation processes
  • 1.2.2 Radiative processes -Fluorescence and Phosphorescence
  • 1.2.3 Configuration co-ordinate model of luminescence
  • 1.2.4 Kinetics of Luminescence
  • 1.2.5 Different decay mechanism
  • 1.2.6 Techniques to study optical properties of condensed matter
  • 1.3 Thermoluminescence
  • 1.3.1 Understanding of TL on the basis of energy band model
  • 1.3.2 Thermoluminescence - configuration coordinate diagram
  • 1.3.3 Mathematical Treatment
  • 1.3.4 Factors affecting TL
  • 1.3.5 TL Applications
  • 1.4 Luminescent Materials
  • 1.4.1 Phosphors
  • 1.4.2 Applications of Phosphors
  • 1.4.3 Melt Glasses
  • 1.4.4 Spectroscopy of Rare Earths in Glass
  • 1.4.5 Energy transfer in doped glasses
  • 1.4.6 Sot Gel glasses
  • 1.4.7 Sol-Gel Process
  • 1.4.8 Potential Advantages of the Sol-Gel Process References
  • References
  • 2. Photoluminescence studies of CaS: (Sm) and CaS: (Sm, Ce) phosphors
  • 2.1 Introduction
  • 2.2 Theoretical considerations
  • 2.3 Experimental procedure
  • 2.4 Results and Discussion
  • 2.4.1 Absorption spectra
  • 2.4.2 Excitation spectra
  • 2.4.3 Emission spectra
  • 2.4.4 Phosphorescence decay characteristics
  • 2.5 Conclusions
  • References
  • 3. Energy Transfer in Ce: Mn and Ce: Eu system in Phosphate Glasses
  • 3.1 Introduction
  • 3.2 Experimental procedure
  • 3.3 Theoretical considerations
  • 3.4 Results and Discussion
  • 3.4.1 Ce: Mn System.
  • 3.4.2 Ce: Eu System.
  • 3.5 Conclusions
  • References
  • 4. Structural and Spectroscopic Studies of Cu 2+ ions in Sol-Gel Derived Silica Matrix
  • 4.1 Introduction
  • 4.2 Experimental Procedure
  • 4.3 Results and Discussion
  • 4.3.1 Physical properties
  • 4.3.2 Structural Studies
  • 4.3.2.1 FTIR Spectral analysis
  • 4.3.2.2 Thermo gravimetric analysis
  • 4.3.2.3 Transmission electron microscopic analysis
  • 4 3.2 4 Scanning electron microscopic analysis
  • 4.3.3 Optical Studies
  • 4.4 Conclusions
  • References
  • 5. Thermoluminescence Studies of Doped Phosphors and Glasses
  • 5.1 Introduction
  • 5.2 Theoretical Methods of Analysis
  • 5.2.1 Heuristic methods
  • 5.2.2 Peakshape methods
  • 5.2.3 Symmetry factor and order of kinetics
  • 5.2.4 Various heating rate method
  • 5.2.5 Initial rise method
  • 5.3 Experimental Procedure
  • 5.4 Results and discussion
  • 5.4. (a) TL of Phosphors due to UV irradiation
  • 5.4. (b) TL of Phosphors due to gamma excitation
  • 5.4. (c) TL of Phosphate Glasses due to gamma excitation
  • 5.5 Conclusions
  • References