Contents

• 1. Introduction
  • 1.1 Organic Semiconductors: History and Applications
  • 1.2 Organic Semiconductor Physics
  • 1.3 Theoretical Concepts
    • 1.3.1 Gaussian Disorder Model (GDM)
    • 1.3.2 Percolation Theory
    • 1.3.3 Transport Energy
    • 1.3.4 Multiple Trapping Theory
  • 1.4 Organic Light-Emitting Diodes (OLED)
  • 1.5 Thin Film Organic Field-Effect Transistors (OTFT)
  • 1.6 Solar Cells
  • 1.7 Organic Lasers
  • 1.8 Organic Memory
  • 1.9 Scope and Outline of this Thesis
  
  
• 2. Mobility Models for Organic Semiconductors
  • 2.1 Introduction
  • 2.2 Carrier Concentration Dependence of Mobility
    • 2.2.1 Theory
    • 2.2.2 Results and Discussion
  • 2.3 Temperature and Electric Field Dependence of the Mobility
    • 2.3.1 Theory
    • 2.3.2 Low Electric Field Regime
    • 2.3.3 High Electric Field Regime
  • 2.4 Unified Mobility Model
    • 2.4.1 Theory
    • 2.4.2 Results and Discussion
  
  
• 3. The Effect of Fermi-Dirac Statistics on the Transport Energy
  • 3.1 Introduction
  • 3.2 Theory
  • 3.3 Results and Discussion
  
  
• 4. Doping and Trapping Model for Organic Semiconductors
  • 4.1 Introduction
  • 4.2 Theory
  • 4.3 Doping Characteristics
  • 4.4 Trapping Characteristics
  
  
• 5. Charge Injection Models for Organic Light-emitting Diodes
  • 5.1 Introduction
  • 5.2 Diffusion Controlled Injection Model for OLEDS
    • 5.2.1 Theory
    • 5.2.2 Results and Discussion
  • 5.3 Charge Injection Model for OLED Based on Master Equation
    • 5.3.1 Theory
    • 5.3.2 Results and Discussion
  
  
• 6. Space Charge Limited Current in Organic Light-emitting Diodes
  • 6.1 Introduction
  • 6.2 Theory
  • 6.3 Results and Discussion
  
  
• 7. Organic Semiconductor Device Models
  • 7.1 Introduction
  • 7.2 Analytical Model for Organic Thin Film Transistors
    • 7.2.1 Variable Range Hopping Transport in Organic Semiconductors
    • 7.2.2 Sheet Conductance of the OTFT
    • 7.2.3 Drain Current
    • 7.2.4 Results and Discussion
  • 7.3 Device Model for Unbipolar OLEDs
    • 7.3.1 Theory
    • 7.3.2 Results and Discussion
  
  
• 8. Conclusion
  • 8.1 Current Progress
  • 8.2 Future Work
  
  
• List of Figures