Conducting Polymer-Based Flexible Transparent Electrode and New Emitting Materials for Organic Light-Emitting Diodes

목차 (Table of Contents)

• CHAPTER I Introduction 1
• 1.1. Key Technology for Flexible OLEDs 1
• 1.1.1. Flexible Substrates 1
• 1.1.2. Barrier Layers and Encapsulation 4
• 1.1.3. Flexible Transparent Electrodes 6
• 1.1.4. Challenges of OLEDs 7
• 1.2. Theoretical Background - Conducting Polymers 8
• 1.2.1. Poly(3,4-ethylenedioxythiophene) (PEDOT) 8
• 1.2.2. Synthetic Routes of PEDOT 10
• 1.2.3. Mechanism for Oxidative Polymerization of EDOT 12
• 1.2.4. Doping of PEDOT 12
• 1.3. Theoretical Background Efficiency Enhancement in OLEDs 16
• 1.3.2. Exciton Harvesting 16
• 1.3.2. Interface Engineering 16
• 1.3.3. Conductive Doping 17
• 1.3.4. Materials with High PL Quantum Yield 18
• 1.4. Objectives 19
• 1.5. References 20
• CHAPTER II Flexible Organic Light-Emitting Diode with a Conductive Polymer Electrode 24
• Abstract 24
• 2.1. Introduction 25
• 2.2. Experimental 26
• 2.2.1. In-situ Polymerization of PEDOT Thin Film 26
• 2.2.2. Characterization of PEDOT Thin Film 27
• 2.2.3. Preparation and Characterization of Flexible OLED Devices 27
• 2.3. Results and Discussion 29
• 2.3.1. Properties of the PEDOT Films 29
• 2.3.2. Effects of DMAc Incorporation in the Polymerization Process on the Properties of the PEDOT Films 32
• 2.3.3. Electroluminescence Characteristics of the FOLED Devices with PEDOT Anode 35
• 2.4. Conclusions 43
• 2.5. References 44
• CHAPTER III Single Wall Carbon Nanotube/Poly(3,4-ethylene-dioxythiophene) Nanocomposite Flexible Transparent Electrode 46
• Abstract 46
• 3.1. Introduction 47
• 3.2. Experimental 48
• 3.2.1. Preparation of SWNT Network 48
• 3.2.2. Preparetion of SWNT/PEDOT Nanocomposite Films 50
• 3.2.3. Characterization of SWNT/PEDOT Nanocomposite Film 50
• 3.2.4. Preparation and Characterization of ITO-free Flexible OLED Devices 51
• 3.3. Results and Discussion 51
• 3.3.1. Preparation of SWNT Network 51
• 3.3.2. Preparation of SWNT/PEDOT Nanocomposite Films 57
• 3.3.3. Electrical and Optical Properties of SWNT/PEDOT Nanocomposite Films 60
• 3.3.4. Topographical Properties and Current Mapping by Conductive-Atomic Force Microscopy 63
• 3.3.5. Electroluminescence Characteristics of Flexible Organic Light-Emitting Diodes 65
• 3.4. Conclusions 68
• 3.5. References 69
• CHAPTER IV High Work Function Conducting Polymer Anode for Highly Efficiency ITO-free Flexible Organic Light-Emitting Diodes 71
• Abstract 71
• 4.1. Introduction 72
• 4.2. Experimental 73
• 4.2.1. Preparation PEDOT:FTS Films with PFI 73
• 4.2.2. Characterization of PEDOT:FTS Films with PFI 73
• 4.2.3. Fabrication and Characterization of FOLEDs 74
• 4.3. Results and Discussion 75
• 4.3.1. Thickness and Transmittance of PEDOT:FTS Film with PFI 75
• 4.3.2. Electrical Properties of PEDOT:FTS Film with PFI 75
• 4.3.3. Surface Analysis of PEDOT:FTS Film with PFI 78
• 4.3.4. FOLEDs using PEDOT:FTS Anode 81
• 4.4. Conclusions 93
• 4.5. References 94
• CHAPTER V Effect of Intermolecular Interaction on the Characteristics of Organic Light Emitting Diodes with TPBB Derivatives 96
• Abstract 96
• 5.1. Introduction 97
• 5.2. Experimental 98
• 5.2.1.Synthesis of the TPBB Derivatives 98
• 5.2.2. Fabrication of OLEDs 98
• 5.2.3. Measurements 101
• 5.3. Results and Discussion 101
• 5.3.1. Electrochemical Properties of the TPBB Derivatives 101
• 5.3.2. Photophysical Properties of the TPBB Derivatives 101
• 5.3.3. Thermal Properties of the TPBB Derivatives 103
• 5.3.4. Electroluminescent Properties of the OLEDs with the TPBB Derivatives 103
• 5.4. Conclusions 109
• 5.5. References 110
• CHAPTER VI Donor-Acceptor Molecules Based on Phenothiazine and Benzimidazole for Organic Light-Emitting Diodes 111
• Abstract 111
• 6.1. Introduction 112
• 6.2. Experimental 113
• 6.2.1. Synthesis 113
• 6.2.2. Measurements 115
• 6.2.3. Fabrication of OLEDs 116
• 6.3. Results and Discussion 117
• 6.3.1. Synthesis 117
• 6.3.2. Thermal Properties 117
• 6.3.3. Photophysical Properties 120
• 6.3.4. Electrochemical Properties 122
• 6.3.5. Electroluminescence Properties of OLED Devices 124
• 6.4. Conclusions 131
• 6.5. References 132
• CHAPTER VII Organic Light-Emitting Diode with a New Green- Emitting Material: 2-(10-methyl-10H-phenothiazin-3-yl)-5-phenyl-1,3,4-oxadiazole 134
• Abstract 134
• 7.1. Introduction 135
• 7.2. Experimental 136
• 7.2.1. Synthesis 136
• 7.2.2. Measurements 136
• 7.2.3. Fabrication of OLEDs 138
• 7.3. Results and Discussion 138
• 7.3.1. Thermal Properties 138
• 7.3.2. Electrochemical Properties 139
• 7.3.3. Photophysical Properties 139
• 7.3.4. Electroluminescence Properties of OLED Devices 143
• 7.4. Conclusions 149
• 7.5. References 150
• CHAPTER VIII Summary 153