Fabrication and Characterization of Transparent and Conductive hybrid Electrodes for Flexible Organic Light-Emitting Diodes
- 주제(키워드) OLED , Electrode , AgNW , Silver Nanowire
- 발행기관 고려대학교 대학원
- 지도교수 주병권
- 발행년도 2017
- 학위수여년월 2017. 2
- 학위구분 석사
- 학과 대학원 전기전자공학과
- 세부전공 반도체 및 나노전공
- 원문페이지 73 p
- 실제URI http://www.dcollection.net/handler/korea/000000071851
- 본문언어 영어
- 제출원본 000045897529
초록/요약
Solution-processed silver nanowire (AgNW) has been considered as a promising material for next generation flexible transparent conductive electrodes. However, despite the advantages of AgNWs, some of their intrinsic drawbacks, such as large surface roughness and poor interconnection between wires, limit their practical application in organic light-emitting diodes (OLEDs). Herein, we report a high-performance AgNW-based hybrid electrode composed of indium-doped zinc oxide (IZO) and poly (3,4-ethylenediowythiophene):poly(styrenesulfonate) [PEDOT:PSS]. The IZO layer protects the underlying AgNWs from oxidation and corrosion and tightly fuses the wires together and to the substrate. The PEDOT:PSS effectively reduces surface roughness and increases the hybrid films’transmittance. The fabricated electrodes exhibited a low sheet resistance of 5.9 Ωsq−1 with high transmittance of 86% at 550 nm. The optical, electrical, and mechanical properties of the AgNW-based hybrid films were investigated in detail to determine the structure-property relations, and whether optical or electrical properties could be controlled with variation in each layer’s thickness to satisfy different requirements for different applications. Flexible OLEDs (f-OLEDs) were successfully fabricated on the hybrid electrodes to prove their applicability; their performance was even better than those on commercial indium doped tin oxide (ITO) electrodes.
more목차
TABLE OF CONTENTS
ABSTRACT i
TABLE OF CONTENTS iii
LIST OF FIGURES vi
LIST OF IMPORTANT ABBREVIATIONS x
CHAPTER 1. INTRODUCTION 1
CHAPTER 2. THEORETICAL BACKGROUND 5
2. 1. Organic Light Emitting Diodes 5
2. 2. Transparent Conductive Electrodes for Flexible Electronics 8
2. 2. 1. Conducting Polymer 10
2. 2. 2. Metal Mesh 12
2. 2. 3. Silver Nanowire 13
2. 2. 4. Hybrid Composites 15
CHAPTER 3. EXPERIMENTAL DETAILS 16
3. 1. Fabrication of Hybrid Electrodes 16
3. 2. Fabrication of Organic Light-Emitting Diodes 19
CHAPTER 4. RESULTS AND DISCUSSION 21
4. 1. Electrical and Optical Properties of Hybrid Electrodes 21
4. 2. Mechanical Properties of Hybrid Electrodes 30
4. 3. Stability of Hybrid Electrodes 38
4. 3. 1. Stability to Oxidation 38
4. 3. 2. Adhesion and Chemical Stability 40
4. 3. 3. Stability under Electrical Stress 43
4. 4. Performance of Fabricated Organic Light-Emitting Diodes 45
CHAPTER 5. CONCLUSION 50
LIST OF REFERENCES 52
ABSTRACT (KOREAN) 57
ACKNOWLEDGEMENT (KOREAN) 59
