Numerical Studies on Structural and Optoelectronic Properties of Organic Light-Emitting Diodes

• Main Authors: Yung-Cheng Chang, 張永政
• Other Authors: Yen-Kuang Kuo
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/71337712292354304343

碩士 === 國立彰化師範大學 === 光電科技研究所 === 94 === Organic Light-Emitting Diode (OLED) has been extensively developed in the past few years. The next generation displays designed by OLED technology have advantages over other displays such as CRT, LCD, and PDP in thickness, weight, brightness, response time, viewing angle, contrast, driving power, flexibility, and capability of self-emission. The OLED display has provided a brand new vision for the human-computer interaction in the future. The structural design of OLED is important because it might effectively increase the possibility of mass production. In this thesis, the optimizations of the optical and electronic properties of multilayer OLED devices are numerically studied. In chapter 1, the characteristics of OLED, including the advantages, disadvantages and structures, are introduced. Moreover, the development of OLED and comparison between OLED and LCD are also disscussed. In chapter 2, we attempt to setup the electronic model to help realize the microscopic physics of OLED. Furthermore, we discuss the optoelectronic model of the APSYS simulation program which we used to do simulation. In chapter 3, we investigate the photoelectric characteristics, including the recombination rate, spontaneous emission rate, and L-J-V curves, for the green- and red-emitting OLED structures and top-emitting OLEDs. The carrier balance at the interface between organic layers affects the electroluminescence (EL) efficiency of OLED. In chapter 4, the optoelectronic properties of the Alq3/TPD heterostructure based multilayer OLED with various thicknesses and positions of hole blocking layer are numerically studied. Finally, optimal design of the multi-quantum-well OLED structure under study is attempted.