以鹽類摻雜來降低有機層之載子注入位障

Abstract

隨著科技不斷進步，光電產業蓬勃發展，有機發光二極體之開發更受人注目，學術界及產業界積極地推動合作，目的就是使OLED得到最大之效能，並且能實際應用於產品。有機發光二極體因電洞、電子注入，並且在有機層內結合放光，因此電洞、電子的結合效率也成為了影響OLED元件發光效率的一個重要因素，若能提高載子的注入量，也會對提高元件發光效率有幫助。本論文實驗於元件之電洞傳輸層及電子傳輸層材料中添加鹽類及高分子材料PEO，藉以更加提升材料的載子傳輸效用，提高電洞、電子的注入效率，且也能達到降低元件操作電壓的功用。實驗中選用幾種常用之電洞、電子傳輸層材料，並且試驗膜厚、鹽類種類及鹽類濃度等參數，測量元件電性，找尋最佳配比。

With technological advancements, the optoelectronics industry is booming. The development of organic light-emitting diode (OLED) has attracted much attention. The academia and industries promote cooperation actively for making OLED to optimize the performance, realizing commercialization of OLED displays. The hole and the electron inject from anode and cathode, respectively, and they combined in the emissive layer. The efficiency of combination is an important factor of luminescence efficiency. If the carrier injection efficiency would be improved, the efficiency of device would be increased. In this thesis, we enhance the carrier injection efficiency by doping salt and ion conductive polymer (poly(ethylene oxide), PEO) in hole transport material and electron transport material and the turn-on voltage can thus be reduced. In the experiment, we choose some materials as hole and electron transport layers. Effects of film thickness, different salts and salt concentrations are studied by measuring the I-V curve of the device to optimize the performance.