Fabrication and Characterization of Organic Light-Emitting Diodes with Nitrogen and Iodine Dual Dopants System

• Main Authors: Shui-Ching Hou, 侯水欽
• Other Authors: Yean-Kuen Fang
• Format: Others
• Language: en_US
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/64249501613221201213

碩士 === 國立成功大學 === 微電子工程研究所碩博士班 === 92 === In this thesis, we report the study of improving the photoelectric characteristics of bi-layer organic light-emitting diodes (OLEDs) by introducing N2 gas into evaporation chamber to co-deposit with different organic layers and incorporating I2 with various weight ratio into OLEDs in the same way. Experimental results show that the OLEDs with inorganic nitrogen or iodine can achieve smaller operating voltage and higher luminance due to the interfere action of guest hopping traps, caused by the dopants to the host hopping traps. However, these single dopant systems (doping N2 or I2) can’t apply for advanced high luminescence OLEDs due to the saturation of the interfere function between the guest and host hopping traps. Therefore, incorporation of both N2 and I2 to form “Dual Dopants System” was developed and focus the dual dopants system can improve the performance better than single dopant system. A comprehensive model has been proposed to explain the improvement mechanism