| Summary: | 碩士 === 國立臺灣大學 === 光電工程學研究所 === 98 === Organic light emitting diode (OLED) is one of the most popular technology in the 21 century. However, there are many obstructions needing to be overcome. Therefore, how to improve the performances of organic devices, such as the stability and the current- voltage characteristics, is an important issue.
This thesis focuses on the characteristics of hole injection and transport in organic light emitting diodes (OLEDs). In order to improve the performance of organic devices, the multi-layer OLED structure is used. For example, by inserting functional layers, such as an electron injection layer (EIL) and hole injection layer (HIL), the carrier injection can be enhanced.
In the experiments, C60 was evaporated on ITO anode as a hole injection layer. Moreover, the devices using the NPB doped with C60 as a hole transport layer are also fabricated to enhance the hole transportation in OLEDs. Therefore, this thesis investigates the effects of C60, as HILs or HTLs in OLEDs.
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