Renyuan Yang

Date of Graduation


Document Type


Degree Type



Statler College of Engineering and Mineral Resources


Lane Department of Computer Science and Electrical Engineering

Committee Chair

Xianan Cao

Committee Co-Chair

Parviz Famouri

Committee Member

Mark A Jerabek


Organic light-emitting diodes (OLEDs) are very promising and considered as the next generation display and lighting sources due to their important merits, such as light weight, area-emission, vivid colors and flexibility. Over the last two decades, the OLED technology has drawn considerable research interest. Significant progress has been made, leading to much improved device reliability, luminance efficiency, and manufacturability. In the OLED family, phosphorescent OLEDs (PhOLEDs) are intrinsically more efficient than fluorescent OLEDs. However, compared with green and red PhOLEDs, blue PhOLEDs are considered as the 'weakest' mainly due to their low reliability, which is a great bottleneck limiting their commercial applications. Despite considerable scientific and technical efforts in recent years, the underlying mechanisms have not been fully understood and the problem remains to be solved. The goal of this work is to fabricate PhOLEDs with blue-emitting FIrpic doped in different host materials and investigate material factors contributing to fast degradation of blue PhOLEDs. (Abstract shortened by ProQuest.).