| 초록 |
The conventional OLED have bottom emission structure where emitted light is partially blocked by bottom layer TFT and data line. To improve aperture ratio and minimize the effect of TFT on active matrix panel, the research and development of Top emission organic light emitting devices (TEOLEDs) is inevitable. Top emission inverted OLEDs (TEIOLEDs) would render feasible use of generally superior n-type transistors rather than p-type transistors in the active matrix OLEDs (AMOLEDs) pixel circuitry and further enhance performance. Highly efficient TEIOLEDs can be prepared by the reflective bottom cathode providing effective electron injection. Many researchers have proposed inverted TEOLEDs by inserting an ultra thin insulating layer between the organic layer and metal electrode to increase electron injection from cathode, thereby enhancing the luminance efficiency. In this study, we investigated to improve the efficiency of cathode electron injection. |
