| 초록 |
These days, many research groups show interest in Polymeric Light Emitting Diodes(PLEDs) for the next generation display due to the low power consumption, the fast reaction time, the wide viewing angle and the simple process of fabrication. In this research area, the high extraction efficiency is one of key points for getting good performance PLEDs. However, it is reported that just 20% of the emitted light from a PLED can escape the device as usuful radiation. And another 80% of the light is lost and useless because of total internal reflection at the boundaries of layers with different refractive indices. To extract these waveguided light, we introduced a 2D titania inverse opal film which consists of a regular arrangement of spherical void spaces containing air and solid walls. Due to the uniform arrangement of air and solid walls with a high refractive index, it has photonic crystal property. Using this structure, we enhanced the extraction efficiency. |
