| 초록 |
Organic light-emitting diodes (OLEDs) have attracted considerable attention as a next-generation lighting. Their enhanced organic materials and device structures have led to highly enhanced efficiency and lifetime. However, the biggest challenge of conventional OLEDs is the limited light outcoupling efficiency about 20 % while the internal quantum efficiency of OLEDs approaches almost 100 %. The low light outcoupling efficiency is attributed to the trapped light in each layers due to total internal reflection resulting from different refractive index of each layer. In this work, we report enhanced light outcoupling efficiency in solution-processed organic light emitting diodes by using a nanoparticle-embedded hole transport layer (HTL), which results in corrugated surface of HTLs. We expect that the solution-processable nanoparticle-embedded hole transport layer can be a simple, cost-effective approach to realize high performance OLEDs. |
