A numerical method was used to solve the bipolar injection problems for the multilayer organic light emitting diodes. The drifting motion of carriers under electric field and Langevin recombination in the emissive layer were considered, and the interface properties were quantified as ratio of injection to total current intensities. The electrical properties were analyzed with various thicknesses of the ETL, EML and HTL. The results show that the thickness of the EML plays an important role in the electric current and luminescent efficiency. To improve the luminescent efficiency, the thickness of the HTL or EML should be reduced. The reduction of the EML will significantly improve the performance of the multilayer OLEDs.
|Journal||Proceedings of SPIE - The International Society for Optical Engineering|
|State||Published - 2006|
|Event||ICO20: Display Devices and Systems - Changchun, China|
Duration: 21 Aug 2005 → 26 Aug 2005
- Electrical properties
- Organic light emitting diodes
- The emissive layer