P‐153: Exciton Distribution and Microcavity Effects in Designing Top Emitting OLED Devices

Micro-cavity and exciton distribution are investigated in top-emitting organic light-emitting diode (OLED) devices having a highly reflective anode patterned over silicon wafers. A narrow (delta-doped) sensing layer method was used to obtain the exciton distribution profile for various dopant combinations using a single or a double emissive layer. Results are compared to OLED with lower reflectivity anode. The exciton diffusion length plays a critical role in tuning the color coordinates of the emitted light when multiple emission layers are used in combination with microcavity to achieve a white top emitter OLED.