LED/OLED Design Using Mixed-Level Simulation

Dan Herrmann CAE Manager, Synopsys Introduction Over the last two decades, there has been extensive research to improve the design of light-emitting diodes (LEDs) to enhance light extraction efficiency, improve beam shaping, and allow color tuning. Techniques such as patterned substrates, polarization-sensitive gratings, back reflectors, surface textures, and phosphor down-conversion have all been explored. Moreover, organic light-emitting diodes (OLEDs) have also garnered much attention in recent years due to their low cost, simple fabrication processes, thin film structure, and good spectral range. OLEDs can be fabricated on both rigid and flexible substrates, making them desirable for a wide range of applications such as color displays and solid state illumination.