One of the major factors reducing OLED efficiency is the surface plasmon polariton (SPP) mode, which occurs at the interface between the metal electrode and the organic layer. To minimize this loss, we have applied Dipole Orientation Control technology to significantly enhance light extraction efficiency. 

Through FDTD simulation analysis, we confirmed that removing the air gap and optimizing molecular orientation minimizes internal optical loss and enables more uniform light emission. This advancement establishes a core technology for next-generation OLED displays and optoelectronic devices, paving the way for applications in ultra-high-resolution displays, AR/VR optical systems, and various other fields.

Adv. Optical Mater. 2021, 9, 2002182

The microcavity effect is an optical resonance technology that controls the direction and intensity of light. Unlike conventional semi-transparent electrodes that emit light in random directions, the microcavity effect enhances specific wavelengths of light into a resonant state, increasing output intensity and improving color purity.

Additionally, IR-to-visible conversion devices utilizing the microcavity effect demonstrate exceptional performance in pixel-free IR imaging. When exposed to infrared (IR) radiation, the microcavity structure optimally combines light reflected from the lower layer with light emitted from the upper layer, significantly enhancing brightness and contrast. This technology enables sharper IR imaging compared to conventional silicon-based CMOS IR sensors, while also offering cost-saving benefits.

Adv. Funct. Mater. 2023, 33, 2214530

To revolutionize light extraction efficiency and viewing angle characteristics in next-generation OLED displays, we have introduced the Imprinted Random Micro Lens Array (IRMLA) structure. Traditional micro lens arrays (MLAs), which are arranged in a regular pattern, tend to create Moiré patterns and enhance light only in specific directions. In contrast, IRMLA utilizes randomly distributed microlenses, effectively eliminating these issues while maintaining high optical efficiency.

IRMLA maximizes light extraction efficiency by suppressing surface plasmon polariton (SPP) modes, reducing internal optical losses. The randomly oriented microlens structure scatters light in various directions within the OLED, significantly reducing viewing angle dependency, which is a common drawback of conventional microcavity structures.

ACS Photonics 2024, 11, 4606−4615