Researchers from South China University of Technology (SCUT) demonstrated a new MgO-based OLED encapsulation layer. The researchers say that MgO provides an efficient barrier at a low cost, and can be deposited in low temperatures.

MgO OLED encapsulation tests (SCUT 2016)

The researchers say that this is the first time that MgO is used for OLED encapsulation, but this material has a number of advantages - a low refractive index, a wide bandgap, high dielectric constant, high chemical stability and the lack of UV irradiation treatment requirements.

The researchers managed to develop a process that deposited the MgO barrier layer-by-layer using ALD at temperatures of just 80 degrees Celsius. A test at 60 degrees and 100% humidity showed no damage to the OLED even after 600 hours.

Atomic Force Microscopy for next-gen OLED processesAtomic Force Microscopy for next-gen OLED processes