July 26, 2017: Researchers from Korea’s National University have developed a new method to rapidly transfer OLED layers by high-pressure gas sprays, which can reduce the manufacturing time of OLED panels by about 90%.
The new method uses a air jet technology that sprays gas such as nitrogen, argon and air at high pressures. The gas is sprayed at a speed of 300 m/s between the OLED and a substrate, which reduces the binding power of the OLED from the substrate, and increases the binding energy of the organic layers being transferred. This can be used to rapidly transfer thin films without damage them.
The researchers have found that films transferred using the new process achieved a surface roughness of 5.2 nanometers that is compared to a surface roughness of 473 nanometers with current methods.