June 26, 2022
Flexible Organic Light-Emitting Diode Display
Flexible Organic Light-Emitting Diode Display

 

Atomic layer penetration technology allows the formation of nanometer-thick polymer-inorganic hybrid barrier layers on polymer materials for flexible organic light-emitting diode (OLED) displays. In this study, as a result of transmission electron microscopy and secondary ion mass spectrometry analysis under various process conditions, a polymer-inorganic hybrid nanolayer was successfully formed in the polymer and showed excellent blocking performance with low water vapor transmission rate under optimal conditions. process conditions.

In addition, gas chromatography-mass spectrometry measurements after UV testing showed that polymer outgassing was reduced compared to bare polymer. Based on the barrier properties, a polymer having a polymer-inorganic hybrid barrier nanolayer was applied as a substrate to a flexible OLED display. In storage tests and folding tests, flexible OLED displays show superior reliability and better flexibility compared to displays using inorganic barrier layers. These results confirm that the polymer-inorganic hybrid nanolayer is suitable for forming a barrier layer of a flexible OLED display.

Water and oxygen have been proven to be major contributors to degradation in many applications such as solar systems, batteries, food packaging, electromechanical systems, and displays. Therefore, blocking technology to prevent moisture and oxygen permeation is a key task, and many industry-university researchers are actively researching to improve the performance of this technology1,2,3,4,5,6,7,8. Recently, OLED (Organic Light Emitting Diode) displays, which exhibit high color gamut, fast response time, low power consumption, and wide viewing angles compared to other display technologies, have been commercialized and are playing an important role in the display field for smartphones, tablets, personal computers, laptop and television.