OLED application

- Feb 27, 2019-

Professor kyung cheol choi from the Korea Institute of Electrical Engineering and his team have made remarkable achievements on ultra-thin LEDs. The study, led by Ph.D. candidate Seonil Kwon, was published online on December 6th in the International Nanomagazine, Nano Express. According to the team's prediction, this efficient and long-lasting LED technology will be widely used in wearable displays.

Current wearable displays are generally based on OLED screens, and existing screens do not achieve good display performance due to the size limitations of wearable devices.

To solve this problem, the kyung team designed an OLED structure that is compatible with fibers. The team successfully designed fiber-based OLED LEDs by dip coating the three-dimensional structure of the fibers.

The team also confirmed that the fiber-optic diodes withstand 4.3% tensile strain while maintaining a 90% current efficiency. Moreover, they can be woven into textiles and knitwear without causing any problems.

In addition, this technique allows the fabrication of organic diodes on fibers that are thinner than human hair. It should be noted that all work is carried out in a low temperature environment of minus 105 degrees.

Professor Choi said: "The existing wearable displays have limitations in applicability due to their low performance. However, this technology can produce high-performance fiber-optic organic diodes. This simple, low-cost process is Fiber-optic wearable displays open up a commercial path."