Researchers from Korea's KAIST institute developed a technology to deposit OLED materials on thin fibers, ranging from 90 to 300 micrometers. The OLED on fibers had a luminance of 10,000 cd/m² and efficiency of 11 cd/A.

The researchers developed a unique OLED device architecture, which they say is more suitable for coating on fibers. The researchers also developed a "deep coating" process to deposit the OLEDs, which works under 105 degrees Celsius.