KAIST weaves OLED fibres for wearables

January 11, 2018 // By Julien Happich
Researchers from the Korea Advanced Institute of Science & Technology (KAIST) have produced highly efficient fibre-based OLEDs by applying the successive layers of a functional OLED stack around ultra-thin fibres through a dip-coating process.

The researchers identified that solution process planar OLEDs can be applied to fibres without any reduction in performance through the technology. The fibre OLEDs obtained boasted a luminance in excess of 10,000 cd/m 2 with a current efficiency of 11cd/A.

Even operated under tensile strains of up to 4.3%, the fibre OLEDs retained more than 90% of their current efficiency. The researchers then wove and knitted the fibre OLED into textiles and knitted clothes, and demonstrated the OLEDs remained functional, making them applicable to flexible wearable displays.

Fibre-based OLEDs woven into knitted clothes. (Source KAIST)

The low temperature coating process (at around 105℃) is applicable to many types of fibres, with diameters ranging from 300㎛ down to 90㎛, highlight the researchers.

Professor Choi said, “Existing fiber-based wearable displays had limitations for applicability due to their low performance. However, this technology can fabricate OLEDs with high performance on fibers. This simple, low-cost process opens a way to commercialize fiber-based wearable displays.” 

KAIST - www.kaist.edu


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