Due to boom wearable electronics is rapid development in the production of electronic displays, designed for integration into clothing and textiles. Engineers from leading Korean Institute of Science and Technology (KAIST) created fibroid LEDs,that can sew or weave itself in factory cloth.
For the production of the new LED strands scientists started with polyethylene terephthalate fibers, which are repeatedly dipped into a solution of organic conductive polymer PEDOT: PSS (poly-3,4-ethylenedioxythiophene) and polystyrene sulfonate, and then dried at 130 degrees Celsius for 30 minutes. After that, the material again was placed in a yellow solution, forming the LED- and OLED-LEDs. Again, the resulting material was dried and finally covered yarn, composition from lithium fluoride / aluminum (LiF / Al).
Scientists claim that this process is more effective method of application of LED materials on small cylindrical structure, compared with any method of heat treatment. According to researchers, careful control of the speed of extraction of fiber from the solution allows you to control the thickness of the deposition of up to hundredths of thousandths of a nanometer.
The researchers believe,that their method of production of fiber LEDs may speed up the commercialization of wearable displays, as the process can be automated and make quite low. In this case, to establish mass production of fiber LEDs will be as easy as the current production of nylon or polyethylene fibers.
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