LED luminous thread created in Korea - VIDEO PDF Print E-mail
Friday, 21 August 2015 16:39
Due to boom wearable electronics rapid development taking place in the production of electronic displays, designed for integration into clothing and textiles. Currently, however, for the production of LEDs, designed for use as an elastic and deformable surface on the clothing (or even displays specially tailored biocompatibility) are still used for solids containment electroluminescent material. Engineers from leading Korean Institute of Science and Technology (KAIST) created fibroid LEDs that you can sew or weave itself into the very fabric of the factory. "Our study will be the starting point in the development of technology of fiber light-emitting diodes, which in the future will be one of the key elements in its original fabric," - says Professor Choi, head of the research group from the School of Electrical Engineering at KAIST. "We hope to be able to facilitate and accelerate soft wearable displays on the market." 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, but the poly-p-fenilenvinilea and the organic polymer forming the LED- and OLED-LEDs. Again, the resulting material was dried and finally covered yarn composition of lithium fluoride / aluminum (LiF / Al). Scientists claim that this process is more effective application of LED material on small cylindrical structure, compared with any method of heat treatment. According to researchers, careful control of the rate of extraction of fibers 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 accelerate 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.