AsianScientist (Jun. 12, 2015) – Researchers in Korea have fashioned wearable LED technology that is ultrathin and can be applied to human skin like a sticker.
The technology behind this involves quantum dot light emitting diodes (QLED) arranged in arrays, in what could be thought of as an ‘electronic tattoo.’ Researchers from the Institute for Basic Science (IBS) and Seoul National University aligned the QLEDs in a red, green and blue array using a technique called intaglio transfer printing. The technique allowed the QLEDs to be aligned at resolutions approaching 2,500 pixels per inch, which is far superior than other LEDs and smartphone displays commercially available today.
The QLED devices were shown to be stable on curved and convoluted surfaces, and withstood mechanical deformations such as bending, crumpling and wrinkling.
Colloidal quantum dots have attracted great attention as next generation displays. They have unique properties such as color tunability and stability, and can be printed on a variety of substrates.
The researchers say the technology is scalable, bringing with it the possibility of integrating high-definition full color displays into wearable electronics.
The article can be found at: Choi et al. (2015) Wearable Red-green-blue Quantum Dot Light-emitting Diode Array Using High-resolution Intaglio Transfer Printing.
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Source: Institute for Basic Science.
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