Tattooable OLED anyone? Researchers at University College London have created an OLED that can be applied to skin like a children’s transfer tattoo.
So much like a child’s transfer is it, that it is made on the same type of substrate and applied the same way: wet it, stick it, and peel off the backing paper.
The OLED starts life as a sheet of commercial ‘tattoo paper’ – this is already a laminate of a smooth-surfaced paper called glassine that is coated with a water soluble starchy layer, then topped with a water-resistant layer of ethylcellulose – the latter of which is usually printed on to make the tattoo image.