Stretch This OLED Display!
“Stretchable electronics promise video displays that could be rolled up and tucked into a shirt pocket, or cell phones that could swell or shrink. Electronic sheets that could be draped like cloth would be a boon for robotic skin and embedded medical devices.
Now engineers at the University of California, Los Angeles, have taken a step toward these handy electronics by creating the first fully stretchable organic light-emitting diode (OLED). Previously, researchers had only been able to create devices that are bendable but can’t stretch, or stretchable pieces that connect smaller, rigid LEDs…
To make their device entirely pliable, the UCLA researchers devised a novel way of creating a carbon nanotube and polymer electrode and layering it onto a stretchable, light-emitting plastic.
To make the blended electrode, the team coated carbon nanotubes onto a glass backing and added a liquid polymer that becomes solid yet stretchable when exposed to ultraviolet light. The polymer diffuses throughout the carbon nanotube network and dries to a flexible plastic that completely surrounds the network rather than just resting alongside it. Peeling the polymer-and-carbon-nanotube mix off of the glass yields a smooth, stretchable, transparent electrode.”