The researchers worked for three years and have now published a new article in the journal Nature, where they explain in detail
Their invention is based on a new methodto obtain an elastic light-emitting polymer: it is very bright and works like a filament in a light bulb. The display itself is made of synthetic plastic materials. The maximum brightness of the device is about twice that of a conventional phone. It can also be stretched twice.
Stretchable displays can provide a newway of interactive interaction between man and machine. You can look at the image and interact with it, and then the display will change according to our reaction.
Zhennan Bao, professor at the K. K. Li School of Engineering and senior author of the paper
Most light emitting polymers are rigid andcrack when stretched. Scientists can increase their flexibility by adding elastic insulating materials such as rubber. But these additives reduce electrical conductivity, so high voltage is needed to generate even dim light, and this is potentially life-threatening.
About three years ago, graduate student Zhitao Zhangdiscovered that a yellow, light-emitting polymer—Superyellow—not only becomes soft and pliable, but also emits brighter light when mixed with a type of polyurethane.
Unlike rubber, nanofibers providedisplay softness and does not interfere with the flow of electricity. Following this discovery, the group also created flexible red, green, and blue light-emitting polymers. Then she connected the remaining components of the electronic display.
As a result, the device contains seven layers.The two outer ones are substrates that enclose the display in something like a capsule. Inside there are two layers of electrodes and a light-emitting layer, which is located in the center.
The result was an all-polymer film,which can be glued to a hand or finger: it does not tear when bent. Using it, you can create wearable trackers and attach them directly to the skin.
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