UCLA Researchers Demonstrate Light-Emitting Polymers that stretch out like Rubber

Published By : 03 Jan 2014 | Published By : QYRESEARCH

Today, stretchable electronic is an upcoming and the most emerging course of modern electronic materials. As its name suggests, stretchable electronics can bend and stretch in any form, and can be used in a wide range of electronic applications such as smart skins, wearable electronics, and biomedical devices that function with the movement of the body.  

For the first time in the history of research, learned researchers at the UCLA Henry Samueli School of Engineering and Applied Science verified an intrinsic stretchable form of polymer light-emitting device. With the help of single-walled carbon nanotube polymer composite electrodes, UCLA researchers managed to fabricate the transparent devices. Moreover, the interpenetrating meshwork of the polymer matrix and the nanotubes in the surface of the composite electrodes lead to a condition of low sheet resistance, high compliance, high transparency, and low surface roughness. 

These devices can easily stretch up to 45 percent, with composite electrodes reversely stretching up to 50 percent with a slight change in the sheet resistance.

The formal in-organic electronic devices are generally brittle. Although they have some amount of flexibility via ultrathin layers of inorganic materials, the devices are either stretchable or flexible consisting of a discrete LED chip organized with stretchable electrodes. However, they majorly lack intrinsic stretchiness.    

In comparison to the above conventional devices, the metal-free stretchable electronic devices are a much better option. They are fabricated by roll lamination method whereby two composite electrodes are sandwiched in the emissive polymer layer. Due to this unique development, the field experiences a new direction of stretchable electronics in several industrial applications. Stretchable electronic devices uniquely combine the ability for heavy-strain deformation and mechanical robustness in one single-unit. These physical properties are possible because of the shape-memory property of the composite electrodes.
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