Electroluminescent display is stretchable

November 01, 2019 //By Julien Happich
A team of researchers from Nanjing University have devised an electroluminescent display that can be stretched thin while operating from a low voltage.

The proof-of-concept presented in a paper titled "Stretchable High-Permittivity Nanocomposites for Epidermal Alternating-Current Electroluminescent Displays" published in ACS Materials, consisted of an electroluminescent layer made of light-emitting microparticles dispersed in a stretchable dielectric material, sandwiched between two flexible silver nanowire electrodes.

To improve upon prior art alternating-current electroluminescent (ACEL) displays, the researchers used a new type of dielectric material that increased the brightness of the display. The surface-modified ceramic nanoparticles blended into polar elastomers effectively concentrates electric fields onto phosphor, enabling a low-voltage operation of the stretchable electroluminescent display, the authors report. They then used this material to make a four-digit stopwatch display, which they mounted onto a volunteer's hand. At low voltages, the stretchable display was sufficiently bright to be seen under indoor lighting. The researchers envisage such a stretchable display to be used in a broad range of applications including smart wearables, soft robotics and human-machine interfaces.

Nanjing University - www.nju.edu.cn

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