Researchers create full-color fiber light-emitting diodes based on perovskite quantum wires

Researchers from the Hong Kong University of Science and Technology, Sun Yat-sen University and Nanjing University of Science and Technology have uniformly grown all-inorganic perovskite quantum wire arrays by filling high-density alumina nanopores on the surface of Al fibers with a dip-coating process. 

Fiber light-emitting diodes (Fi-LEDs), which can be used for wearable lighting and display devices, could be a key component for fiber/textile electronics. However, as a number of challenges exist with this technology, researchers are trying to address issues like on device fabrication with fiber-like substrates, as well as on device encapsulation.


Using a two-step evaporation method to coat a surrounding transporting layer and semitransparent electrode, the scientists fabricated full-color Fi-LEDs with emission peaks at 625 nanometers (red), 512 nanometers (green), and 490 nanometers (sky-blue), respectively. 

Intriguingly, additional polydimethylsiloxane packaging helps promote mechanical bendability, stretchability, and waterproof features of Fi-LEDs.

The plasticity of Al fiber also allows the one-dimensional architecture Fi-LED to be shaped and constructed for two-dimensional or even three-dimensional architectures, opening up new possibilities for advanced lighting with unconventional formfactors. 

Posted: May 16,2024 by Roni Peleg