Fiber light-emitting diodes (Fi-LEDs) could be used to make wearable lighting and displays.

Amazing stuff! Want to look like a Christmas tree or like a billboard?

"... The researchers made their Fi-LEDs by coating thin aluminium fibres with an alumina-based material called a porous alumina membrane.

They then filled the pores in this material with a precursor to a metal-halide perovskite, a type of crystal material with unusual optical and electronic properties. ..."

"... Fiber light-emitting diodes (Fi-LEDs) stand out as a key component in the realm of flexible LEDs because of their compatibility with textile fabrication and excellent spatial luminance uniformity. Metal halide perovskites (MHPs) have emerged as promising light-emitting materials for next-generation LEDs due to their superior optoelectronic properties. ...
a novel approach using porous alumina membrane (PAM) templates on thin aluminum fibers. The PAM, with an ultrasmall pore size of approximately 5 nm, was fabricated on aluminum fibers using a roll-to-roll solution-coating process. The MHP precursor solution was filled into the PAM channels, followed by a surrounding annealing procedure to ensure spatially uniform solvent vaporization and MHP crystallization. This method enables the uniform growth of PeQW arrays and minimizes the formation of unwanted thin-film structures on the PAM surface. ..."

From the abstract:

"Fiber light-emitting diodes (Fi-LEDs), which can be used for wearable lighting and display devices, are one of the key components for fiber/textile electronics. However, there exist a number of impediments to overcome on device fabrication with fiber-like substrates, as well as on device encapsulations. Here, we uniformly grew all-inorganic perovskite quantum wire arrays by filling high-density alumina nanopores on the surface of Al fibers with a dip-coating process. With a two-step evaporation method to coat a surrounding transporting layer and semitransparent electrode, we successfully 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 instill the mechanical bendability, stretchability, and waterproof feature 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 a new vista for advanced lighting with unconventional formfactors."

Lighting you can wear possible with fibre LEDs

HKUST Engineering Researchers Develop Full-Color Fiber LEDs Based on Perovskite Quantum Wires (original news release) "Paving the Way for Advanced Wearable Display Technologies"

Full-color fiber light-emitting diodes based on perovskite quantum wires (open access)

Fig. 1. PeQWs Fabrication.

The futuristic lighting system that offers disinfection and Wi-Fi

Amazing stuff!

"... Juganu (Hindi for “firefly”) is in discussions with Groupe Renault about how its J.Protect LED lighting fixtures could inactivate pathogens, including SARS-CoV-2, in car cabins. ...

Juganu began with a novel streetlight system that doubles as a public Wi-Fi network.

“We created a totally new LED light and a platform on which data of all types can be transferred between the lights,” ...
Founded in 2011, Juganu has installed its connected streetlights in about 20 cities in Israel, Europe and the Americas, including Kalamata in Greece, Villa Nueva in Guatemala and the bridge between Brazil and Paraguay. ...

Here the special twist is blending wavelengths to mimic the gradations of sunlight from dawn to dusk in one smart flexible fixture controlled by a mobile app. ...

“We blended not only the seen light but also invisible light such as UV,” ...

Ultraviolet rays – UVA, UVB and UVC — neutralize bacteria and viruses including SARS-CoV-2, as a recent Tel Aviv University study proved again.

Tests in commercial labs and at Bar-Ilan and Technion universities in Israel showed 90-99.9 percent pathogen-neutralizing effectiveness of UV rays in Juganu fixtures.

UVA, the safest part of UV, is activated continuously. UVC, which is even more effective against pathogens but hazardous to people, is manually activated by application at times when the space is vacant.

“There are safety measures connected to movement detectors and you set the time that the accelerated mode is active. It can be only a few minutes and after that it stops,” ... "

The futuristic lighting system that offers disinfection and Wi-Fi - ISRAEL21c From streetlights with built-in Wi-Fi to overhead lights that neutralize all the germs in a room, this sci-fi invention is already on the market.