Technical / research

NS Nanotech reports the fabrication of submicron native-red nanowire microLEDs with EQE of 8%

NS Nanotech announced that its researchers from the University of Michigan, led by the company's co-founder Prof. Zetian Mi, has developed a native red sub-micron microLED device with an EQE of over 8%. The company says that this is the world's most efficient submicron-scale LED.

NS Nanotech has an exclusive license to commercialize prof. Zetian's LED technology and technologies developed at McGill University. The company grows unique nanowire LEDs using MBE technology.

Read the full story Posted: May 21,2023

Unleashing the Power of Ultra-Precise Deposition for Modern Electronics with XTPL Delta Printing System

This is a sponsored post by XTPL

Say hello to the future of electronics with Ultra-Precise Deposition (UPD) technology! This cutting-edge method allows us to create intricate, high-resolution electronic devices with greater flexibility and precision than ever before. UPD is set to revolutionize the world of additive manufacturing, offering a much-needed solution for printing conductive and insulating structures on complex substrates.

So, what is UPD, and why is it such a game-changer? It's a unique way of printing conductive and insulating materials onto various surfaces, both rigid and flexible. It helps fix defects in OLED displays and connects the tiny components in microLED arrays. The best part? It's versatile and adaptable to a wide range of applications, from flexible electronics to solar cells and MEMS devices.

Read the full story Posted: Apr 14,2023

Researchers fabricated full-color flexible microLEDs using perovskite QD color conversion

Researchers from Korea's KIMM institute have fabricated full-color flexible microLED devices, using blue LEDs and perovskite quantum dot color conversion layers. The demonstrated device featured  1 mm pixel pitch LEDs (25.4 PPI) and could be bent with a radius of 5 mm without being damaged.

The researcher used a perovskite-QD and siloxane composite using ligand exchanged PQD with silane composite followed by surface activation by an addition of halide-anion containing salt. Due to this surface activation, the researchers say that it was possible to construct the PQD surface with a silane ligand using a non-polar organic solvent that does not damage the PQD. As a result, the ligand-exchanged PQD with a silane compound exhibited high dispersibility in the siloxane matrix and excellent atmospheric stability.

Read the full story Posted: Mar 27,2023

KAIST researchers discover a way to create microLEDs that are not sensitive to sidewall defects

Researchers from Korea's KAIST have found that by changing the epitaxial structure of microLEDs, it is possible to fundamentally resolve the problem of efficiency degradation in microLED devices. In other words, it is possible to create microLEDs in which the efficiency does not drop with size. 

The researchers discovered that the specific epitaxial structure of the microLED changes how the current drives to the sidewall of the microLEDs. Based on that, the researchers developed a epitaxial structure that is not sensitive to sidewall defects. The proposed structure also reduces generated heat by about 40% compared to standard microLEDs.

Read the full story Posted: Mar 27,2023

JBD announces a 750,000 nits red emitter, updates on its latest microLED research activities and goals

China-based MicroLED microdisplay developer Jade Bird Display announced that it has developed a higher-efficiency AlGaInP-based (native) red microLED, that achieves a brightness of 750,000 nits, an increase of 50% compared to its currently-used emitter. The company says that this it the industry's brightest native red emitter.

Red microLED array, JBD

JBD says that it managed to redistribute the local charge carriers by a breakthrough in surface treatment process and in this way, minimize the surface non-radiative recombination and boost the efficiency. The company says it expects to implement this technology in mass production by middle of 2023.

Read the full story Posted: Feb 26,2023

Researchers develop the world's highest density and smallest microLED arrays, using 2D material based transfer

Researchers from the US and Korea, led by MIT, developed full-color vertically-stacked microLEDs that achieve the highest array density (5100 PPI) and the smallest size (4 µm) reported to date.

To end up with such high resolution and small microLED chip size, the researchers used a 2D materials based layer transfer (2DLT) technique. The resulting microLEDs, that have near-submicron thickness, are grown on 2D material-coated substrates, removed, and then stacked.

Read the full story Posted: Feb 02,2023

Sundiode and Soft-EPI successfully grew a monolithic all-InGaN stacked-RGB LED structure

Stacked-RGB microLED microdisplay developed Sundiode announced that it has achieved the successful growth of a monolithic, all-InGaN RGB LED structure on a single sapphire wafer. This structure was developed in collaboration with Soft-EPI.

Sundiode's epitaxial technology enables stacked-RGB LEDs with multiple junctions, capable of emitting RGB colors independently. This structure makes it easier to produce ultra-high density microdisplays.

Read the full story Posted: Jan 11,2023

The MicroLED Industry Association to host a Perovskite microLED technology webinar

On March 27 the MicroLED Industry Association will host a private webinar on perovskite materials for the microLED industry. Perovskite materials hold great promise for the solar industry and in recent years we are seeing promising signs for the adoption of perovskites the display industry.

Researchers Fabricate Large-area Sky-blue PeLEDs image

The upcoming Seminar will feature four world-leading speakers, and will also be open to a Q&A session. We will learn more about the state-of-the-art perovskite research and development, with a focus of course on applications in the microLED industry - for both perovskite QDs and PeLEDs.

  • Prof. Henry Snaith FRS: leading the Photovoltaic and Optoelectronic Device Group at Oxford University, founder of Oxford PV and Helio Display Materials
  • Simon Jones: CEO at Helio Display Materials, a perovskite material developer focusing on the display market, spun off from the UK's Oxford and Cambridge universities
  • Prof. Lioz Etgar: leading perovskite researcher, Associate Professor of chemistry at the Hebrew Univeristy of Jerusalem, Israel
  • Samuel Halim: CEO at electronics material developer Avantama

The MicroLED Industry Association was established with an aim to speak in a unified voice and promote microLED display solutions. The association works to improve communication, collaboration and partnerships within association members and assist its members in reaching their marketing and development goals. The association currently lists 29 members, including LG Electronics, 3M, PlayNitride, the Fraunhofer Institute (IZM and FEP), Coherent, Lextar/Epistar and many more.

Read the full story Posted: Dec 20,2022

Toshiba develops a new high-performance phosphor for microLED color conversion

Toshiba Corporation announced that it has developed a new high-performance phosphor material that could be highly useful in microLED color conversion, among other applications. Toshiba aims to start mass producing the new material in 2025, and will soon offer samples for potential partners and customers.

Toshiba says that the new material delivers excellent solubility in polymers or organic solvents, where it is transparent and colorless under visible light, and that emits persistent red-light emissions under UV light, with excellent color purity and a luminescence six times that of current phosphors.

Read the full story Posted: Dec 15,2022

KAIST researchers use an array of microLEDs to create a wearable skin care patch

Researchers from Korea-based KAIST institute developed a microLED-powered wearable patch that acts as an UV-induced inhibitor for melanogenesis, the creation of brown or dark pigments that can lead to skin diseases.

LEDs have been used to photo-stimulate in skin care, but normal devices cannot conform to the skin shape, they operate from a distance which is problematic. If the patch is connected to the skin, it achieves much more effective photo-treatment. In this research, the team fabricated a 4x4 cm2 wearable device made from an array of 100-micron sized microLED chips, vertically interconnected for high flexibility.

Read the full story Posted: Nov 23,2022