Researchers from Seoul National University, together with LG, use a 20 years old fluidic process to efficiently self-assemble microLEDs

Researchers from Seoul National University, in collaboration with LG Electronics, developed a new transfer process for microLED displays, based on a fluidic process.

The new process, called Fluidic Self‑Assembly (FSA), starts with a collection of microLEDs (chiplets) dispersed in an assembly solution, and a display substrate in which the binding targets are coated with molten solder. The substrate is immersed in the fluid, and then the fluid is set in motion (is shaken), which causes the microLED chiplets to make repeated contact with a binding targets. When a microLED chiplet meets the binding target, surface tension induces an irreversible bond between the solder and a metal electrode on the chiplet.

Read the full story Posted: Jul 28,2023

Toray Industries developed a new conductive bonding material for microLED production

Toray Industries announced that it has developed a new conductive bonding material that works at lower temperatures (110 degrees Celsius) and pressures (5 megapascals) compared to existing materials, and is suitable for microLED processes. 

Toray's new material is based on the company's RAYBRID photodefinable conductive material (produced from metals, glass, ceramics and other materials), combined with nanocarbon and adhesives. The company plans to start producing the new material by early 2025.

Read the full story Posted: Jul 26,2023

Researchers from the University of Strathclyde develop a continuous roller microLED transfer-printing process

Researchers from the UK-based University of Strathclyde, led by Dr. Eleni Margariti, developed a new microLED transfer process, based on a continuous, single shot roller transfer printing process.

The researchers say that this process can enable large-scale integration of microLEDs. The system they developed can transfer an array of 320x240 pixels (over 75,000 microLEDs) in a single shot, with sub-micron relative position accuracy. The transfer printing process preserves the array geometry with pixel spatial location error less than 1 µm deviation from the as-designed layout. 

The researchers also employed an automated sub-micron precision metrology system based on simple optical microscopy, to asses such large device populations and allow the assessment of yield.

Read the full story Posted: Jul 15,2023

Researchers from MIT developed a bottom-up technique to form perovskite microLEDs

Researchers at MIT have developed a bottom-up approach for precise and scalable formation of perovskite nanocrystal arrays with deterministic control over size, number, and position. This new technology enables the deposition of halide perovskite nanocrystals with precise control over the location and size of each individual crystal, integrating them into nanoscale light-emitting diodes.

Researchers grow precise arrays of nanoLEDs image

The researchers demonstrated deterministic arrays of CsPbBr3 nanocrystals with tunable dimensions down to <50 nm and positional accuracy <50 nm.

Read the full story Posted: Jul 08,2023

Meta launches a 5 million Euro AR research project at Tyndall National Institute

Meta announced that has entered into a research partnership with Ireland-based deep-tech research centre Tyndall National Institute. Tyndall launched a four-year project to help advance AR technologies.

Meta will invest €5 million in this project, which will focus on key AR technologies, including the investigation of the efficiency of microLED microdisplays based systems. The project will be led by Prof. Paul Hurley.

Read the full story Posted: Jun 24,2023

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