Technical / research

The 2023 Nobel Prize in Chemistry awarded for the discovery of quantum dots

The prestigious Nobel Chemistry prize for 2023 was awarded to Moungi Bawendi, Louis Brus and Aleksey Ekimov, the three scientists that discovered quantum dots.  The Nobel prize is worth 11 million Swedish crowns (around $1 million), and will be split between the 3 winners.

The Royal Swedish Academy of Sciences, that awards the prize, stated that "Researchers believe that in the future they (QDs) could contribute to flexible electronics, tiny sensors, thinner solar cells and encrypted quantum communication".

Read the full story Posted: Oct 06,2023

MIT researchers precisely assemble quantom rods arrays using folded DNA scaffolds

Researchers from MIT have devised a new method to precisely assemble arrays of quantum rods, using scaffolds made of folded DNA. Using this method, the orientation of the rods can be controlled, which is a key factor in determining the polarization of light emitted by the quantum rods array.

The method starts by attaching the quantum rods to diamond-shaped DNA origami structures, built at an exact size required by the device. The structures are then attached to a surface, where they fit together "like puzzle pieces". 

Read the full story Posted: Aug 16,2023

Samsung developed an all-printed 12.4" 182 PPI EL-QD display

Researchers from Samsung Display, led by Changhee Lee, developed an all-inkjet-printed 12.4" full color 182 PPI EL-QD display, that offers improved performance.

The researchers say that by controlling carrier transport properties and charge balance through ligand exchange in QDs and ZnMgO surface, they were able to create this display that has a potential for low cost and material-consumption-efficient display manufacturing. The researchers will disclose the paper at SID Displayweek 2023 next week.

Read the full story Posted: Apr 21,2023

Researchers find that low-temperature processed PTAA HTL improves the performance of flexible QDEL devices

Researchers from Kyung Hee University and the Korean Institute of Science and Technology have demonstrated that a low-temperature processed PTAA hole transport layer (HTL) can improve the performance of flexible light emitting quantum dots (QD-EL, or QLEDs) - produced on plastic substrate.

The researchers say that using a low-temperature process ensures that the flexible substrate is not deformed. Such QLED devices suffer from low performance compared to glass based devices that use optimal PTAA HTLs, but the new process and materials improve the flexible devices closer to glass based ones.

Read the full story Posted: Mar 08,2023

New "giant" QDs emit light for over 500 nanoseconds following an exciton state

Researchers led by a team from the University of Chicago developed a new method to synthesize large-area ("giant") light-emitting QDs that emit light following an exciton state for over 500 nanoseconds, which is a new record.

The new QDs are based on a structure that allows the electrons to focus on holes within a core or shell heterostructure. This is performed by tuning the charge electron to the kinetic energy of a parabolic potential energy surface.

Read the full story Posted: Dec 13,2022

Researchers from the University of Japan develop a narrow-spectrum blue QD emitter

Developing blue-emitting quantum dots is highly challenging, and researchers from the University of Tokyo says that using a new bottom-up design strategy and self-organizing chemistry they have managed to create a high purity blue-emitting QD material (with a narrow emission spectrum).

The new QDs are made from special chemical composition that combines both organic and inorganic substances, such as lead perovskite, malic acid, and oleylamine. The materials self-aligned into a cube of 64 lead atoms. The lead researcher, Professor Eiichi Nakamura, says that "it took over a year of methodically trying different things to find that malic acid was a key piece of our chemical puzzle".

Read the full story Posted: Nov 08,2022

Toray Research Center to host a QD, OLED and MicroLED technology webinar

In the next two weeks, Toray Research Center (TRC) is hosting online webinars focused on display technologies. TRC, who supplies technical analysis and support for R&D and manufacturing, invites you to attend the online lectures at no cost, to learn more about QD, microLED and OLED technologies.

Toray Research Center TRC banner

The webinars include recorded presentations, which will be available online up until to November 22. You can register for the webinars here.

Read the full story Posted: Nov 08,2022

Newly-developed perovskite QDs are promising for display color conversion applications

Researchers from the Beijing Institute of Technology and MIIT have developed perovskite quantum dots microarrays with strong potential for quantum dots color conversion (QDCC) display applications.


Perovskite quantum dots microarrays with strong potential for QDCC applications, including photonics integration, micro-LEDs, and near-field displays. Image from Nano Research

Perovskite quantum dots (PQDs) hold potential as an attractive material and can resolve some of the problems found in conventional QDCC. While perovskite quantum dots are relatively new, they have already been shown to have attractive properties that make them extremely suited for electronic and optoelectronic applications.

Read the full story Posted: Jun 11,2022

Researchers develop efficient SiQD LEDs from recycled rice husks

Researchers from Japan's Hiroshima University developed a new technique to create efficient silicon quantum dots from recycled rice husks. Rice husk is a good source of high-purity silica (SiO2) and silicon powder.

The researchers created SiQDs that luminescence in the orange-red range with a high luminescence efficiency of over 20%. From the QDs the researchers created LEDs based on ITO glass substrates, using spin-coating to process the SiQDs.

Read the full story Posted: Apr 15,2022

Notion Systems installs an inkjet printing system at ITRI for QLED and OLED R&D

Notion Systems, a leading solution provider for industrial inkjet systems, announced that it had successfully installed an n.jet display system at Taiwan's Industrial Technology Research Institute (ITRI). The n.jet display system was developed in collaboration with MBraun/Germany and includes a fully integrated inert glove box solution that combines compact design with minimized nitrogen consumption.

ITRI is now using the new n.jet display system to research and develop novel QLED and OLED technologies. ITRI is looking to replace vapor deposition and vacuum coating with inkjet printing which could reduce the number of steps, increase material utilization and increase display quality.

Read the full story Posted: Feb 19,2022