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In the ever-evolving field of display technology, OLED displays have emerged as a prominent player due to their ability to deliver stunning visuals, energy efficiency, and flexibility.

One key component that has contributed to the success of OLED displays is deuterium, a stable isotope of hydrogen. Deuterium's impact on OLED displays can be seen in its potential to magnify these devices' overall performance and lifespan.

• Deuterium (2H, D): Discovered in 1931 by H. Urey, who won the Nobel Prize in 1934 and named it Deuterium.
• Stable, nonradioactive isotope of hydrogen with one proton and one neutron in its nucleus
• Natural abundance of 0.015% of hydrogen atoms on Earth

Deuterium, a heavier isotope than hydrogen, offers several advantages in OLED displays. First and foremost, deuterium is known to increase the brightness and efficiency of OLED displays. TV Panel manufacturers use OLED materials to generate the 3 primary colours (red, green, blue) in full-colour display. They had a challenge of large electronic power consumption for blue OLED relative to green and red OLEDs. This has been successfully overcome by deuterated blue OLED emitters which provide higher stability and prolonged lifetime, resulting in greater brightness and efficiency.

Taiwan-based PC cases and accessory maker Lian Li is showing a new motorized gaming desk with a built-in  30-inch transparent OLED display.

The DK-07, currently in prototype stage, adopts LG Display's1366x768 transparent WOLED display. The desk is also a PC case. It's not clear what is the use case for the transparent display - the company is saying it can be a secondary display for your computer - and it is also showing a demo in which the transparent OLED displays ocean waves to create a nice effect. The display does not cover the entire desk area, as you can see in the image above.

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Interesting rumors from China suggest that Huawei is planning to release the industry's first smartphone that sports a tri-foldable OLED. When fully open, the device will sport a 10" display, which means it will double as a full tablet and a smartphone. Huawei's plan is to release it in the first half of 2024.

Samsung tri-folding AMOLED prototype

The rumors continue to suggest that Samsung Electronics noticed Huawei's plan, and the Korean smartphone maker may decide to be the first on the market with a novel device, launching its own tri-folding phone - or perhaps even the first rollable phone. 

Samsung and LG have a long history of rivalry, but recently the companies started a surprising collaboration in the OLED industry, when in 2023, Samsung launched its first OLED TV that used WOLED panels produced by LG Display, and recently the company signed a 5-year supply agreement with LGD.

According to recent reports from Korea, this is not an isolated case. The two Korean conglomerates have decided to increase their collaboration in order to increase their competitiveness against rivals, mostly from China. The two companies have formed a "TV alliance", of which the first step is by Samsung to adopt LGD's WOLED panels. LG Display, in return have agreed to use Samsung Display's AMOLED panels in its LG Gram laptop range. This was reported already last year, but we did not know it was part of Samsung's and LG's new strategy of cooperation.

Researchers from the UK's National Physical Laboratory (NPL), together with the Samsung Advanced Institute of Technology (SAIT), released a new study to better understand the degradation of blue OLED devices. 

Close-up of the OrbiSIMS instrument’s vacuum chamber showing the nozzles of the ion beams and electrode that extract ionised molecules for analysis (Picture credit: NPL)

The OLED degradation mechanisms that limit the lifetime of blue OLED emitters, whether physical, chemical or something else, are still not yet fully understood. Understanding the degradation mechanism of blue OLEDs is essential to improve their performance and stability. The NPL / SAIT team used OrbiSIMS, an innovative mass spectrometry imaging technique invented at NPL in 2017, to study OLED degradation. 

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According to recent rumors, LG Display has decided to go ahead and build its 8.6-Gen (2250 x 2600 mm) IT AMOLED line, in Paju, Korea (at its P10 hub, which was originally planned for OLED TV production). The company recently started to conduct discussions with equipment makers for supply agreements.

LG Display's plan is to officially announce its 8.6-Gen production line plans in the second half of the year, and start ordering equipment. It is likely that the capacity of the fab will be between 7,500 to 15,000 monthly substrates. LG will be using its P10 building and existing equipment (backplane deposition) to reduce the costs of the 8.6-Gen line. This will mean that there will be delays to LG's WOLED TV panel capacity expansion plans. 

Researchers Durham University, led by Professor Andrew Monkman, discover new OLED emitters that offer high performance in a hyperfluorescence emission system. The main new material, a molecule called ACRSA, was found to triple the efficiency of hyperfluorescence OLED devices.

These OLED emitters aren't actually new - they were studied years ago, but were found to be poor emitters. That was true when used as OLED emitters, but when used in a hyperfluorescence system (which combines both fluorescent and TADF emitters), these were surprisingly efficient. The ACRSA emits a green emission, but deep blue light emission can be achieved by transferring ACRSA's energy to a blue terminal emitter. This approach reduces exciton energy compared to direct blue emission in devices, allowing more stable, longer-lasting blue OLEDs.

Researchers at Lawrence Berkeley National Laboratory (Berkeley Lab), led by Prof. Peidong Yang, developed a new 3D printing ink based on perovskite materials, that exhibits unity photoluminescence quantum yield (PLQY). Interestingly, as it is a 3D printable ink, it is possible to create luminescent objects from it, as seen in the image below:

The researchers brand the new ink as 'supramolecular ink', and say it is produced without any rare metals. It is a combination of several powders containing hafnium (Hf) and zirconium (Zr), and is made at room temperatures. In a process called supramolecular assembly, tiny molecular building block structures are self-assembled within the ink. These supramolecular structures enable the material to achieve stable and high-purity synthesis at low temperatures.