Power consumption

Researchers from Korea develop a new OLED intermediate layer material to improve the performance of blue phosphorescence OLED emitters

Researchers from Korea's UNIST institute, together with colleagues from Sungkyunkwan University have developed a new OLED intermediate layer material (with a highly unusual structure, twisted EBMs with anisotropic molecular arrangements) that significantly improves the brightness, efficiency and lifetime of blue phosphorescence OLED devices.

The researcher report that the new materials enable to reduce the operating voltage of the OLED display, thus enhancing the power efficiency by 24% and the operational stability by 21%. The researchers say that this new material can also be used for in-organic LEDs (including microLEDs).

Read the full story Posted: Oct 02,2024

Lordin reports on a highly efficient and stable ultra-pure blue phosphorescent OLED emitter

Researchers from LORDIN, in collaboratioon with researchers from Korea's Dankook University, Gachon University and Hongik University, have reported on a highly efficient and stable ultra-pure blue phosphorescent OLED emitter, based on Lordin's Tetradentate Pt(II) material Complex with a vibration suppression effect.

The researchers say that the new emitter offers a lifetime of 451 hours (LT50 at 1,000 cd/m2), and an EQE of 25.1%. The emission spectrum is extremely narrow - full width at half a maximum of 22 nm. The researchers further developed a tandem OLED device based on this new emitter, which achieves an EQE of 50.3% and a lifetime of 589 hours (LT 70).

Read the full story Posted: Sep 19,2024

BOE shows a TADF-sensitized Tandem AMOLED device prototype

During the company's Innovation Partner Conference, BOE demonstrated a new 6.55" OLED panel prototype that utilizes TADF-sensitized materials and a tandem stack architecture. The company says that the TADF materials offer significantly improved color gamut, and it achieve 95% BT.2020 coverage, this in addition to the high power efficiency and long lifetime. 

It is our understanding that BOE's TADF-Sensitized material platform combines a deep green Hyperfluorescence emitter and a standard deep-red phosphorescence material. The blue emitter is likely a standard fluorescence bluet emitter.

Read the full story Posted: Sep 05,2024

Samsung Display plans to adopt new technologies with an aim to cut the power consumption of OLEDs by over 50%

During iMID 2024, Samsung Display's eVP Yi Chung said that the company plans to reduce the power consumption of its OLED panels by over 50%. SDC is developing several technologies, each contributing to the same efficiency goal.

SDC did not detail its plans exactly, but it did mention some of the new technologies it is working on - polarizer-free OLEDs (these have been commercialized already), multi-frequency driving (demonstrated by other OLED makers), tandem OLED architecture and the adoption of high efficiency blue PHOLED emitters.

Read the full story Posted: Aug 26,2024

LG Display to soon commercialize a tandem architecture blue phosphorescence OLED display

A report from Korea says that LG Display has successfully developed an OLED panel that is based on a blue phosphorescence emitter. The blue PHOLED, provided by Universal Display, offers 100% IQE, up from 25% used by current fluorescence emitters. This will result in around 20-30% power saving for the display itself (depending on the images shown).

A 13-inch tandem laptop OLED panel, LG Display

UDC has been developing blue emitters for many years, and recently the company said that the development will take a few more months and won't be ready in 2024. The main challenge is increasing the lifetime of the materials. However LG Display has adopted a tandem design to enable a commercially ready display, perhaps even sooner than UDC planned.

Read the full story Posted: Aug 22,2024 - 1 comment

Samsung Display: we develop blue OLED emitter technologies, both PHOLED and TADF based

Samsung Display's Lee Chang-hee, VP and head of SDC's research center, gave a talk during K-Display 2024, and updated that Samsung is progressing towards a next-generation blue OLED emitter technology in two tracks.

SDC is working with Universal Display, to adopt the company's blue PHOLED system. This is progressing, but SDC says that the pace is slow - indeed we heard from UDC lately that the introduction of a commercial material will take longer than expected.

Read the full story Posted: Aug 15,2024 - 1 comment

LG Display developed new tandem OLED technology to increase brightness and efficiency by 20%

According to a new report by Business Korea, LG Display is finalizing the development of its 3rd-gen tandem-stack automotive OLED technology, and aims to start mass producing these panels by 2026. LGD believes the new panels will improve the brightness and efficiency of its OLEDs by 20% (compared to its current 2nd-gen tandem OLEDs).

LG Display automotive OLED camp, 2023 iMID

LG Display believes it is leading the industry with its tandem OLED technology (and we tend to agree) and it hopes to accelerate its technology development to widen its lead. LG Display is enjoying a lead in the automotive display market with its OLED solutions and has already achieved design wins with many companies, including Genesis, Mercedes-Benz, Cadillac and GM.

Read the full story Posted: Jul 19,2024 - 4 comments

Next-generation OLED technologies that will enable brighter and more efficient displays

OLED displays have been gaining popularity rapidly, and are already the dominant smartphone display technology. OLEDs are also the display technology of choice in the smartwatch market, making inroads into the TV, monitor, laptop and tablet markets. The future of the OLED industry looks bright.

In recent years, the focus of the industry, beyond increasing capacity and reducing production costs, has been improving the performance of OLEDs in the areas of display brightness, efficiency, and lifetime. Brightness is required in many applications - from TVs (for HDR and to view in ambient lighting) through smartphones (outdoor viewing) to automotive, and efficiency is a plus in any scenario (but mostly in mobile displays). Display lifetime is already good enough for many applications, but in some cases (like automotive, and IT displays) it is critical. These three properties usually go together - if you can make more efficient OLED displays, you can drive them at a lower current to achieve the same brightness, and so lifetime increases, or you can achieve higher brightness, etc. 

Read the full story Posted: Jul 10,2024

Researchers find a new organic molecule with extremely fast phosphorescence, possibly enabling high efficiency OLED emission

Researchers from Osaka University have found that thienyl diketone, a new organic molecule, shows high-efficiency phosphorescence, and one that is more than ten times faster than traditional organic phosphorescence materials. Such a material could hold promise for highly-efficient phosphorescence emission without the use of heavy metals. 

The researchers explain that phosphorescence occurs when a molecule transitions from a high-energy state to a low-energy state, and it often competes with non-radiative processes (i.e. heat generation instead of light). This competition with the non-radiative process leads to slow phosphorescence and lower efficiency. This is solved by adding heavy metal into the emitter - but this new breakthrough achieves fast emission without the heavy metal.

Read the full story Posted: Jul 06,2024

ETNews: Samsung Display to supply its latest M14 AMOLED panels to Apple and Google

ETNews reports that Samsung Display has developed a new OLED stack, the M14 stack, that it will sell to both Apple and Google to be used in their latest smartphones. The new stack improve the efficiency, lifetime and brightness of the display compared to SDC's previous generation stack. 

According to ETNews, the new M14 stack will be used int he upcoming iPhone 16 Pro and Pro Max. Apple's regular iPhone 16 models will use the previous AMOLED stack, Samsung's M12. Google will also adopt the M14 stack in its Pixel 9 (all 3 model types) and the upcoming Pixel Fold 2.

Read the full story Posted: Jul 03,2024