Solution based OLEDs

Is current OLED architecture obsolete? An interview with the head of Germany's Max Planck Institute

Researchers from Germany's Max Planck Institute, led by Prof. Paul W.M. Blom, are looking into single-layer OLED devices (in which a single emitting layer is sandwiched between two electrodes), with an aim to match their efficiencies to those of common multilayer OLED stacks, like the ones used in commercial OLED displays.

Current OLED architectures utilize multilayer stacks of materials, in order to increase the performance and lifetime of OLED devices. But according to the latest findings by Prof. Blom, equal efficiencies can indeed be met with single-layer TADF OLED emitters - and there's no fundamental reason or major benefits that arise from multilayer OLEDs.

Read the full story Posted: Feb 02,2023

Samsung Display developed a 18.2" 350 nits ink-jet printed OLED panel

Samsung Display has developed a 18.2" 2560x1440 202 PPI inkjet-printed OLED display, that features the highest current efficiency of any inkjet-printed OLED, with the brightness at 350 cd/m2 (full white).

Samsung Display 18.2'' ink-jet printed OLED (SID DW 2020)

Samsung Display says that the high brightness was achieved by tuning the top-emission device structure with high performance soluble materials. The high pixel resolution was achieved by modulating the jetting waveform for ejecting ink drops and improving the drop placement accuracy by selecting the right ink formulations in terms of viscosities and surface energies.

Read the full story Posted: Aug 08,2020

Digitimes: AUO to build a 6-Gen OLED ink-jet printing line

Digitimes reports that AU Optronics has setup a 3.5-Gen test ink-jet OLED printing line, and the company now intends to start building a 6-Gen production line. AUO will start constructing the line before the end of 2019.

AUO's Chairman confirmed that the latest advances in printing materials and equipment are starting to make OLED printing viable for commercial use. AUO has not yet decided the schedule for volume production.

Read the full story Posted: May 02,2019

LG Chem acquires DuPont's soluble OLED IP and technologies

LG Chem has acquired DuPont's soluble OLED technologies and assets, in a deal estimated at $175 million. LG Chem will receive DuPont's entire soluble OLED IP (540 materials and process patents) and all of DuPont's related equipment and R&D facilities. The deal does not include any assets related to Dupont's evaporation OLED business.

LG Chem and DuPont soluble OLED technologies acquisition ceremony

LG Chem believes that the OLED industry is moving towards ink-jet printing of OLED panels based on soluble OLED materials and technologies - and it has now acquired key technologies in this area. DuPont has been developing related materials for over 20 years, has been collaborating with equipment makers (such as Kateeva) and display makers and has also developed its own nozzle-printing process.

Read the full story Posted: Apr 03,2019

UBI: 440 million AMOLEDs were shipped in 2017, the market will reach almost a billion units by 2022

UBI Research estimates that AMOLED shipments reached 440 million units in 2017 (up 13.6% from 2016), with revenues reaching $27.1 billion (up 62.3% from 2016). Only yesterday did DSCC release its own estimates of $23.2 billion in revenues for the AMOLED market in 2017.

AMOLED market forecast (2018 - 2022, UBI Research)

The AMOLED market is expected to grow at a CAGR of 17.5% to reach almost a billion units in 2022. Revenues will grow faster at 22% and reach $80.5 billion in 2022.

Read the full story Posted: Feb 15,2018

OLED Ink-jet printing market situation, early 2018

Many OLED producers believe that Ink-Jet printing of OLED emissive materials is the best way to achieve lower-cost OLED TV production, and to enable OLEDs to compete in the medium part of the TV market. Ink-Jet printing is an efficient process (less material waste compared to evaporation) and it can be very quick as well. The main drawbacks of inkjet are the limited resolution and the need for soluble emissive materials which are less efficient compared to evaporation ones.

A Kateeva OLED ink-jet printing system

These challenges are being overcome, and it seems that at least four groups (in Korea, Japan and China) are charging forward towards mass production of ink-jet printed OLEDs. Ink-jet printer makers and soluble material suppliers are also optimistic ink-jet printing commercialization will soon be here as the material performance gap is diminishing.

Read the full story Posted: Jan 17,2018

The EU LEO project developed efficient and cost-effective OLED lighting technologies

In 2015 the EU launched a 3-year €4 million OLED lighting project, the LEO project (Low-cost / energy Efficient OLEDs) that had an aim to develop efficient and cost-effective bendable OLED lighting technologies. The project consortium included Osram, and Cynora.

A month before the project officially ends, the partners updated on their progress. For this project, the partners develops several technologies, including low-cost metal foils integrating OLED anodes and possibly backside monitoring printed circuits, smart OLED top-electrode architectures and light out-coupling solutions and a novel thin film top-encapsulation strategies. These technologies together increased the light output by 50% while providing better surface scratch resistance.

Read the full story Posted: Dec 06,2017

The EU SOLEDLIGHT project developed solution-processed R2R OLEDs, reports interim results

The SOLEDLIGHT (Solution Processed OLEDs for Lighting) project was launched in 2015 by a European consortium with an aim to develop cost efficient, roll-to roll (R2R) solution processed OLEDs, including their integration in prototype multiple-panel OLED lighting systems and luminaires.

The SOLEDLIGHT consortium (which is coordinated by the University of Valencia and includes OSRAM and Solvay) reported that it managed to develop multi-layer R2R solution processed OLEDs that achieved a power efficiency of 20 lm/W. This is still not up to par with evaporation-based OLEDs, but the project partners aim to achieve 100 lm/W (and 15,000 hours) by the end of 2017.

Read the full story Posted: Nov 18,2017

DSCC: Ink-Jet printing could lead to 17% cost reduction in 55" OLED TV production

LG Display currently produces all its OLED TV panels using an evaporation (VTE) process. Market research company DSCC says that ink-jet printing is more efficient than current VTE processes as it will result in simpler displays (no need for color filters, for example, as used by LG's current WRGB displays). Ink-Jet printing will also enjoy lower depreciation costs and lower indirect expenses such as water and electricity.

55'' OLED TV cost evaporation vs Ink-Jet (DSCC, 2017)

DSCC estimates that an ink-jet printed 55" OLED TV panel will cost 17% less to produce compared to a VTE produced panel. An ink-jet printed panel will theoretically be significantly brighter (as the color filters absorb a large portion of the light), however solution-based OLED materials have traditionally lagged behind evaporation ones (Merck though says that the latest soluble materials are on-par with evaporation ones).

Read the full story Posted: Oct 27,2017