Fluorescent

Researchers develop a blue fluorescent OLED device with ultra-low turn-on voltage

Researchers from the Tokyo Institute of Technology, Osaka University, University of Toyama and Shizuoka University have developed a fluorescent blue (462 nm) OLED device that features an ulta-low turn-on voltage of 1.47 V (at 100 nits). The researchers say this is very low, as similar commercial blue devices typically need around 4 V.

To achieve that low turn-on voltage, the researchers built a new device, as they realize that the choice of materials significantly influences the device's turn-on voltage. The device itself is an upconversion OLED.

Read the full story Posted: Sep 22,2023

Researchers develop promising near-UV CMAc OLED emitters

Researchers from the University of Manchester, led by Prof. Alexander Romanov, developed a promising new Carbene-Gold-Arylacetylide (CMAc) OLED near UV emitter type. The researchers also detail a strategy to develop longer device lifetimes for such emitters.

The new emitter exhibits an efficiency of 1% EQE, and a lifetime of 20 minutes at a practical brightness of 10 nits (LT50). This is low compared to commercial OLEDs - but it is actually quite outstanding for such an emitter, and the researchers say that this is among the longest lifetimes for a near UV-OLED at a practical brightness ever reported. In addition, organic fluorescent and TADF emitters rarely exceed 1% EQE at practical brightness.

Read the full story Posted: Sep 06,2023

Nanomatch announces a novel class of emitters for efficient and stable blue OLEDs

This is a sponsored post by Nanomatch

Using their in-house virtual design tools, Nanomatch developed a new class of emitters that enables the production of stable, fluorescent OLED devices with close to 100% internal quantum efficiency also in the blue color range.

The specific class of fluorescent emitters facilitates the generation of only singlets with radiative decay of the order of 10-8s, thereby eliminating quenching processes induced by long-lived triplets. Having filed the patent end of February 2023, Nanomatch is now looking for partners to commercialize this new concept in order to realize efficient, stable blue OLEDs on an industrial level.

Read the full story Posted: Mar 28,2023

Kyushu University researchers developed a promising new two-unit stacked tandem Hyperfluorescence blue OLED emitter system

Researchers from Kyushu University reported that they have developed a promising new blue OLED emitter system, based on a two-unit stacked tandem hyperfluorescence OLED with improved singlet-excited-state energy transfer from a sky-blue assistant hetero-donor-type TADF (HDT-1) dopant.

Two-unit stacked tandem Hyperfluorescence blue OLED device (Kyushu University)

The research reports that the new emitter system offers a pure-blue color (CIE 0.13, 0.16), a narrow spectrum (full-width at half-maximum of 19 nm), an EQE of 32% at 1,000 cd/m2 and a lifetime of 18 hours LT95. The lifetime is still lacking, but with stricter control of device fabrication and procedures the researchers say they expect that device lifetimes will further improve to rival commercial fluorescent blue OLEDs.

 
Read the full story Posted: Jan 05,2021

Kyulux updates on its latest Hyperfluorescence TADF emitter performance

Kyulux presented a new paper at SID Displayweek, that shows the latest progress of the company's Hyperfluorescence OLED emitter platform. You can see the latest performance chart below.

Kyulux TADF HF material specifications, August 2020

Hyperfluorescence combines TADF and fluorescence emitters, which enables high-efficiency (~100% IQE) emitters that feature long lifetimes and a very narrow emission spectrum. The company's yellow HF emitter is already commercialized, and now Kyulux says that its red and green materials are "close to commercialization". The company is also improving the color point and lifetime of its HF blue emitters.

Read the full story Posted: Aug 05,2020

Amber Molecular raises $5 million to advance its fluorescent OLED R&D

Amber Molecular announced that it has completed its Series A funding round, raising $5 million USD, led by Phoenix Venture Partners.

Amber Molecular was established in 2017 by researchers at The University of Toronto in Canada to develop novel fluorescent OLED emitters. Amber Molecular's patented family of fluorescent OLED emissive materials produce photons in the orange, red and infrared spectrum, targeting new OLED applications.

Read the full story Posted: Jun 24,2020

A Q&A with Dr. York Tsai, Wisechip's Vice President of R&D

WiseChip Semiconductor, based in Taiwan, is one of the world's leading PMOLED maker (in fact in 2015 Wisechip said it's the world's second largest). Wisechip is developing next-generation PMOLED displays, including flexible panels, transparent panels and Hyperfluorescence/TADF PMOLEDs.

Wisechip headquarters photo

WiseChip recently announced its first, and the world’s first, Hyperfluorescence display, using TADF materials provided by Kyulux. Can you tell some more about this display and its properties?

This 2.70 128x64 product is adopted mostly in industrial products. The size matters in such market but the main problem was to increase the brightness due to the limited efficiency of the fluorescence emitters. The Hyperfluorescence technology helps to settle the problem and can reach up 2.5 times brighter. It performs much better readability so users do not have to stand right in front of the device. This feature adds to the value of the end product.

Read the full story Posted: May 14,2020

A Q&A with Cynora's CEO, to discuss the company's new blue emitter

OLED material developer Cynora recently announced its first commercial product, the cyBlueBooster fluorescent blue emitter that is 15% more efficient that current fluorescent blue emitters on the market.

Cynora cyBlueBooster OLED closeup photo

This was a very interesting announcement, and Cynora's CEO Adam Kablanian was kind enough to answer a few questions we had to help understand the new material and Cynora's current business and latest technology.

Read the full story Posted: Mar 05,2020

Cynora announces a new blue fluorescent emitter that is 15% more efficient than current emitters

OLED material developer Cynora announced its first commercial product, a fluorescent blue emitter that is based on an "advanced molecular design" that is 15% more efficient that current fluorescent blue emitters on the market. Cynora brands its new material as cyBlueBooster, and it says it is currently available for commercialization in several shades of blue.

Cynora cyBlueBooster OLED devices photo

This could be very exciting news - while the whole industry is looking for next-generation emitters using TADF or PHOLED technologies, Cynora could have found an easier path to reduce power consumption by 15%. OF course a TADF or PHOLED emitter will achieve a reduction of 75% in power consumption compared to currently-used fluorescent emitters.

Read the full story Posted: Mar 03,2020

Idemitsu Kosan and Toray developed a red TADF/HF device that is the world's most efficient OLED emitter

Idemitsu Kosan and Toray Industries announced that the companies have jointly developed a red OLED device that is the world's most efficient emitter at 46 cd/A. The device uses a TADF emitter combined with red fluorescent materials (which likely means this is a HyperFluorescence device).

Idemitsu and Toray has been collaborating on OLED material development since 2017. This new device uses Idemitsu's TADF material combined with Toray's new red fluorescent material. The two companies say that this new material provides the same results as currently used red phosphorescent devices, and the plan is now to "drive forward to secure adoption of their materials" in mobile and TV applications.

Read the full story Posted: Dec 02,2019