Power consumption - Page 14

Germany-based blue-TADF OLED emitter developer Cynora announced that it achieved a new performance record with its latest blue emitter material - which the company believes is the best overall performance of a high-efficiency blue emitter ever.

Cynora's new blue achieves a 15% EQE at 1000 cd/m² with an emission peak at 90 hours (at 700 cd/m²) on a device level. Cynora says that it is very confident that it can commercialize its first highly efficient blue emitter by the end of this year, as planned.

OLEDWorks introduced a new OLED lighting panel, the Brite Amber. This panel is free from any blue emission and OLEDWorks sees applications in the healthcare, senior living and residential markets. This upgrade to OLEDWorks' existing Amber panel features a higher brightness of 2,000 cd/m².

The Brite AMber features an efficiency of over 50 lm/W and the lifetime is over 25,000 (but OLEDWOrks does not mention at what brightness level). The panel is 41.5 x 101.6 mm in size (active area 88 x 25 mm).

OLEDWorks latest panel is the Brite 2 - announced in March 2016. The Brite 2 offers a brightness of 300 lumens, a high CRI (>90) and an efficiency of 60 lm/W. According to the company's roadmap, OLEDWorks aims to release 80-100 lm/W flexible panels by next year.

By 2020, OLEDWorks' panels will have an efficiency of over 100 lm/W and a lifetime of over 50,000 hours (LT70).

The EU launched a new project called HyperOLED with an aim to develop materials and matching device architectures for high-performance, hyperfluorescence TADF OLED emitters. HyperOLED is coordinated by Merck, and the project partners include MicroOLED and the Fraunhofer IOF institute. This three years project received a €4 million grant from the EU.

These OLED emitters will be realized by combining TADF molecular hosts with novel shielded fluorescence emitters, targeting saturated blue emission of very high efficiency at high brightness. The project will also achieve efficiency gains through molecular alignment to enhance light outcoupling.

TADF are getting a lot of attention now, as a promising new emitter type that could finally enable efficient blue emission, and also efficient alternative to red and green phosphorescent emitters.

Several new TADF research papers have been announced by SID and will be presented at DisplayWeek 2017. Below you will find a list of these recent achievements, at no particular order.

First-O-Lite (FOL) was established in 2010 in Nanjing, China with an aim to become an OLED lighting developer and producer. Based on its hybrid tandem architecture, FOL has a 2-Gen OLED lighting production fab that is currently producing 70 lm/W OLED lighting panels.

This article details the company's OLED lighting panels, its strategy to create an initial health-lighting niche market in china, its current product families and its technology and business roadmaps going forward.

According to the Korea Herald, Samsung Electronics demonstrated several new display technologies in a private room during the Mobile World Congress last month. All of these technologies are expected to enter production within the next year or two, according to the source quoted by the report.

1,200 PPI AMOLED for VR

The report claims that Samsung demonstrated a high-resolution AMOLED panel for VR applications. The AMOLED on display featured a 1,200 PPI - much higher than Samsung's current highest density displays which are 577 PPI. Samsung's aim is to reach 1,500 PPI which will greatly enhance the VR experience.

In November 2016 Sunic Systems announced that it developed an plane-source evaporation-FMM based AMOLED production process that can reach very high densities. The 100um mask announced in November can achieve a PPI of 1,500. This may be the system that Samsung is now testing. Sunic says that eventually this technology will enable even 2,250 PPI.

Researchers from Osaka University managed to create multi-color Mechanochromic Luminescent (MCL) materials. The materials were found to exhibit efficient TADF emission, and the researchers developed an efficient OLED device based on these new materials.

MCL materials change their color in response to a change in their environment - for example pressure or temperature. Most MCL materials can only change between two colors, but the new materials can switch between yellow, red and orange. The color shift occurs in response to heating, fuming, and grinding.

BASF announced that it acquired light management expert Rolic AG, a private company headquartered in Switzerland. The financial details of the transaction were not disclosed.

Rolic develops and markets nanoscale surface modification systems that achieve unique light management and optical effects. Rolic has three business units: displays, security and organic electronics. For the OLED market, Rolic develops materials that improve light outcoupling, lifetime and efficiency for OLED displays and lighting panels.

Researchers from South China University of Technology developed a new OLED structure that promises to enable low-cost efficient fluorescent OLED devices. The so-called pn-OLED structure is inspired by p-n junction theory and inorganic LED design.

The pn-OLED uses a highly-efficient emission-layer-free OLED, in which the p-type and n-type organic semiconductors are sandwiched vertically between an ITO anode and a lithium fluoride/aluminum cathode. The luminescent center of the pn-OLED is located in the pn junction region. The light-emission behavior of this device is a result of the synergetic energy release from both the p-type and n-type materials. This is in contrast to conventional OLEDs, where the light generation occurs from single-molecule emitters.