OLED Lifetime: introduction and market status - Page 25

Idemitsu Kosan and Universal Display Corporation today announced that they have signed a non-exclusive collaboration agreement to accelerate the development of blue phosphorescent OLED materials. The collaboration will focus on blue phosphorescent OLED materials for use in displays fabricated through "dry" processing methods, such as vacuum thermal evaporation. The collaboration work will start between Universal Display and Idemitsu Kosan immediately after execution of their agreement.

To date, Idemitsu Kosan has been developing and commercializing mainly excellent fluorescent OLED materials (blue, green and red). Idemitsu Kosan is now supplying these materials to OLED display manufacturers throughout the world. Idemitsu Kosan is especially well-known for its blue fluorescent OLED material, which currently has the top market share in the world.

Universal Display is a leading developer of OLED technologies and materials, and holds basic patents on phosphorescent OLEDs. Many OLED display manufacturers are now evaluating Universal Display's PHOLED(TM) phosphorescent OLED technology and its red and green PHOLED materials, and Universal Display's red PHOLED material is currently being used in commercial production.

With Idemitsu Kosan's valuable experience and accomplishments in the development of blue fluorescent OLED materials, and Universal Display's leadership and pioneering efforts in phosphorescent OLED technology and materials, both companies are optimistic that they will be able to accelerate progress in the area of blue phosphorescent OLEDs through this collaboration.

Just two months after announcing a significant improvement in blue polymer lifetimes, Cambridge Display Technology (CDT) and Sumation announced another lifetime milestone for blue light emitting polymers.

Data from devices produced using these latest, solution processable, fluorescent materials show lifetime of 25,000 hours from an initial luminance of 400cd/m², equivalent to 400,000 hours from 100cd/m².

Following quickly behind the recent announcement of rapid progress in the development of longer lifetime blue light emitting polymers, comes this announcement of similarly impressive progress on red materials.

Data from devices produced using these latest, solution processable, phosphorescent materials show lifetime of 98,900 hours from an initial luminance of 400 cd/m², equivalent to over 1.5 million hours from 100 cd/m².

Universal Display Corporation today announced significant advances in the development of P(2)OLEDs printable, phosphorescent OLEDs as part of an ongoing joint development program with Seiko Epson Corporation. The demonstration of P(2)OLED materials that possess the high-efficiency of Universal Display's PHOLED phosphorescent technology, as well as ink-jet printing potential, is an important step toward the realization of cost-effective, large-area OLED displays. OLED displays are currently used in cell phones, MP3 players and PDAs, and are widely recognized as a strong candidate for use in the next generation of flat screen televisions.

After working together for less than two years, Universal Display is reporting key achievements in the development of a P(2)OLED system based on solution-processable, small-molecule PHOLED materials. These results include significant lifetime and efficiency advances for red and green color emitters.

Cambridge Display Technology and Sumation announce rapid progress in the development of longer lifetime blue light emitting polymers suitable for full color, video capable PLED displays.

The latest data show a lifetime of 20,000 hours from an initial luminance of 400 cd/m², equivalent to over 320,000 hours from 100 cd/m². This represents a three-fold improvement over the lifetime announced a year ago, and demonstrates the fruits of the collaboration by the development teams and the strong focus on this area. It is believed that there is great potential to make further dramatic improvements.

Philips and Novaled reached a new record for the power efficiency of a white OLED, obtaining 32 lm/W with colour coordinates of 0,47/0,45 and a CRI of 88 at a brightness of 1000 cd/m2. That same device structure thereby simultaneously shows a lifetime of more than 20000 hours which is a major achievement for a future commercialization of the OLED technology for lighting applications.

The efficiency of the device was measured using an integrating sphere using only the forward emission cone of the OLED device without attaching any lens or any other volume type luminaire to the OLED device. This is the only method to reliably predict power efficiency values for large area lighting tiles.

Universal Display will unveil a new deep red PHOLED material system with excellent luminous efficiency, 15 candelas per Ampere (cd/A), that corresponds to 19% external quantum efficiency.
In addition, the Company is reporting advancements in device architecture designs that lead to significantly extended lifetimes.

The Company is also demonstrating novel device architectures that provide significant enhancements in color saturation. By comparison to yellow-green color in a standard bottom-emitting OLED structure, the same PHOLED material system offers a saturated green color, with CIE coordinates of (0.25, 0.72), in a cavity-tuned, top-emission structure. (In a bottom-emitting structure, this system offers luminous efficiency of 71 cd/A and 100,000 hours of operating lifetime at 1,000 cd/m(2).)
As will be reported, Universal Display has developed device architectures to improve the luminous efficiency of its sky blue PHOLED material by 50%, to 30 cd/A, with 100,000 hours of operating lifetime at 200 cd/m(2).

Dr. Anna Chwang will present advances in the development of a top-emitting, active-matrix OLED display built on flexible metal foil using the Company's proprietary OLED technologies. The 100 ppi QVGA OLED display is integrated onto a poly-silicon TFT backplane developed by Palo Alto Research Center (PARC).

Ron Mertens from OLED-Info.com recently had the opportunity to interview Khaled R. Khuda, President, One Stop Displays.

One Stop Displays (OSD) of Winter Park, FL has over a 15 year history of experience for display technology. OSD is focused on advanced display technology and associated services. OSD features OLED, PLED, and TFT display technology. This short interview is a follow-up of our October 2004 interview.

Q: First of all, thank you for accepting to do this interview session with us. Our previous interview was at October 2004. Can you give us a quick overview of OSD today? What has changed since in the last year and a half?

Since the last interview there have been several advancements made in OSD's Organic display offerings. Both large molecule and small molecule organic displays have seen improvements in materials and reliability. Materials used in the small molecule OLEDs have increased the life expectancy by approximately 50% in some cases. For example the monochrome Orange displays have shown experimental lifetimes of up to 90k hours. Improvements in OLED color filter technology have allowed full color SMOLEDs to achieve brightness levels of up to 150 nits.