Merck KGaA of Darmstadt, Germany, announced
today that it is launching several new OLED materials, including a blue singlet emitter
(SEB series) that features ultra deep blue color coordinates. Measured in solvent, this
dopant shows a color as deep as CIE(x;y) 0.15/ 0.09 with a full width half maximum
(FWHM) of only 54 nm. The announcement was made at the 46th Annual Society for
Information Display (SID) International Symposium, Seminar and Exhibition taking
place in Los Angeles, California.
Merck, the world’s leading supplier of liquid crystals for the display industry, said that in
a bottom emission OLED device, an external quantum efficiency (EQE) in excess of
5.6% and color coordinates of 0.15/ 0.10 can be achieved with this new material. The
stable material performance at high driving current and high temperatures makes the
material ideal for passive matrix based automotive and mobile display applications. In
active matrix top emission devices, the material allows panel-makers to achieve a high
NTSC color gamut while drastically reducing power consumption and increasing
product lifetime.
Merck also has developed a new light blue dopant for two color white or monochrome
OLED applications. At CIE(x;y) 0.14/0.27, this material shows outstanding efficiency
(7% EQE and 12.5 cd/A @ 1000cd/m²) and excellent lifetime above 36000h at
1000cd/m² for a basic bottom emission device structure.

For the singlet green host (SMG series) and dopant package (SEG series) from Merck,
a lifetime of >> 250000 h at 1000 cd/m² has been reported with a very high efficiency of
> 7% EQE.
Merck's new Electron Transport Materials (ETM series) and host (matrix) materials
significantly lower the driving voltage and improve the efficiency of an OLED stack.
On the soluble side, new >10lm/W white materials have been developed at R&D scale.
This class of materials can be processed from solution in an easy, two-layer device
architecture. The white polymers can be tuned from warm to cold white for a wide
range of possible applications.
Merck will be demonstrating these unique materials for the first time to the public at
Booth 149 at the SID 2008 in Los Angeles.