Chou, Ho-Hsiu published the artcileNew Iridium Dopants for White Phosphorescent Devices: Enhancement of Efficiency and Color Stability by an Energy-Harvesting Layer, Quality Control of 219508-27-7, the publication is ACS Applied Materials & Interfaces (2013), 5(13), 6168-6175, database is CAplus and MEDLINE.
A new light blue complex (fmoppy)2Ir(tfpypz) [bis(4′-fluoro-6′-methoxylphenylpyridinato)[3-(trifluoromethyl)-5-(pyridin-2-yl)-1,2,4-triazolato]iridium] and a new orange complex (dpiq)2Ir(acac) [acetylacetonatobis(3,4-diphenylisoquinoline)iridium] were synthesized. These 2 complexes were used as the dopants for the fabrication of 2-element white phosphorescent devices. Via the introduction of a thin energy-harvesting layer (EHL) to harvest the extra energy and exciton from the emission zone, highly efficient 2-element white devices with excellent color stability were created. One of the best devices shows yellow-white color emission with an extremely high external quantum efficiency (EQE) of 21.5% and a current efficiency of 68.8 cd/A. The other device gave a pure white emission with an external quantum efficiency of 19.2% and a current efficiency of 53.2 cd/A. At a high brightness of 1000 cd/m2, the EQE still remains ≤18.9 and 17.2%. With a brightness of 1000-10000 cd/m2, the CIE coordinates of these 2 devices shift by only (0.02, ≤0.01). The white phosphorescent devices with the EHL showed much higher efficiency and better color stability than the 1 without the EHL. Crystallog. data are given.
ACS Applied Materials & Interfaces published new progress about 219508-27-7. 219508-27-7 belongs to triazoles, auxiliary class Trifluoromethylated Building Blocks, name is 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, and the molecular formula is C8H5F3N4, Quality Control of 219508-27-7.
Referemce:
https://en.wikipedia.org/wiki/1,2,3-Triazole,
Triazoles – an overview | ScienceDirect Topics