US Patent:
20150162552, Jun 11, 2015
Inventors:
Jian Li - Tempe AZ, US
Guijie Li - Tempe AZ, US
International Classification:
H01L 51/00
H01L 51/50
Abstract:
Stable and efficient organic light-emitting diodes were prepared using tetradentate platinum-based blue and red emitters. In one example, a series of stable and efficient red phosphorescent OLEDs was fabricated employing a phenyl-pyridyl-carbazole based tetradentate cyclometalated Pt(II) complex as an emitting dopant and utilizing a commercially available host, transporting, and blocking materials. By implementing this platinum complex in electrochemically stable device architectures, long operational lifetimes were achieved with an estimated LTof over 600 hrs at luminance of 1000 cd/m.