Pentacoordinate Al and Ga complexes of the type ML2OR, where L is a 2- methyl- 8- quinolinolate and OR is a monodentate, anionic O donor ligand, were optimized for robust use in vapor-deposited OLEDs. Photophysical, thermal, and crystallographic properties relevant to OLEDs are reported. The utility of the complexes is illustrated in new formulations for blue fluorescent and red phosphorescent OLEDs. (c) 2007 Elsevier B. V. All rights reserved.
This invention provides an organic EL material useful for the emissive layer of an organic EL element which deteriorates little in luminance when operated over a prolonged period of time and shows excellent durability. The material is an aluminum chelate complex which is represented by general formula (1) in which Ar
1
is a mono- or bicylic arylene group, Ar
2
is a mono- or bicyclic aryl group, R
1
-R
6
are hydrogen or hydrocarbon groups containing 1-8 carbon atoms and contains a compound represented by general formula (1) in which Ar
2
is a halogen as an impurity in an amount of 350 wt ppm or less.
作者:Joseph C. Deaton、David W. Place、Christopher T. Brown、Manju Rajeswaran、Marina E. Kondakova
DOI:10.1016/j.ica.2007.07.008
日期:2008.3
Pentacoordinate Al and Ga complexes of the type ML2OR, where L is a 2- methyl- 8- quinolinolate and OR is a monodentate, anionic O donor ligand, were optimized for robust use in vapor-deposited OLEDs. Photophysical, thermal, and crystallographic properties relevant to OLEDs are reported. The utility of the complexes is illustrated in new formulations for blue fluorescent and red phosphorescent OLEDs. (c) 2007 Elsevier B. V. All rights reserved.