Portal de Periódicos da CAPES

High T/sub g/ hole transport polymers for the fabrication of bright and efficient organic light-emitting devices with an air-stable cathode

2000; IEEE Photonics Society; Volume: 36; Issue: 1 Linguagem: Inglês

10.1109/3.817633

1558-1713

Ghassan E. Jabbour, Sean E. Shaheen, M. M. Morrell, Jeff D. Anderson, P. Lee, S. Thayumanavan, Stephen Barlow, Erika Bellmann, Robert H. Grubbs, Bernard Kippelen, Seth R. Marder, Neal R. Armstrong, N. Peyghambarian,

Molecular Junctions and Nanostructures

An organic electroluminescent device with a luminous efficiency of 20 Im/W, at 14 cd/m/sup 2/, and an external quantum efficiency of 4.6% has been fabricated using a high T/sub g/ hole transport polymer, a small molecule emission layer, and a LiF/Al cathode. The device quantum efficiency can be increased by tuning the ionization potential of the hole-transport moieties. When tested under pulsed voltage mode, in air at room temperature, and without any encapsulation, the device showed a high peak brightness of 4.4/spl times/10/sup 6/ cd/m/sup 2/ at 100 A/cm/sup 2/ and an efficiency of 4.4 cd/A.