Title :
High T/sub g/ hole transport polymers for the fabrication of bright and efficient organic light-emitting devices with an air-stable cathode
Author :
Jabbour, G.E. ; Shaheen, S.E. ; Morrell, M.M. ; Anderson, J.D. ; Lee, P. ; Thayumanavan, S. ; Barlow, S. ; Bellmann, E. ; Grubbs, R.H. ; Kippelen, B. ; Marder, S. ; Armstrong, N.R. ; Peyghambarian, N.
Author_Institution :
Opt. Sci. Center, Arizona Univ., Tucson, AZ, USA
Abstract :
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.
Keywords :
brightness; cathodes; conducting polymers; electroluminescent devices; glass transition; hole mobility; light emitting diodes; optical polymers; organic semiconductors; 4.6 percent; LiF-Al; LiF/Al cathode; air-stable cathode; bright efficient organic light-emitting devices; efficiency; external quantum efficiency; fabrication; high T/sub g/ hole transport polymers; high peak brightness; hole-transport moieties; ionization potential tuning; luminous efficiency; organic electroluminescent device; pulsed voltage mode; room temperature; small molecule emission layer; Brightness; Cathodes; Chemical technology; Fabrication; Indium tin oxide; Ionization; Nonhomogeneous media; Organic light emitting diodes; Polymers; Voltage;
Journal_Title :
Quantum Electronics, IEEE Journal of
