Organic light-emitting diodes under high currents explored by transient electroluminescence on the nanosecond scale

2011 ◽  
Vol 84 (11) ◽  
Author(s):  
D. Kasemann ◽  
R. Brückner ◽  
H. Fröb ◽  
K. Leo
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Transient Electroluminescence

Kinetics of transient electroluminescence in organic light emitting diodes

2008 ◽  
Vol 41 (16) ◽  
pp. 165101 ◽  
Author(s):  
Manju Shukla ◽  
Pankaj Kumar ◽  
Suresh Chand ◽  
Nameeta Brahme ◽  
R S Kher ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Transient Electroluminescence ◽  
Kinetics Of

Overshoot effect in transient electroluminescence from single layer organic light-emitting diodes

2001 ◽  
Vol 90 (11) ◽  
pp. 5554-5560 ◽  
Author(s):  
J. Pommerehne ◽  
D. V. Nikolaenkov ◽  
V. R. Nikitenko ◽  
H. Bässler
Keyword(s):  
Light Emitting Diodes ◽  
Single Layer ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Transient Electroluminescence

Current Density Dependence of Transient Electroluminescence in Phosphorescent Organic Light-Emitting Diodes

2011 ◽  
Vol 1286 ◽  
Author(s):  
Hirotake Kajii ◽  
Noriyoshi Takahota ◽  
Yadong Wang ◽  
Yutaka Ohmori
Keyword(s):  
Current Density ◽  
Light Emitting Diodes ◽  
High Current Density ◽  
Organic Light Emitting Diodes ◽  
Recombination Lifetime ◽  
Light Emitting ◽  
Organic Light ◽  
Decay Times ◽  
Transient Electroluminescence ◽  
Triplet Triplet Annihilation

ABSTRACTThe transient electroluminescence (EL) of phosphorescent organic light-emitting diodes (OLEDs) was investigated. The behaviors of the transient characteristics are analyzed using the triplet-triplet annihilation model. The device exhibited a gradual decrease in quantum current efficiency owing to the triplet-triplet annihilation at a high current density. At a higher current density, the reduced rise and decay times are due to high-density triplet excitons related to the enhanced triplet-triplet annihilation and the increase of the nonradiative process. The modulation speed of the devices is mainly limited by the phosphorescent recombination lifetime.

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