scholarly journals Low roll-off of efficiency at high current density in phosphorescent organic light emitting diodes

2007 ◽  
Vol 90 (22) ◽  
pp. 223508 ◽  
Author(s):  
Jae-Wook Kang ◽  
Se-Hyung Lee ◽  
Hyung-Dol Park ◽  
Won-Ik Jeong ◽  
Kyung-Mo Yoo ◽  
...  
Keyword(s):  
Current Density ◽  
Light Emitting Diodes ◽  
High Current Density ◽  
Organic Light Emitting Diodes ◽  
High Current ◽  
Light Emitting ◽  
Organic Light

Injection and Transport of High Current Density over 1000 A/cm2in Organic Light Emitting Diodes under Pulse Excitation

2005 ◽  
Vol 44 (6A) ◽  
pp. 3659-3662 ◽  
Author(s):  
Hajime Nakanotani ◽  
Takahito Oyamada ◽  
Yuichiro Kawamura ◽  
Hiroyuki Sasabe ◽  
Chihaya Adachi
Keyword(s):  
Current Density ◽  
Light Emitting Diodes ◽  
High Current Density ◽  
Organic Light Emitting Diodes ◽  
Pulse Excitation ◽  
High Current ◽  
Light Emitting ◽  
Organic Light

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.

Highly efficient bluish green organic light-emitting diodes of iridium(iii) complexes with low efficiency roll-off

2018 ◽  
Vol 47 (22) ◽  
pp. 7587-7593 ◽  
Author(s):  
Ning Su ◽  
Zheng-Guang Wu ◽  
You-Xuan Zheng
Keyword(s):  
Current Efficiency ◽  
External Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
High Current ◽  
High Current Efficiency ◽  
Light Emitting ◽  
Organic Light ◽  
Bluish Green ◽  
Low Efficiency

Two efficient bluish green iridium(iii) complexes were applied as emitters in the organic light-emitting diodes, which showing high current efficiency of 58.17 cd A−1 and external quantum efficiency of 25.33% with low efficiency roll-off.

High efficiency Green Organic Light-emitting Diode Without Roll-off Under High Current Density

2015 ◽  
Vol 36 (11) ◽  
pp. 1307-1310
Author(s):  
田苗苗 TIAN Miao-miao ◽  
贺小光 HE Xiao-guang ◽  
祁金刚 QI Jin-gang ◽  
王 宁 Wang Ning
Keyword(s):  
Current Density ◽  
High Efficiency ◽  
High Current Density ◽  
Light Emitting Diode ◽  
High Current ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light

Charge transport in polymer light-emitting diodes at high current density

1999 ◽  
Vol 75 (6) ◽  
pp. 841-843 ◽  
Author(s):  
I. H. Campbell ◽  
D. L. Smith ◽  
C. J. Neef ◽  
J. P. Ferraris
Keyword(s):  
Charge Transport ◽  
Current Density ◽  
Light Emitting Diodes ◽  
High Current Density ◽  
High Current ◽  
Light Emitting ◽  
Polymer Light Emitting Diodes
Sign in / Sign up

Export Citation Format

Share Document