Post-annealing effect on the interface morphology and current efficiency of organic light-emitting diodes

2013 ◽  
Vol 79 ◽  
pp. 45-49 ◽  
Author(s):  
Youngwoon Yoon ◽  
Hanju Lee ◽  
Taedong Kim ◽  
Kyoungchul Kim ◽  
Sula Choi ◽  
...  
Keyword(s):  
Current Efficiency ◽  
Light Emitting Diodes ◽  
Annealing Effect ◽  
Organic Light Emitting Diodes ◽  
Interface Morphology ◽  
Light Emitting ◽  
Post Annealing ◽  
Organic Light

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.

Four highly efficient cuprous complexes and their applications in solution-processed organic light-emitting diodes

RSC Advances ◽  
2015 ◽  
Vol 5 (43) ◽  
pp. 34424-34431 ◽  
Author(s):  
Qing Zhang ◽  
Xu-Lin Chen ◽  
Jun Chen ◽  
Xiao-Yuan Wu ◽  
Rongmin Yu ◽  
...  
Keyword(s):  
Current Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Solution Processed ◽  
Peak Current ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light

Four novel highly emissive cuprous complexes were prepared. The OLEDs from these complexes had a peak current efficiency of 17.8 cd A−1 and an EQE of 6.4%.

Enhanced Current Efficiency from Bio-Organic Light-Emitting Diodes Using Decorated Amyloid Fibrils with Conjugated Polymer

Nano Letters ◽  
2008 ◽  
Vol 8 (9) ◽  
pp. 2858-2861 ◽  
Author(s):  
Hideyuki Tanaka ◽  
Anna Herland ◽  
Lars J. Lindgren ◽  
Tetsuo Tsutsui ◽  
Mats R. Andersson
Keyword(s):  
Current Efficiency ◽  
Conjugated Polymer ◽  
Amyloid Fibrils ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light

scholarly journals Effects of the Thickness of N,N'-diphenyl-N,N'-di(m-tolyl)-benzidine on the Electro-Optical Characteristics of Organic Light-Emitting Diodes

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 966
Author(s):  
Sang-Geon Park ◽  
Won Jae Lee ◽  
Min Jong Song ◽  
Johngeon Shin ◽  
Tae Wan Kim
Keyword(s):  
Current Efficiency ◽  
Current Density ◽  
Light Emitting Diodes ◽  
Light Emitting Diode ◽  
Hole Transport ◽  
Organic Light Emitting Diodes ◽  
Optical Characteristics ◽  
Driving Voltage ◽  
Light Emitting ◽  
Organic Light

We examined the electro-optical characteristics of organic light emitting diodes according to the N,N'-diphenyl-N,N'-di(m-tolyl)-benzidine (TPD) thicknesses. The thicknesses of TPD were varied from 5 nm to 50 nm. The current density of the device with a TPD thickness of 5 nm was 8.94 times higher than that with a thickness of 50 nm at a driving voltage of 10 V. According to the conduction–current characteristics of conductors, the current densities improved with a decreasing TPD thickness. Different from the current density–voltage characteristics, the current efficiency–current density characteristics showed an improved efficiency with a 50 nm TPD thickness. The current efficiencies of a device with a 5 nm TPD thickness at a driving voltage of 10 V was 0.148 and at a 50 nm TPD thickness 0.993 cd/A, which was 6.7 times higher than the 5 nm TPD thickness. These results indicated that hole transport in Organic Light-Emitting Diode (OLED) devices were more efficient with thin 5 nm TPD than with thick 50 nm TPD, while electron transport was more efficient with thick 50 nm TPD, which caused conflicting results in the current efficiency-current density and current density-voltage characteristics according to TPD thicknesses.

Interface Morphology in Organic Light-Emitting Diodes

1999 ◽  
Vol 11 (2) ◽  
pp. 112-115 ◽  
Author(s):  
Sylvie Goncalves-Conto ◽  
Michel Carrard ◽  
Lynda Si-Ahmed ◽  
Libero Zuppiroli
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Interface Morphology ◽  
Light Emitting ◽  
Organic Light

scholarly journals Enhancement in current efficiency in organic light-emitting diodes with incorporation of subphthalocyanine

2009 ◽  
Vol 95 (13) ◽  
pp. 133302 ◽  
Author(s):  
Yu-Hung Chen ◽  
Jung-Hung Chang ◽  
Guan-Ru Lee ◽  
I-Wen Wu ◽  
Jheng-Hao Fang ◽  
...  
Keyword(s):  
Current Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light

A molecular dynamics study on the interface morphology of vapor-deposited amorphous organic thin films

2019 ◽  
Vol 21 (3) ◽  
pp. 1484-1490 ◽  
Author(s):  
Dongsun Yoo ◽  
Hochul Song ◽  
Yong Youn ◽  
Sang Ho Jeon ◽  
Youngmi Cho ◽  
...  
Keyword(s):  
Thin Films ◽  
Molecular Dynamics ◽  
Light Emitting Diodes ◽  
Organic Thin Films ◽  
Organic Light Emitting Diodes ◽  
Interface Morphology ◽  
Light Emitting ◽  
Organic Layers ◽  
Organic Light

The interfaces between amorphous organic layers play an important role in the efficiency and lifetime of organic light emitting diodes (OLEDs).

A new host material achieving above 75 cd A−1 current efficiency with top-emitting deep-red phosphorescent organic light-emitting diodes

2021 ◽  
Vol 9 (38) ◽  
pp. 13247-13254
Author(s):  
Qianqian Xu ◽  
Jiang Wu ◽  
Zuojia Li ◽  
Zhengkai Yin ◽  
Jie Li ◽  
...  
Keyword(s):  
Current Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Host Material ◽  
Practical Application ◽  
New Host ◽  
Light Emitting ◽  
Color Display ◽  
Full Color ◽  
Organic Light

Highly efficient deep-red phosphorescent OLEDs (PhOLEDs) are very important in the practical application of full-color display and automobile lighting.

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