Color Stability of Blue Phosphorescent Organic Light-Emitting Diodes with Undoped Layer in Emissive Layer

2012 ◽  
Vol 51 (9S2) ◽  
pp. 09MH02
Author(s):  
Chan-Jae Lee ◽  
Chang-Jun Maeng ◽  
Jin-Ho Ahn ◽  
Jeong-No Lee ◽  
Min-Gi Kwak
Keyword(s):  
Light Emitting Diodes ◽  
Color Stability ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Emissive Layer ◽  
Organic Light ◽  
Blue Phosphorescent

White phosphorescent organic light-emitting diodes using double emissive layer with three dopants for color stability

2014 ◽  
Vol 12 (10) ◽  
pp. 102302-102305 ◽  
Author(s):  
Jin Wook Kim Jin Wook Kim ◽  
Nam Ho Kim Nam Ho Kim ◽  
Ju-AnYoon Ju-AnYoon ◽  
Seung Il Yoo Seung Il Yoo ◽  
Jin Sung Kang Jin Sung Kang ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Color Stability ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Emissive Layer ◽  
Organic Light

Homoleptic Cyclometalated Dibenzothiophene-NHC-Iridium(III) Complexes for Efficient Blue Phosphorescent Organic Light-Emitting Diodes

2021 ◽  
Author(s):  
Bo-Sun Yun ◽  
So-Yoen Kim ◽  
Jin-Hyoung Kim ◽  
Ho-Jin Son ◽  
Sang Ook Kang
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Emission Efficiency ◽  
Deep Blue ◽  
Organic Light ◽  
Blue Phosphorescent

The NHC-Ir complexes f-IrSiPr, m-IrSiPr, and m-IrSMe, in which a dibenzothiophene (DBT) moiety is used to increase the emission efficiency for deep-blue phosphorescence, were synthesized and compared with the dibenzofuran...

scholarly journals Solution-Processed Efficient Blue Phosphorescent Organic Light-Emitting Diodes (PHOLEDs) Enabled by Hole-Transport Material Incorporated Single Emission Layer

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 554
Author(s):  
Taeshik Earmme
Keyword(s):  
Light Emitting Diodes ◽  
Blue Emission ◽  
Hole Transport ◽  
Organic Light Emitting Diodes ◽  
Emission Layer ◽  
Solution Processed ◽  
Light Emitting ◽  
Organic Light ◽  
Single Emission ◽  
Blue Phosphorescent

Solution-processed blue phosphorescent organic light-emitting diodes (PHOLEDs) based on a single emission layer with small-molecule hole-transport materials (HTMs) are demonstrated. Various HTMs have been readily incorporated by solution-processing to enhance hole-transport properties of the polymer-based emission layer. Poly(N-vinylcarbazole) (PVK)-based blue emission layer with iridium(III) bis(4,6-(di-fluorophenyl)pyridinato-N,C2′)picolinate (FIrpic) triplet emitter blended with solution-processed 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC) gave luminous efficiency of 21.1 cd/A at a brightness of 6220 cd/m2 with an external quantum efficiency (EQE) of 10.6%. Blue PHOLEDs with solution-incorporated HTMs turned out to be 50% more efficient compared to the reference device without HTMs. The high hole mobility, high triplet energy of HTM, and favorable energy transfer between HTM blended PVK host and FIrpic blue dopant were found to be important factors for achieving high device performance. The results are instructive to design and/or select proper hole-transport materials in solution-processed single emission layer.

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