scholarly journals Organic Light‐Emitting Diodes: Charge Recombination in Polaron Pairs: A Key Factor for Operational Stability of Blue‐Phosphorescent Light‐Emitting Devices (Adv. Theory Simul. 8/2020)

2020 ◽  
Vol 3 (8) ◽  
pp. 2070019
Author(s):  
Alexey Odinokov ◽  
Alexey Osipov ◽  
Juwon Oh ◽  
Yu Kyung Moon ◽  
Soo‐Ghang Ihn ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Charge Recombination ◽  
Operational Stability ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Key Factor ◽  
Blue Phosphorescent

scholarly journals Phenanthro[9,10-d]triazole and imidazole derivatives: high triplet energy host materials for blue phosphorescent organic light emitting devices

2019 ◽  
Vol 6 (6) ◽  
pp. 1179-1186 ◽  
Author(s):  
Muazzam Idris ◽  
Caleb Coburn ◽  
Tyler Fleetham ◽  
JoAnna Milam-Guerrero ◽  
Peter I. Djurovich ◽  
...  
Keyword(s):  
Transport Properties ◽  
Light Emitting Diodes ◽  
Wide Bandgap ◽  
Organic Light Emitting Diodes ◽  
Triplet Energy ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Host Materials ◽  
Blue Phosphorescent

A class of wide bandgap host materials is introduced as an alternative to carbazole-based hosts to enhance the efficiency and transport properties of organic light emitting diodes (OLEDs).

Charge Recombination in Polaron Pairs: A Key Factor for Operational Stability of Blue‐Phosphorescent Light‐Emitting Devices

2020 ◽  
Vol 3 (8) ◽  
pp. 2000028
Author(s):  
Alexey Odinokov ◽  
Alexey Osipov ◽  
Juwon Oh ◽  
Yu Kyung Moon ◽  
Soo‐Ghang Ihn ◽  
...  
Keyword(s):  
Charge Recombination ◽  
Operational Stability ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Key Factor ◽  
Blue Phosphorescent

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.

Impact of high electric fields on the charge recombination process in organic light-emitting diodes

2000 ◽  
Vol 33 (19) ◽  
pp. 2379-2387 ◽  
Author(s):  
Jan Kalinowski ◽  
Massimo Cocchi ◽  
Piergiulio Di Marco ◽  
Waldemar Stampor ◽  
Gabriele Giro ◽  
...  
Keyword(s):  
Electric Fields ◽  
Light Emitting Diodes ◽  
Charge Recombination ◽  
Recombination Process ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
High Electric Fields

Highly efficient blue phosphorescent organic light-emitting diodes with low operation voltage

2021 ◽  
Vol 142 ◽  
pp. 107229
Author(s):  
Qi Zhu ◽  
Liang Zhou ◽  
Weiqiang Liu ◽  
Yingjie Cui ◽  
Ruixia Wu ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light ◽  
Blue Phosphorescent

High-efficiency red, green and blue phosphorescent homojunction organic light-emitting diodes based on bipolar host materials

2011 ◽  
Vol 12 (5) ◽  
pp. 843-850 ◽  
Author(s):  
Chao Cai ◽  
Shi-Jian Su ◽  
Takayuki Chiba ◽  
Hisahiro Sasabe ◽  
Yong-Jin Pu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials ◽  
Blue Phosphorescent
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