Effects of interfacial stability between electron transporting layer and cathode on the degradation process of organic light-emitting diodes

2007 ◽  
Vol 91 (22) ◽  
pp. 223509 ◽  
Author(s):  
Ta-Ya Chu ◽  
Yong-Han Lee ◽  
Ok-Keun Song
Keyword(s):  
Light Emitting Diodes ◽  
Degradation Process ◽  
Organic Light Emitting Diodes ◽  
Interfacial Stability ◽  
Light Emitting ◽  
Organic Light ◽  
Electron Transporting Layer

Synthesis and Application of Electronic Transporting Materials

2011 ◽  
Vol 687 ◽  
pp. 179-182
Author(s):  
Ting Xi Li ◽  
Su Su Gao ◽  
Peng Sui ◽  
Na Kong ◽  
Sha Sha Wu ◽  
...  
Keyword(s):  
Solid State ◽  
Energy Saving ◽  
Environmental Protection ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Solid State Lighting ◽  
Light Emitting ◽  
Lighting Technology ◽  
Organic Light ◽  
Electron Transporting Layer

Novel pyridine-containing compounds were synthesized and their properties were studied. Organic EL devices using these compounds as electron-transporting layer were fabricated. It is demonstrated that these compounds are useful for organic light-emitting diodes (OLED) and solid state lighting technology in favor of energy-saving and environmental protection fields.

Solution-processed oxadiazole-based electron-transporting layer for white organic light-emitting diodes

RSC Advances ◽  
2015 ◽  
Vol 5 (46) ◽  
pp. 36568-36574 ◽  
Author(s):  
Ronghua Liu ◽  
Xinjun Xu ◽  
Jinghong Peng ◽  
Chuang Yao ◽  
Jinshan Wang ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Solution Processed ◽  
Light Emitting ◽  
Organic Light ◽  
Electron Transporting Layer ◽  
Control Devices

Alcohol-soluble oxadiazole-based compound as electron-transporting layer in solution-processed OLEDs shows much improved efficiency compared to control devices.

scholarly journals Probing polaron-induced exciton quenching in TADF based organic light-emitting diodes

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
Monirul Hasan ◽  
Siddhartha Saggar ◽  
Atul Shukla ◽  
Fatima Bencheikh ◽  
Jan Sobus ◽  
...  
Keyword(s):  
Electric Field ◽  
Light Emitting Diodes ◽  
Degradation Process ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Contributing Factors ◽  
Theoretical Simulation ◽  
Light Emitting ◽  
Organic Light ◽  
The Impact

AbstractPolaron-induced exciton quenching in thermally activated delayed fluorescence (TADF)-based organic light-emitting diodes (OLEDs) can lead to external quantum efficiency (EQE) roll-off and device degradation. In this study, singlet-polaron annihilation (SPA) and triplet-polaron annihilation (TPA) were investigated under steady-state conditions and their relative contributions to EQE roll-off were quantified, using experimentally obtained parameters. It is observed that both TPA and SPA can lead to efficiency roll-off in 2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile (4CzIPN) doped OLEDs. Charge imbalance and singlet-triplet annihilation (STA) were found to be the main contributing factors, whereas the device degradation process is mainly dominated by TPA. It is also shown that the impact of electric field-induced exciton dissociation is negligible under the DC operation regime (electric field < 0.5 MV cm−1). Through theoretical simulation, it is demonstrated that improvement to the charge recombination rate may reduce the effect of polaron-induced quenching, and thus significantly decrease the EQE roll-off.

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