scholarly journals Bright and efficient blue polymer light emitting diodes with reduced operating voltages processed entirely at low-temperature

2015 ◽  
Vol 3 (36) ◽  
pp. 9327-9336 ◽  
Author(s):  
R. L. Z. Hoye ◽  
K. P. Musselman ◽  
M. R. Chua ◽  
A. Sadhanala ◽  
R. D. Raninga ◽  
...  
Keyword(s):  
Low Temperature ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Electron Injector ◽  
Polymer Light Emitting Diodes ◽  
Bright Blue

Efficient and bright blue polyfluorene LEDs, processed entirely below 150 °C, are obtained using an atmospherically synthesized, tunable oxide electron-injector.

Bright Blue Solution Processed Triple-Layer Polymer Light-Emitting Diodes Realized by Thermal Layer Stabilization and Orthogonal Solvents

2013 ◽  
Vol 23 (39) ◽  
pp. 4897-4905 ◽  
Author(s):  
Roman Trattnig ◽  
Leonid Pevzner ◽  
Monika Jäger ◽  
Raphael Schlesinger ◽  
Marco Vittorio Nardi ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Solution Processed ◽  
Light Emitting ◽  
Triple Layer ◽  
Blue Solution ◽  
Polymer Light Emitting Diodes ◽  
Thermal Layer ◽  
Bright Blue

Injecting Inter-Layers and the Built-in Potential of Blue Polymer Light-Emitting Diodes

2000 ◽  
Vol 660 ◽  
Author(s):  
Thomas M. Brown ◽  
Ian S. Millard ◽  
David J. Lacey ◽  
Jeremy H. Burroughes ◽  
Richard H. Friend ◽  
...  
Keyword(s):  
Indium Tin Oxide ◽  
Light Emitting Diodes ◽  
Basic Structure ◽  
Thin Layers ◽  
Carrier Injection ◽  
Semiconducting Polymer ◽  
Light Emitting ◽  
Physical Mechanisms ◽  
Organic Solid ◽  
Polymer Light Emitting Diodes

ABSTRACTThe semiconducting-polymer/injecting-electrode heterojunction plays a crucial part in the operation of organic solid state devices. In polymer light-emitting diodes (LEDs), a common fundamental structure employed is Indium-Tin-Oxide/Polymer/Al. However, in order to fabricate efficient devices, alterations to this basic structure have to be carried out. The insertion of thin layers, between the electrodes and the emitting polymer, has been shown to greatly enhance LED performance, although the physical mechanisms underlying this effect remain unclear. Here, we use electro-absorption measurements of the built-in potential to monitor shifts in the barrier height at the electrode/polymer interface. We demonstrate that the main advantage brought about by inter-layers, such as poly(ethylenedioxythiophene)/poly(styrene sulphonic acid) (PEDOT:PSS) at the anode and Ca, LiF and CsF at the cathode, is a marked reduction of the barrier to carrier injection. The electro- absorption results also correlate with the electroluminescent characteristics of the LEDs.

Geometrically isomeric [Ir(iqbt)(ppy)(hpa)] complexes with differential molecule orientations for efficient near-infrared (NIR) polymer light-emitting diodes (PLEDs)

2021 ◽  
Vol 9 (36) ◽  
pp. 12068-12072
Author(s):  
Wentao Li ◽  
Jiaxiang Liu ◽  
Baowen Wang ◽  
Siyu Hou ◽  
Xingqiang Lü ◽  
...  
Keyword(s):  
Near Infrared ◽  
Light Emitting Diodes ◽  
Dipole Transition ◽  
Transition Dipole ◽  
Light Emitting ◽  
Horizontal Orientation ◽  
Polymer Light Emitting Diodes

Based on geometrical isomerisation of [Ir(C^N1)(C^N2)((N^O))]-tris-heteroleptic Ir(iii)-complexes, the augmented transition dipole transition (TMD) with a preferential horizontal orientation, which is beneficial for their NIR-phosphorescence, is reported.

Efficient electron injection in blue-emitting polymer light-emitting diodes with LiF/Ca/Al cathodes

2001 ◽  
Vol 79 (2) ◽  
pp. 174-176 ◽  
Author(s):  
T. M. Brown ◽  
R. H. Friend ◽  
I. S. Millard ◽  
D. J. Lacey ◽  
J. H. Burroughes ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Electron Injection ◽  
Light Emitting ◽  
Polymer Light Emitting Diodes

Efficient Single Active Layer Electrophosphorescent White Polymer Light-Emitting Diodes

2008 ◽  
Vol 20 (4) ◽  
pp. 696-702 ◽  
Author(s):  
H. B. Wu ◽  
J. H. Zou ◽  
F. Liu ◽  
L. Wang ◽  
A. Mikhailovsky ◽  
...  
Keyword(s):  
Active Layer ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Polymer Light Emitting Diodes
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