Highly Promoting the Performances of Polymer Light-Emitting Diodes via Control of the Residue of a Polar Solvent on an Emissive Layer

2017 ◽  
Vol 9 (22) ◽  
pp. 18399-18404 ◽  
Author(s):  
Qiaoli Niu ◽  
Hengsheng Wu ◽  
Wentao Huang ◽  
Jing Tong ◽  
Fengye Ye ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Polar Solvent ◽  
Light Emitting ◽  
Emissive Layer ◽  
Polymer Light Emitting Diodes

Directed migration of additives to form top interlayers in polymer light emitting diodes

2017 ◽  
Vol 5 (48) ◽  
pp. 12744-12751 ◽  
Author(s):  
L. Nouzman ◽  
G. L. Frey
Keyword(s):  
Light Emitting Diodes ◽  
Solution Processing ◽  
Light Emitting ◽  
Emissive Layer ◽  
Directed Migration ◽  
Polymer Light Emitting Diodes ◽  
Cathode Interface

A new methodology to self-generate interlayers at the emissive layer/cathode interface in OLEDs that is fully compatible with solution processing and enhances device performances.

scholarly journals Study on the Optoelectronic Properties of UV Luminescent Polymer: ZnO Nanoparticles Dispersed PANI

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
J. Kayathri ◽  
N. RaniMeiyammai ◽  
S. Rani ◽  
K. P. Bhuvana ◽  
K. Palanivelu ◽  
...  
Keyword(s):  
Thin Films ◽  
Zno Nanoparticles ◽  
Light Emitting Diodes ◽  
Hexagonal Wurtzite Structure ◽  
Film Material ◽  
Potassium Persulphate ◽  
Visible Absorption ◽  
Light Emitting ◽  
Emissive Layer ◽  
Polymer Light Emitting Diodes

The present work is focused on the synthesis and characterization of a new polymer thin film material suitable for emissive layer in polymer light-emitting diodes. Thin films of polyaniline and ZnO nanoparticles dispersed polyaniline have been prepared and investigated for the suitability of emissive layer in polymer light emitting diodes. ZnO nanoparticles have been synthesized using wet chemical method and characterized using powder X-ray diffraction. Diffraction pattern reveals that the ZnO nanoparticles are grown in hexagonal wurtzite structure with the preferential orientation of (001) plane. Polyaniline was synthesized using potassium persulphate (initiator) at room temperature. ZnO nanoparticles are then dispersed in different doping level (5%, 10%, 15% 20% and 50%) with polyaniline. Thin films of ZnO dispersed polyaniline (PANI/ZnO) were prepared and characterized using scanning electron microscopy in order to investigate the surface morphology of the film. The optical characteristics and the suitability of film as emissive layer were analyzed using UV-visible absorption and fluorescence spectroscopy.

White polymer light emitting diodes based on PVK: the effect of the electron injection barrier on transport properties, electroluminescence and controlling the electroplex formation

2016 ◽  
Vol 18 (48) ◽  
pp. 33077-33084 ◽  
Author(s):  
Dipjyoti Das ◽  
Peddaboodi Gopikrishna ◽  
Rahul Narasimhan ◽  
Ashish Singh ◽  
Anamika Dey ◽  
...  
Keyword(s):  
Charge Transport ◽  
Transport Properties ◽  
Light Emitting Diodes ◽  
Electron Injection ◽  
Light Emitting ◽  
Emissive Layer ◽  
Polymer Light Emitting Diodes ◽  
Injection Barrier

The influence of the electron injection barrier on charge transport, brightness and EL properties of WPLEDs with PVK as an emissive layer has been reported.

Combination effect of polar solvent treatment on ZnO and polyfluorene-based polymer blends for highly efficient blue-based hybrid organic–inorganic polymer light-emitting diodes

2014 ◽  
Vol 2 (41) ◽  
pp. 8673-8677 ◽  
Author(s):  
Seungjin Lee ◽  
Bo Ram Lee ◽  
Ji-Seon Kim ◽  
Myoung Hoon Song
Keyword(s):  
Polymer Blends ◽  
Light Emitting Diodes ◽  
Polar Solvent ◽  
Inorganic Polymer ◽  
Combination Effect ◽  
Hole Trap ◽  
Solvent Treatment ◽  
Light Emitting ◽  
Device Efficiency ◽  
Polymer Light Emitting Diodes

Device efficiency is enhanced by the combination effect of polar solvent treatment on ZnO and hole trap using F8:TFB blend.

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
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