scholarly journals Highly polarized polymer light-emitting diodes utilizing friction-transferred poly(9,9-dioctylfluorene) thin films

2005 ◽  
Vol 87 (24) ◽  
pp. 243503 ◽  
Author(s):  
Masahiro Misaki ◽  
Yasukiyo Ueda ◽  
Shuichi Nagamatsu ◽  
Masayuki Chikamatsu ◽  
Yuji Yoshida ◽  
...  
Keyword(s):  
Thin Films ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Polymer Light Emitting Diodes

One-Step Deposition of Self-Oriented $\beta$-Phase Polyfluorene Thin Films for Polarized Polymer Light-Emitting Diodes

2012 ◽  
Vol 5 (9) ◽  
pp. 092101 ◽  
Author(s):  
Arnaud Dauendorffer ◽  
Shougo Miyajima ◽  
Shuichi Nagamatsu ◽  
Wataru Takashima ◽  
Shuzi Hayase ◽  
...  
Keyword(s):  
Thin Films ◽  
Light Emitting Diodes ◽  
Beta Phase ◽  
Light Emitting ◽  
One Step ◽  
Polymer Light Emitting Diodes

Optoelectronic characteristics of MEH-PPV + BT blend thin films in polymer light emitting diodes

2015 ◽  
Vol 30 (6) ◽  
pp. 065016 ◽  
Author(s):  
M Massah Bidgoli ◽  
M Mohsennia ◽  
F Akbari Boroumand ◽  
A Mohsen Nia
Keyword(s):  
Thin Films ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Polymer Light Emitting Diodes

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.

scholarly journals Quantum-Dot and Polychalcone Mixed Nanocomposites for Polymer Light-Emitting Diodes

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Vanaraj Ramkumar ◽  
Sanghyun Ju
Keyword(s):  
Thin Films ◽  
Quantum Dots ◽  
Carrier Transport ◽  
Light Emitting Diodes ◽  
Polymeric Materials ◽  
Charge Carrier Transport ◽  
Polymer Leds ◽  
Light Emitting ◽  
Polymer Light Emitting Diodes ◽  
Better Than

The present work is aimed at improving the efficiency of light-emitting diodes (LEDs) through the amalgamation of polymeric materials and quantum dots (QDs) in nanocomposites. Herein, we report on the polytriphenylamine-based chalcone (PTpC) or polycarbazole-based chalcone- (PCzC-) QDs mixture nanocomposites as emissive layers for polymer LEDs (PLEDs). QDs were evenly dispersed in the polymer matrix and the synthesized PTpC-QDs and PCzC-QDs nanocomposites were able to form smooth thin films. The luminance characteristics of PTpC-QDs and PCzC-QDs nanocomposites were better than those of the pristine QD, PTpC, and PCzC materials, owing to the high charge-carrier transport ability of polymer-QDs nanocomposites. These results indicate that the proposed polymer-QDs nanocomposites could be potential candidates for application in PLEDs.

Polymer light emitting diodes and poly(di-n-octylfluorene) thin films as fabricated with a microfluidics applicator

2006 ◽  
Vol 100 (7) ◽  
pp. 073510 ◽  
Author(s):  
H. Cheun ◽  
P. P. Rugheimer ◽  
B. J. Larson ◽  
P. Gopalan ◽  
M. G. Lagally ◽  
...  
Keyword(s):  
Thin Films ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Polymer Light Emitting Diodes

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.

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