scholarly journals Quantification of hole-trap concentration in degraded polymer light-emitting diodes using impedance spectroscopy

2019 ◽  
Vol 114 (16) ◽  
pp. 163301 ◽  
Author(s):  
Quan Niu ◽  
Gert-Jan A. H. Wetzelaer ◽  
Paul W. M. Blom ◽  
N. Irina Crăciun
Keyword(s):  
Impedance Spectroscopy ◽  
Light Emitting Diodes ◽  
Hole Trap ◽  
Light Emitting ◽  
Trap Concentration ◽  
Polymer Light Emitting Diodes ◽  
Degraded Polymer

Charge transport study of polymer light emitting diodes by impedance spectroscopy

2012 ◽  
Author(s):  
Manisha Bajpai ◽  
Ritu Srivastava ◽  
M. N. Kamalasanan ◽  
R. S. Tiwari ◽  
Suresh Chand
Keyword(s):  
Impedance Spectroscopy ◽  
Charge Transport ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Transport Study ◽  
Polymer Light Emitting Diodes

Modeling of Electrical Characteristics of Degraded Polymer Light-Emitting Diodes

2016 ◽  
Vol 2 (8) ◽  
pp. 1600103 ◽  
Author(s):  
Quan Niu ◽  
Gert-Jan A. H. Wetzelaer ◽  
Paul W. M. Blom ◽  
Nicoleta I. Crăciun
Keyword(s):  
Light Emitting Diodes ◽  
Electrical Characteristics ◽  
Light Emitting ◽  
Polymer Light Emitting Diodes ◽  
Degraded Polymer

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.

Study of polymer-electrode interfaces in polymer light-emitting diodes using electrical impedance spectroscopy

2002 ◽  
Vol 734 ◽  
Author(s):  
A. van Dijken ◽  
I.N. Hulea ◽  
H.B. Brom ◽  
K. Brunner
Keyword(s):  
Impedance Spectroscopy ◽  
Double Layer ◽  
Electrical Impedance ◽  
Light Emitting Diodes ◽  
Single Layer ◽  
Charge Trapping ◽  
Electrical Impedance Spectroscopy ◽  
Time Dependent ◽  
Light Emitting ◽  
Polymer Light Emitting Diodes

ABSTRACTElectrical impedance spectroscopy is used to show that time-dependent charge trapping processes occur in double-layer polymer light-emitting diodes based on poly(ethylene-dioxythiophene):poly(styrene sulfonic acid) (PEDOT:PSS) and poly(p-phenylene vinylene) (PPV). No time-dependent charge trapping processes are observed in single-layer devices based on PPV only. Furthermore, in double-layer devices based on poly(2,7-spirofluorene) (PSF) instead of PPV, such processes are also absent. Traps are probably created in the PPV layer close to the PEDOT:PSS interface due to chemical reactions that occur specifically between PEDOT:PSS and PPV.

Hole trap formation in polymer light-emitting diodes under current stress

2018 ◽  
Vol 17 (6) ◽  
pp. 557-562 ◽  
Author(s):  
Quan Niu ◽  
Roland Rohloff ◽  
Gert-Jan A. H. Wetzelaer ◽  
Paul W. M. Blom ◽  
N. Irina Crăciun
Keyword(s):  
Light Emitting Diodes ◽  
Hole Trap ◽  
Light Emitting ◽  
Current Stress ◽  
Trap Formation ◽  
Polymer Light Emitting Diodes

scholarly journals Exciton Quenching due to Hole Trap Formation in Aged Polymer Light‐Emitting Diodes

2020 ◽  
Vol 6 (7) ◽  
pp. 1700643
Author(s):  
Irina Rörich ◽  
Quan Niu ◽  
Bas der Zee ◽  
Esther del Pino Rosendo ◽  
Nicoleta Irina Crăciun ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Hole Trap ◽  
Light Emitting ◽  
Trap Formation ◽  
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.

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