Efficient white polymer light-emitting diodes from single polymer exciplex electroluminescence

2017 ◽  
Vol 5 (9) ◽  
pp. 2397-2403 ◽  
Author(s):  
Junfei Liang ◽  
Zhenji Zhong ◽  
Shuang Li ◽  
Xiao-Fang Jiang ◽  
Lei Ying ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Light Emitting ◽  
Color Coordinates ◽  
Polymer Light Emitting Diodes ◽  
Cavity Effects ◽  
Micro Cavity

The electroluminescence efficiency of PTFS can be improved by incorporating poly(9-vinylcarbazole) and color coordinates can be modified by micro-cavity effects.

Near-infrared polymer light-emitting diodes based on an inverted device structure

2019 ◽  
Vol 7 (39) ◽  
pp. 12114-12120 ◽  
Author(s):  
Jin Xu ◽  
Feng Peng ◽  
Zhenzhong Sun ◽  
Lei Yu ◽  
Wei Yang ◽  
...  
Keyword(s):  
Near Infrared ◽  
Infrared Emission ◽  
Device Structure ◽  
Light Emitting ◽  
Polymer Light Emitting Diodes ◽  
Cavity Effects ◽  
Micro Cavity ◽  
Near Infrared Emission ◽  
Inverted Device ◽  
Inverted Device Structure

Micro-cavity effects were applied to acquire near-infrared emission using normal red-emitting materials through an inverted device structure.

Straight-forward control of the degree of micro-cavity effects in organic light-emitting diodes based on a thin striped metal layer

2013 ◽  
Vol 14 (10) ◽  
pp. 2444-2450 ◽  
Author(s):  
Jonghee Lee ◽  
Hyunsu Cho ◽  
Tae-Wook Koh ◽  
Simone Hofmann ◽  
Yong Hyun Kim ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Metal Layer ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Cavity Effects ◽  
Micro Cavity

Highly efficient bi-directional organic light-emitting diodes by strong micro-cavity effects

2011 ◽  
Vol 99 (7) ◽  
pp. 073303 ◽  
Author(s):  
Jonghee Lee ◽  
Simone Hofmann ◽  
Michael Thomschke ◽  
Mauro Furno ◽  
Yong Hyun Kim ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light ◽  
Cavity Effects ◽  
Micro Cavity

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

scholarly journals Air stable and highly efficient Bi3+-doped Cs2SnCl6 for blue light-emitting diodes

RSC Advances ◽  
2021 ◽  
Vol 11 (42) ◽  
pp. 26415-26420
Author(s):  
Yue Yao ◽  
Si-Wei Zhang ◽  
Zijian Liu ◽  
Chun-Yun Wang ◽  
Ping Liu ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Blue Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Color Coordinates ◽  
Blue Led ◽  
Highly Efficient ◽  
Photoluminescence Quantum Yield ◽  
Long Life

A Bi3+-doped Cs2SnCl6 exhibits photoluminescence at around 456 nm and a photoluminescence quantum yield of 31%. The blue LED based on the Bi3+-doped Cs2SnCl6 phosphor exhibits a long life of 120 hours and a CIE color coordinates of (0.14, 0.11).

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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