Highly efficient and low voltage silver nanowire-based OLEDs employing a n-type hole injection layer

Nanoscale ◽  
2014 ◽  
Vol 6 (15) ◽  
pp. 8565-8570 ◽  
Author(s):  
Hyungjin Lee ◽  
Donghwa Lee ◽  
Yumi Ahn ◽  
Eun-Woo Lee ◽  
Lee Soon Park ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Low Voltage ◽  
Silver Nanowire ◽  
Organic Light Emitting Diodes ◽  
Hole Injection ◽  
High Current ◽  
Light Emitting ◽  
Turn On ◽  
Organic Light ◽  
Transparent Conducting

The organic light-emitting diodes with an AgNW transparent conducting electrode exhibit remarkable mechanical flexibility and excellent device characteristics such as very low turn-on voltage and extremely high current and power efficiencies.

Single-Carrier Devices for the Understanding of the Voltage Drift in Organic Light Emitting Diodes

2011 ◽  
Vol 1359 ◽  
Author(s):  
J. Boizot ◽  
V. Gohri ◽  
H. Doyeux
Keyword(s):  
Light Emitting Diodes ◽  
Low Voltage ◽  
Electron Injection ◽  
Organic Light Emitting Diodes ◽  
Hole Injection ◽  
Constant Current ◽  
Light Emitting ◽  
Single Carrier ◽  
Organic Light ◽  
Voltage Drift

ABSTRACTThe aim of this study is to analyze and mitigate the voltage drift phenomenon observed in top-emitting organic light emitting diodes (OLED) when driven at constant current. An operating device may experience voltage increase over time due to factors such as interface or bulk material degradation, charge accumulation and formation of trap states. Single-carrier devices were fabricated to understand the contribution to voltage drift from each of these causes. Doping in electron injection layer (4, 7-diphenyl-1,10-phenanthroline or Bphen) and hole injection layer (2,2’,7,7’-tetra(N,N-di-tolyl)amino-spiro-bifluorene or Spiro-TTB) were optimized to obtain ohmic injection contacts. Devices with tris(8-hydroxy-quinoline) aluminium (Alq3) degrade significantly with holes injection and undergo high voltage increase in lifetime test measurements. On the contrary, devices with N,N’-di(naphtalen-1-y1)-N,N’-diphenyl-benzidine (NPB) exhibit an ambipolar charge transport behavior and low voltage drift under both hole and electron injection.

Low-voltage and high-stability p-type doped blue organic light-emitting diodes with bilayer hole-injection layers

2011 ◽  
Vol 208 (10) ◽  
pp. 2321-2324 ◽  
Author(s):  
Lin Lu ◽  
Jianning Yu ◽  
Li Long ◽  
Fangfang Yu ◽  
Jianhua Zhang ◽  
...  
Keyword(s):  
High Stability ◽  
Light Emitting Diodes ◽  
Low Voltage ◽  
Organic Light Emitting Diodes ◽  
Hole Injection ◽  
Light Emitting ◽  
Organic Light ◽  
P Type

High performance organic light emitting diodes using substoichiometric tungsten oxide as efficient hole injection layer

2012 ◽  
Vol 13 (5) ◽  
pp. 796-806 ◽  
Author(s):  
Maria Vasilopoulou ◽  
George Papadimitropoulos ◽  
Leonidas C. Palilis ◽  
Dimitra G. Georgiadou ◽  
Panagiotis Argitis ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Hole Injection ◽  
Light Emitting ◽  
Hole Injection Layer ◽  
Organic Light
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