Hole injection SiO/sub 2/ breakdown model for very low voltage lifetime extrapolation

1994 ◽  
Vol 41 (5) ◽  
pp. 761-767 ◽  
Author(s):  
K.F. Schuegraf ◽  
Chenming Hu
Keyword(s):  
Low Voltage ◽  
Hole Injection ◽  
Breakdown Model

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.

Dendron engineering in self-host blue iridium dendrimers towards low-voltage-driving and power-efficient nondoped electrophosphorescent devices

2017 ◽  
Vol 53 (1) ◽  
pp. 180-183 ◽  
Author(s):  
Yang Wang ◽  
Shumeng Wang ◽  
Junqiao Ding ◽  
Lixiang Wang ◽  
Xiabin Jing ◽  
...  
Keyword(s):  
Energy Level ◽  
Low Voltage ◽  
Hole Injection ◽  
Homo Energy ◽  
Power Efficient ◽  
Homo Energy Level

Low-voltage-driving and power-efficient nondoped electrophosphorescent devices have been realized by increasing the dendron's HOMO energy level to favor effective hole injection and promote exciton formation.

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.

scholarly journals Efficient and bright warm-white electroluminescence from lead-free metal halides

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Hong Chen ◽  
Lin Zhu ◽  
Chen Xue ◽  
Pinlei Liu ◽  
Xuerong Du ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Low Voltage ◽  
Metal Halide ◽  
Lead Free ◽  
Hole Injection ◽  
Great Promise ◽  
Metal Halides ◽  
Solution Processed ◽  
White Electroluminescence ◽  
Free Metal

AbstractSolution-processed metal-halide perovskites are emerging as one of the most promising materials for displays, lighting and energy generation. Currently, the best-performing perovskite optoelectronic devices are based on lead halides and the lead toxicity severely restricts their practical applications. Moreover, efficient white electroluminescence from broadband-emission metal halides remains a challenge. Here we demonstrate efficient and bright lead-free LEDs based on cesium copper halides enabled by introducing an organic additive (Tween, polyethylene glycol sorbitan monooleate) into the precursor solutions. We find the additive can reduce the trap states, enhancing the photoluminescence quantum efficiency of the metal halide films, and increase the surface potential, facilitating the hole injection and transport in the LEDs. Consequently, we achieve warm-white LEDs reaching an external quantum efficiency of 3.1% and a luminance of 1570 cd m−2 at a low voltage of 5.4 V, showing great promise of lead-free metal halides for solution-processed white LED applications.

Experimental study of low voltage anode hole injection in thin oxides

2001 ◽  
Vol 59 (1-4) ◽  
pp. 55-60
Author(s):  
David Esseni ◽  
Jeff D Bude ◽  
Luca Selmi
Keyword(s):  
Experimental Study ◽  
Low Voltage ◽  
Hole Injection ◽  
Anode Hole ◽  
Anode Hole 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
Sign in / Sign up

Export Citation Format

Share Document