Low-voltage inverted organic light-emitting diodes with double-layer election injection layer based on silicon dioxide

2019 ◽  
Vol 115 (8) ◽  
pp. 083301 ◽  
Author(s):  
Lei Ding ◽  
Jiang-Nan Wang ◽  
Ting Ni ◽  
Fang-Hui Zhang
Keyword(s):  
Silicon Dioxide ◽  
Double Layer ◽  
Light Emitting Diodes ◽  
Low Voltage ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light

Tuning peripheral group density in ternary phosphine oxide hosts for low-voltage-driven yellow PhOLEDs

2015 ◽  
Vol 3 (26) ◽  
pp. 6709-6716 ◽  
Author(s):  
Jing Li ◽  
Zhensong Zhang ◽  
Chunmiao Han ◽  
Dongxue Ding ◽  
Yi Zhao ◽  
...  
Keyword(s):  
Phosphine Oxide ◽  
Light Emitting Diodes ◽  
Low Voltage ◽  
Organic Light Emitting Diodes ◽  
Diphenylphosphine Oxide ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials ◽  
Group Density

Fluorene and diphenylphosphine oxide were employed as peripheral groups to construct ternary host materials DBFxPODEFn with benzofuran as a core, which realized the low-voltage-driven efficient yellow phosphorescence organic light-emitting diodes.

Low-voltage organic light-emitting diodes by doped amorphous hole transport layers

2002 ◽  
Author(s):  
Jan Blochwitz ◽  
Martin Pfeiffer ◽  
Xiang Zhou ◽  
Ansgar Werner ◽  
Michael Hofmann ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Low Voltage ◽  
Hole Transport ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Hole Transport Layers

Low-voltage inverted transparent vacuum deposited organic light-emitting diodes using electrical doping

2002 ◽  
Vol 81 (5) ◽  
pp. 922-924 ◽  
Author(s):  
X. Zhou ◽  
M. Pfeiffer ◽  
J. S. Huang ◽  
J. Blochwitz-Nimoth ◽  
D. S. Qin ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Low Voltage ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light

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.

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