Engineering of charge transport materials for universal low optimum doping concentration in phosphorescent organic light-emitting diodes

2012 ◽  
Vol 13 (2) ◽  
pp. 341-349 ◽  
Author(s):  
Chang Woo Seo ◽  
Ji Hwan Yoon ◽  
Jun Yeob Lee
Keyword(s):  
Charge Transport ◽  
Doping Concentration ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Optimum Doping Concentration

scholarly journals Oxadiazole derivatives as bipolar host materials for high-performance blue and green phosphorescent organic light-emitting diodes

RSC Advances ◽  
2019 ◽  
Vol 9 (55) ◽  
pp. 32010-32016
Author(s):  
Yanming Wang ◽  
Keke Duan ◽  
Guoxiang Li ◽  
Gewen Yu
Keyword(s):  
Charge Transport ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials ◽  
Oxadiazole Derivatives

A high performance blue OLED has been realized by adjusting the ratio of n-type groups of the molecule and obtaining more balanced charge transport.

Direct monitoring of the recombination zone in highly efficient phosphorescent organic light-emitting diodes based on a high-doping concentration emitting system

2019 ◽  
Vol 7 (42) ◽  
pp. 13287-13293
Author(s):  
Jianan Xue ◽  
Jie Liang ◽  
Xinze Liu ◽  
Hao Zhang ◽  
Kaiqi Ye ◽  
...  
Keyword(s):  
Doping Concentration ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Highly Efficient ◽  
High Doping Concentration ◽  
Organic Light ◽  
System P ◽  
Recombination Zone

The high-content bipolar phosphor (ppy)2Ir(dipba) can dominate the EL process and the recombination zone is almost broadened as wide as the whole EML in D4, leading to remarkably higher efficiency level of D4 than that of D2 based on (ppy)2Ir(acac).

Numerical Simulation on the Electronic Properties in Multilayer Organic Light Emitting Diodes

2012 ◽  
Vol 629 ◽  
pp. 224-228 ◽  
Author(s):  
Kwang Sik Kim ◽  
Young Wook Hwang ◽  
Tae Young Won
Keyword(s):  
Numerical Simulation ◽  
Charge Transport ◽  
Electronic Properties ◽  
Light Emitting Diodes ◽  
Hole Transport ◽  
Organic Light Emitting Diodes ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Light Emitting ◽  
Organic Light

We report our finite element method (FEM) simulation study on the characteristic of the charge transport layer of the multi-layer structure for organic light emitting diodes (OLEDs). The physical model cover all the key physical processes in OLEDs, namely charge injection, transport and recombination, exciton diffusion, transfer and decay for electronic properties. We performed a numerical simulation on a multilayer structure comprising a hole transport layer (HTL), an emission layer (EML), and an electron transport layer (ETL) between both electrodes; anode and cathode. The materials of the HTL is TPD (N, N'-Bis (3- methylphenyl) - N, N'- bis (phenyl) benzidine), and the ETL includes Alq3 (Tris (8- hyroxyquinolinato) aluminium). Here, we investigated the parameters such as recombination rates which influence the efficiency of the charge transport between layers in bilayer OLEDs. We also analyzed a transient response during the turn on period and the carrier transport in accordance with the variation of the injection barrier and applied voltage. In addition, this paper revealed that the effect of the insertion of the EML in bilayer structure.

scholarly journals Storage Lifetime of Polymer-Carbon Nanotube Inks for Use as Charge Transport Layers in Organic Light Emitting Diodes

2014 ◽  
Vol 10 (2) ◽  
pp. 125-131 ◽  
Author(s):  
Christopher A. Mills ◽  
F. Laurent M. Sam ◽  
Abdullah S. Alshammari ◽  
Lynn J. Rozanski ◽  
Neil G. Emerson ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Charge Transport ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light

Charge transport in organic light-emitting diodes: polarons or holes

1994 ◽  
Vol 67 (1-3) ◽  
pp. 177-180 ◽  
Author(s):  
G. Paasch ◽  
W. Rieβ ◽  
S. Karg ◽  
M. Meier ◽  
M. Schwoerer
Keyword(s):  
Charge Transport ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light
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