Enhancement of Electron Injection in Organic Light Emitting Diodes Using an Ultrathin Sodium Carbonate Buffer Layer

2010 ◽  
Vol 157 (4) ◽  
pp. J135 ◽  
Author(s):  
Po-Ching Kao ◽  
Jing-Yuan Wang ◽  
Jie-Han Lin ◽  
Sy-Hann Chen
Keyword(s):  
Buffer Layer ◽  
Sodium Carbonate ◽  
Light Emitting Diodes ◽  
Electron Injection ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Carbonate Buffer ◽  
Organic Light ◽  
Sodium Carbonate Buffer

scholarly journals Unravelling the electron injection/transport mechanism in organic light-emitting diodes

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Tsubasa Sasaki ◽  
Munehiro Hasegawa ◽  
Kaito Inagaki ◽  
Hirokazu Ito ◽  
Kazuma Suzuki ◽  
...  
Keyword(s):  
Work Function ◽  
Transport Mechanism ◽  
Light Emitting Diodes ◽  
Light Emitting Diode ◽  
Electron Injection ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
Materials Used

AbstractAlthough significant progress has been made in the development of light-emitting materials for organic light-emitting diodes along with the elucidation of emission mechanisms, the electron injection/transport mechanism remains unclear, and the materials used for electron injection/transport have been basically unchanged for more than 20 years. Here, we unravelled the electron injection/transport mechanism by tuning the work function near the cathode to about 2.0 eV using a superbase. This extremely low-work function cathode allows direct electron injection into various materials, and it was found that organic materials can transport electrons independently of their molecular structure. On the basis of these findings, we have realised a simply structured blue organic light-emitting diode with an operational lifetime of more than 1,000,000 hours. Unravelling the electron injection/transport mechanism, as reported in this paper, not only greatly increases the choice of materials to be used for devices, but also allows simple device structures.

A Robust Yellow-Emitting Metallophosphor with Electron-Injection/-Transporting Traits for Highly Efficient White Organic Light-Emitting Diodes

ChemPhysChem ◽  
2011 ◽  
Vol 12 (15) ◽  
pp. 2836-2843 ◽  
Author(s):  
Guijiang Zhou ◽  
Xiaolong Yang ◽  
Wai-Yeung Wong ◽  
Qi Wang ◽  
Si Suo ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Electron Injection ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light
Sign in / Sign up

Export Citation Format

Share Document