Zwitterionic Electron Injection Layers for Highly Efficient Polymer LEDs

Tech ID: 21391 / UC Case 2008-801-0

Brief Description

A novel composition for electron injection layers applicable in PLEDs.


Since charge injection from a metal electrode into light-emitting diodes (LEDs) remains a significant impediment to device performance, there is a need for improved electron injection layers in order to increase polymer LED (PLED) efficiency.


Researchers at the University of California, Santa Barbara have developed a novel composition for electron injection layers applicable in PLEDs. Electron injection layers of this composition can be deposited via solution methods without disturbing the underlying layer. Due to superior electron injection, PLEDs utilizing this technology are more efficient and perform up to three times better than LEDs with barium/aluminum cathodes.


  • Higher luminance efficiency as compared to LEDs with barium/aluminum cathodes
  • Up to 3X the performance of LEDs with barium/aluminum cathodes due to superior electron injection
  • Deposition via solution methods without disturbance of the underlying layer


  • Polymer LEDs
  • Organic Optoelectronic Devices  


This technology is available for licensing.

Patent Status

Country Type Number Dated Case
United States Of America Issued Patent 8,367,839 02/05/2013 2008-801


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Other Information


Polymer LED, PLED, indled, cenIEE

Categorized As