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Zwitterionic Electron Injection Layers for Highly Efficient Polymer LEDs

Technology Benefits

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

Technology Application

Polymer LEDs Organic Optoelectronic Devices    This technology is available for licensing.

Detailed Technology Description

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.

Supplementary Information

Patent Number: US8367839B2
Application Number: US2009592761A
Inventor: Li, Huaping | Xu, Yunhua | Bazan, Guillermo C.
Priority Date: 1 Dec 2008
Priority Number: US8367839B2
Application Date: 1 Dec 2009
Publication Date: 5 Feb 2013
IPC Current: C07D040314 | C07F000502
US Class: 548110
Assignee Applicant: The Regents of the University of California
Title: Tetrakis(1-imidazolyl) borate (BIM4) based zwitterionic and related molecules used as electron injection layers
Usefulness: Tetrakis(1-imidazolyl) borate (BIM4) based zwitterionic and related molecules used as electron injection layers
Summary: The zwitterionic and/or related molecules are useful for the fabrication of polymer LEDs.
Novelty: Producing zwitterionic and/or related molecules, useful for the fabrication of polymer LEDs, comprises reacting alkylating reagents with sodium tetrakis(1-imidazolyl)borate

Industry

Chemical/Material

Sub Category

Chemical/Material Application

Application No.

8367839

Others

Background

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.

Additional Technologies by these Inventors

• Water-Soluble ETL Polymers for LEDs
• Zwitterionic Catalyst for Olefin Polymerization
• Binaphthol-Based Chromophores for Fabrication of Blue LEDs
• Quasi-living metal catalyst for ethylene (homo/co)polymerization
• Method for Preparing Tapered Block Copolymers
• High Mobility Organic Semiconductors

Tech ID/UC Case

21391/2008-801-0

Related Cases

2008-801-0

*Abstract

A novel composition for electron injection layers applicable in PLEDs.

*IP Issue Date

Feb 5, 2013

*Principal Investigator

Name: Guillermo Bazan

Department:

Name: Huaping Li

Department:

Name: Yunhua Xu

Department:

Country/Region

USA