Carbazole Containing Iridium Compounds that Exhibit Broad Emission


Conventional, inorganic crystal-light emitting devices are used in many display applications. Unfortunately, because of their high cost and brittle crystal growth these materials do not work for flexible or large area displays. Organic, light-emitting diodes use less expensive materials and allow for better design parameters. Most organic emitters operate within a narrow bandwidth of wavelengths. Devices frequently incorporate multiple narrow emitters to produce wider wavelengths.

Researchers at Arizona State University have developed a novel organic light-emitting diode that operates in wide wavelengths from 475 to 650 nm. Because the material is capable of emitting the full spectrum of visible light displays can be manufactured with fewer steps and parts. The phosphorescent iridium (III) complex eliminates the need to use multiple narrow emitters, which saves money and is simpler to manufacture. The material shows promise for backlighting displays and for general lighting purposes.

Potential Applications

  • Flexible and large area displays
  • Wall lighting
  • Electronic devices

Benefits and Advantages

  • Lower Costs – Organic materials are less expensive than materials used in liquid crystal displays.
  • Simpler Manufacturing – Limits the number of materials used in manufacturing.
  • New Applications – Provides new, general lighting sources that use less energy.

For more information about the inventor(s) and their research, please see
Dr. Jian Li's directory webpage

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Jian Li Eric Turner

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