Osmium based Organic Light Emitting Diodes (OLEDs)

Introduction OLED-based displays are being incorporated into digital cameras and cell phones. Bright, vivid colors and a wide viewing angle are the key advantages of these OLED displays. Current OLED technologies and products are susceptible to water and oxygen reactivity damage and exhibit low efficiency. Encapsulation of these displays is critical to prevent degradation. Technology description The inventors have systematically engineered a series of osmium based OLED emitters. The first in this series produces a vibrant red color. Further engineering of the emitters has produced a spectrum of colors, including white. These compounds are both highly efficient (phosphorescent) and can be incorporated into simple two layer devices using solution-based processing. It is anticipated that devices will be constructed using no encapsulation layers without compromising the emitter lifetime. Lighting devices and displays can be economically built on both glass and flexible substrates. Business opportunity Both the individual emitters and their combination in color display or white light applications show significant promise. The solid-state LED lighting market alone is anticipated to grow to over $500 million annually within the next 3 years. A combination of colors or the white emitter can be used to produce solid-state white light devices. A number of niche applications, for example safety lighting, can be targeted with the individual color emitters, such as the bright, vibrant red. Stage of development Prototype red-light emitting devices have been constructed, demonstrating the efficiency, brightness, and long-life of these osmium-based compounds. Intellectual property position The UW has applied for patent protection on this technology. Reference J. Am. Chem. Soc., 124, 14162 -14172, 2002

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