National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

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High Efficiency LED Lamp for Solid-State Lighting. (Final Report, October 1, 2003-December 31, 2006).

DE2007920191

Publication Date	2007
Personal Author	Ibbetson, J.
Page Count	23
Abstract	This report contains a summary of technical achievements during a three-year project to demonstrate high efficiency, solid-state lamps based on gallium nitride/silicon carbide light emitting diodes. Novel chip designs and fabrication processes are described for a new type of nitride light-emitting diode with the potential for very high efficiency. This work resulted in the demonstration of blue light-emitting diodes in the one watt class that achieved up to 495 mW of light output at 350 mA drive current, corresponding to quantum and wall plug efficiencies of 51% and 45%, respectively. When combined with a phosphor in Crees 7090 XLamp package, these advanced blue-emitting devices resulted in white light-emitting diodes whose efficacy exceeded 85 lumens per watt. In addition, up to 1040 lumens at greater than 85 lumens per watt was achieved by combining multiple devices to make a compact white lamp module with high optical efficiency.
Keywords	Solid state lamps Light emitting diodes Chip designs Fabrication processes Light output Lumens Gallium nitride/silicon carbide
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Cree Santa Barbara Technology Center, Goleta, CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200810
Contract Number	DE-FC26-03NT41943

High Efficiency LED Lamp for Solid-State Lighting. (Final Report, October 1, 2003-December 31, 2006).

High Efficiency LED Lamp for Solid-State Lighting. (Final Report, October 1, 2003-December 31, 2006).
DE2007920191

Publication Date	2007
Personal Author	Ibbetson, J.
Page Count	23
Abstract	This report contains a summary of technical achievements during a three-year project to demonstrate high efficiency, solid-state lamps based on gallium nitride/silicon carbide light emitting diodes. Novel chip designs and fabrication processes are described for a new type of nitride light-emitting diode with the potential for very high efficiency. This work resulted in the demonstration of blue light-emitting diodes in the one watt class that achieved up to 495 mW of light output at 350 mA drive current, corresponding to quantum and wall plug efficiencies of 51% and 45%, respectively. When combined with a phosphor in Crees 7090 XLamp package, these advanced blue-emitting devices resulted in white light-emitting diodes whose efficacy exceeded 85 lumens per watt. In addition, up to 1040 lumens at greater than 85 lumens per watt was achieved by combining multiple devices to make a compact white lamp module with high optical efficiency.
Keywords	Solid state lamps Light emitting diodes Chip designs Fabrication processes Light output Lumens Gallium nitride/silicon carbide
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Cree Santa Barbara Technology Center, Goleta, CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200810
Contract Number	DE-FC26-03NT41943