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Title: Energy Savings Potential of LEDs for Energy Efficient Lighting and Future Research Directions in LEDs
Originating Office: IAS
Speaker: DenBaars, Steven
Issue Date: 4-Jul-2012
Event Date: 4-Jul-2012
Group/Series/Folder: Record Group 8.15 - Institute for Advanced Study
Series 3 - Audio-visual Materials
Location: 8.15:3 box 1.8
Notes: IAS Distinguished Lecture.
Title from opening screen.
Abstract: LEDs fabricated from gallium nitride have led to the realization of high-efficiency white solid-state lighting. At UCSB’s Solid State Lighting and Energy Center Prof DenBaars has fabricated advanced GaN white LEDs structures which exhibit luminous efficacy greater than 170 lm/Watt, and external quantum efficiencies higher than 50%. This has enabled LEDs lighting to compete with traditional lighting technologies such as incandescent and CFL. A review of the energy savings potential of LED based lighting compared to traditional technologies is addressed. The US Department of Energy estimates that in 2030 the energy savings from LED lighting in the US alone would amount to over $250 billion in energy savings, which is equivalent to 50 Gigawatt size power plants. Further improvements in materials quality and cost reduction are necessary for wide-spread adoption of LEDs for lighting. Solid-state lighting has the potential to achieve 85% energy efficiency, corresponding to 255 lm/Watt, and be able to run entirely off sustainable energy sources such as either solar, thermoelectric or wind. Key problems and new research directions in solid state lighting technologies will be highlighted. UCSB research on new crystal orientation shows great promise in achieving high efficiencies at high current densities and lowering the cost of LED lighting.
Prof Steven DenBaars is a Professor of Materials and Co-Director of the Solid-State Lighting Center at the University of California, Santa Barbara (UCSB). He received his PhD in Electrical Engineering from the University of Southern California in 1988. From 1988-1991 Prof DenBaars was a member of the technical staff at Hewlett- Packard's Optoelectronics Division involved in the growth and fabrication of visible LEDs. He joined UCSB in 1991 and currently holds the Mitsubishi Chemical Chair in Solid State Lighting and Displays.
Prof DenBaars’ research interests include growth of wide-band gap semiconductors (GaN based), and their application to Blue LEDs and lasers and energy efficient solid state lighting. This research has led to over 650 scientific publications and over 67 US patents on electronic materials and devices.
Duration: 35 min.
Appears in Series:8.15:3 - Audio-visual Materials
Videos for Public -- Distinguished Lectures