Pathways to Ultra-Effecient Solid-State Lighting

Photonics Society – 6:30PM, Thursday, 9 April

Pathways to Ultra-Efficient Solid-State Lighting – Mary Crawford – Sandia National Laboratory

Solid-state lighting is a rapidly advancing technology with potential to provide decisive energy savings and functionality well beyond traditional lighting systems. Already, the efficiency of commercial white LEDs has surpassed that of incandescents and exceeds that of compact fluorescents in particular applications. While research and development efforts are now focused on a US DOE target for system efficiency of ~50%, emerging concepts and device architectures may provide opportunities for realizing even higher efficiencies. In this presentation, I will explore the science challenges of achieving “ultra-efficient” solid-state lighting and will highlight recent advances and concepts for overcoming these challenges at the LED-chip level. Topics will include novel approaches to overcoming InGaN LED “efficiency droop” at high currents, the potential for laser-based lighting, and the critical role that nanostructured emitters may play in bridging the “green-yellow gap” in LED efficiency. Finally, I will discuss how such advances may enable smart lighting concepts, providing a new paradigm for how we generate and use light.  

Dr. Mary Crawford is a Senior Scientist in the Semiconductor Material and Device Sciences Department at Sandia National Laboratories in Albuquerque, NM. She received a B. A. degree in physics from Holy Cross College and Sc. M. and Ph.D. degrees in physics from Brown University. She joined Sandia National Laboratories in 1993 where she contributed to R&D of optoelectronic devices including visible vertical-cavity surface-emitting lasers and GaN/AlGaN-based UV LEDs. In 2000, Dr. Crawford embarked on an entrepreneurial leave to serve as a Senior Scientist and Director of R&D at Uniroyal Optoelectronics in Tampa, FL, a start-up company developing visible and near-UV LEDs.   She returned to Sandia in 2002. Her recent interests include development of AlGaInN-based deep UV LEDs and laser diodes and spectroscopic studies of radiative and nonradiative processes in InGaN materials. She has co-authored more than 100 publications and is the recipient of 5 patents.

This meeting begins at 6:30 PM Thursday April 9, 2015 and will be located in the cafeteria at MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA 02420. The meeting is free and open to the public. All are welcome. Prior to the seminar there will be social time and networking from 6:30 – 7:00PM. Dinner will also be provided. The seminar will begin at 7:00PM. For more information contact Jade Wang, Boston IEEE Photonics Society Chapter chair at jpwang@ll.mit.edu, or visit the Boston IEEE Photonics Society website at www.bostonphotonics.org.

Directions to Lincoln Laboratory: (from interstate I-95/Route 128)

From Exit 31B

Take Exit 31B onto Routes 4/225 towards Bedford – Stay in right lane

Use Right Turning Lane (0.3 mile from exit) to access Hartwell Ave. at 1st Traffic Light.

Follow Hartwell Ave. to Wood St. (~1.3 miles).

Turn Left on to Wood Street and Drive for 0.3 of a mile.

Turn Right into MIT Lincoln Lab at the Wood Street Gate

Have a valid driver’s license to present to security.

From Exit 30B

Take Exit 30B on to Route 2A – Stay in right lane

Turn Right on to Mass. Ave (~ 0.4 miles – opposite Minuteman Tech.).

Follow Mass. Ave for ~ 0.4 miles.

Turn Left on to Wood Street and Drive for 1.0 mile.

Turn Left into MIT Lincoln Lab at the Wood Street Gate

Have a valid driver’s license to present to security.

All attendees must present a valid driver’s license to MIT Lincoln Laboratory security. To get to the Cafeteria, proceed toward the Main Entrance of Lincoln Laboratory. Before entering the building, proceed down the stairs located to the left of the Main Entrance. Turn right at the bottom of the stairs and enter the building through the Cafeteria entrance. The Cafeteria is located directly ahead.

To assist us better plan this meeting, please pre-register at:  http://www.ieeeboston.org/Register/.