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HEATER Seminar Series: Ali Shakouri, Purdue University

Nanoscale thermal transport and thermoelectric energy conversion
When Mar 14, 2014
from 10:10 AM to 11:00 AM
Where BA B024, Bahen Centre, 40 St. George St
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Ali Shakouri

Birck Nanotechnology Center

Purdue University, West Lafayette, IN

Energy consumption in our society is increasing rapidly. A significant fraction of the energy is lost in the form of heat. In this talk we introduce thermoelectric devices that allow direct conversion of heat into electricity. Novel metal-semiconductor nanocomposites are developed where the heat and charge transport are modified at the atomic level [1]. Potential to increase the energy conversion efficiency and bring the cost down to $0.1-0.2/W will be discussed. We then focus on nanoscale thermal and thermoelectric transport. Full field transient thermal imaging with submicron spatial and 800ps time resolution is used to study ultrafast Peltier cooling and Joule heating. Finally, we describe some of the recent studies of ballistic heat conduction. We show that non-Fourier diffusion equation can better describe heat propagation in submicron semiconductor alloys. This has important implications in the design of high power and high speed electronic and optoelectronic devices.

 

[1] Thermoelectricity: from Atoms to Systems (https://nanohub.org/courses/TEAS) a nanoHUB-U course.

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Ali Shakouri is the Mary Jo and Robert L. Kirk Director of the Birck Nanotechnology Center and a Professor of Electrical and Computer Engineering at Purdue University. He received his Engineering degree from Telecom Paris, France in 1990 and Ph.D. from California Institute of Technology in 1995. His current research is on nanoscale heat and current transport in semiconductor devices, high resolution thermal imaging and waste heat recovery systems. He is also working on a new interdisciplinary sustainability curriculum in collaboration with colleagues in engineering and social sciences. He received the Packard Fellowship in Science and Engineering in 1999 and the NSF Career award in 2000.

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