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Low Temperature Enhancement of the Thermoelectric Seebeck Coefficient in Semiconductor Nanoribbons
09 Nov 2016 | | Contributor(s):: Kommini Adithya, Zlatan Aksamija
IWCE 2015 Presentation. We propose a novel approach to achieving a narrow window-shaped TDF through a combination of a step-like 2-dimensional density-of-states (DOS) and inelastic optical phonon scattering. A shift in the onset of scattering with respect to the step-like DOS creates a TDF which...
Ultra-Thin Silicon Membranes and Nanowires as Nanophononic and Thermoelectric Devices
10 Feb 2016 | | Contributor(s):: Davide Donadio
IWCE 2015 presentation. Engineering silicon at the nanoscale paves the way to new applications of this cheap, abundant, and technologically and environmentally friendly material. Transistors in nanoelectronics have reached the 10 nm size limit, implying very high density but also critical issues...
[Illinois] Nano EP Series: Thermoelectrics of Roughened Silicon Nanowire Arrays
12 Dec 2012 | | Contributor(s):: Jyothi Sadhu
"Thermoelectrics of Roughened Silicon Nanowire Arrays"The possibility of using silicon as a thermoelectric material for waste heat recovery is technologically significant due to silicon's economy of scale and vast processing knowhow. Patterning silicon as nanowires with roughened sidewalls is...
[Illinois] Nano EP Seminar Series: Thin-Film Nanocalorimetry of Lamellar Silver Alkanethiolate Crystals
26 Nov 2012 | | Contributor(s):: Lito de la Rama
"Thin-Film Nanocalorimetry of Lamellar Silver Alkanethiolate Crystals"Materials exhibit unique thermodynamic properties at the nanoscale.The study of size-dependent phenomena is critical in our understanding of nanoscale systems.We have developed an ultra-sensitive, fast-scanning thin film...
Nano Solutions to Our Impending Energy Crisis
17 Nov 2012 | | Contributor(s):: Ali Shakouri
In this talk we review some of the advances in nanoscale energy conversion devices and discuss about the challenges and opportunities to provide a clean energy infrastructure. Couple of examples from solar and thermoelectric materials, devices and systems will be given and the scale of the...
Dynmical Models for Thermopower
19 Apr 2012 | | Contributor(s):: Giulio Casati
Dynamical nonlinear systems provide a new approach to the old problem of increasing the efficiency of thermoelectric machines. Here we discuss stylized models of classical dynamics, including non interacting complex molecules in an ergodic billiard, a disordered hardpoint gas and systems with...
ECE 656 Lecture 41: Transport in a Nutshell
21 Feb 2012 | | Contributor(s):: Mark Lundstrom
ECE 656 Lecture 10: Thermoelectric Effects - (Electronic) Heat Flow
26 Sep 2011 | | Contributor(s):: Mark Lundstrom
Outline:IntroductionHeat transport by current flowMathematical formulationDiscussionSummary
ECE 656 Lecture 9: Thermoelectric Effects - Charge Flow
23 Sep 2011 | | Contributor(s):: Mark Lundstrom
Outline:IntroductionCharge transport in a temperature gradientMathematical formulationDiscussionSummary
Lecture 5: Thermoelectric Effects - Mathematics
16 Aug 2011 | | Contributor(s):: Mark Lundstrom
Beginning with the general model for transport, we mathematically deriveexpressions for the four thermoelectric transport coefficients:(i) Electrical conductivity,(ii) Seebeck coefficient (or "thermopower"),(iii) Peltier coefficient,(iv) Electronic heat conductivity.
Lecture 4: Thermoelectric Effects-Physical Approach
28 Jul 2011 | | Contributor(s):: Mark Lundstrom
The effect of temperature gradients on current flow and how electrical currents produce heat currents are discussed.
27 Jul 2010 | | Contributor(s):: Mark Lundstrom
his talk is an undergraduate level introduction to the field. After a brief discussion of applications, the physics of the Peltier effect is described, and the Figure of Merit (FOM), ZT, which controls the efficiency of a thermoelectric refrigerator or electric power generator, is discussed. The...
Thermal Transport in Nanostructured Materials: Working to Improve Efficiency in the Field of Thermoelectrics
08 Jul 2010 | | Contributor(s):: Suzanne Singer
This talk discusses the performance of nanostructured thin films as a potentialmaterial for thermoelectric energy conversion applications, as well as thematerial composition variations that can provide guidelines for finding lowvalues of thermal conductivity.
Illinois ME 498 Introduction of Nano Science and Technology, Lecture 10: Thermal and Electric Conduction in Nanostructures
07 Oct 2009 | | Contributor(s):: Nick Fang, Omar N Sobh
Thermal and Electric Conduction in NanostructuresTopics: Back to Constitutive Equations Coupled Heat and Electron Conduction Thermoelectric Cooling Principle of Thermoelectric Effect Comparison of Different Materials Challenges in Efficiency Nanoscale Thermoelectricity
Illinois ME 498 Introduction of Nano Science and Technology, Lecture 9: Thermal and Electric Conduction in Nanostructures
Thermal and Electric Conduction in NanostructuresTopics: Quantum Fracture Mechanics Magneto-restrictive Effect Shape Memory Effect Thermal Noise in Resonators Back to Constitutive Equations Look Into the Conducting Nanowires Boltzmann Transport Equation
ECE 656 Lecture 15: Solving the BTE - General Solution for B = 0
06 Oct 2009 | | Contributor(s):: Mark Lundstrom
General solution 2) Current equation 3) Coupled current equations 4) The RTA 5) Summary
ECE 656 Lecture 8: Thermoelectric Effects
27 Sep 2009 | | Contributor(s):: Mark Lundstrom
Outline:IntroductionOne energy level formulationDistribution of energy levelsDiscussionSummary
Nanoscale Opto Thermo Electric Energy Conversion Devices
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28 May 2008 | | Contributor(s):: Ali Shakouri
We review solid-state devices that allow direct conversion of heat into electricity. We describe fundamental and practical limits of conventional thermoelectric materials. Novel metal-semiconductor nanocomposites are developed where the heat and charge transport are modified at the atomic level....
The Potential of Nanostructured Materials to Address the Challenge of a Sustainable Energy Resource
14 Feb 2008 | | Contributor(s):: Mildred S. Dresselhaus
An overview is presented on the grand challenges to the science community in the next few decades in meeting global energy needs for the 21st century. Major advances in our present capabilities will be needed for energy production and storage and for its conversion from one form to another....