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Solar Cells Lecture 5: Organic Photovoltaics
29 Aug 2011 | | Contributor(s):: Muhammad A. Alam
Organic solar cells make use of low-cost organic polymers forphotovoltaics. Although these solar cells may appear to be quitedifferent from solar cells made with conventional, inorganicsemiconductors (e.g. they make use of exciton generation rather than electron-hole generation) this...
Spin Transport and Topological Insulators I
29 Aug 2011 | | Contributor(s):: Supriyo Datta
A major development of the last two decades, the physical and conceptual integration of what used to be two distinct unrelated fields, namely spintronics and magnetics.
Spin Transport and Topological Insulators II
19 Aug 2011 | | Contributor(s):: Supriyo Datta
Lecture 10: Case study-Near-equilibrium Transport in Graphene
19 Aug 2011 | | Contributor(s):: Mark Lundstrom
Near-equilibrium transport in graphene as an example of how to apply the concepts in lectures 1-8.
Solar Cells Lecture 1: Introduction to Photovoltaics
An introduction to solar cells covering the basics of PN junctions, optical absorption, and IV characteristics. Key technology options and economic considers are briefly presented.
Solar Cells Lecture 2: Physics of Crystalline Solar Cells
Solar cell performance is determined by generation and recombination of electron-hole pairs. This tutorial focussing on recombination losses in crystalline silicon solar cells under short-circuit and open-circuit conditions.
Lecture 7: The Boltzmann Transport Equation
17 Aug 2011 | | Contributor(s):: Mark Lundstrom
Semi-classical carrier transport is traditionally described by the Boltzmann Transport Equation (BTE). In this lecture, we present theBTE, show how it is solved, and relate it to the Landauer Approach usedin these lectures
Lecture 9: Introduction to Phonon Transport
This lecture is an introduction to phonon transport. Key similarities and differences between electron and phonon transport are discussed.
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 6: An Introduction to Scattering
In this lecture, we show how the mean-free-path (mfp) is related to thetime between scattering events and briefly discuss how the scattering time is related to underlying physical processes.
Lecture 8: Measurements
A brief introduction to commonly-used techniques, such as van der Pauw and Hall effect measurements.
Tutorial 2: Thermal Transport Across Interfaces - Electrons
16 Aug 2011 | | Contributor(s):: Timothy S Fisher
Outline:Thermal boundary resistanceElectronic transportReal interfaces and measurementsCarbon nanotube interfaces
Tutorial 1: Thermal Transport Across Interfaces - Phonons
15 Aug 2011 | | Contributor(s):: Timothy S Fisher
Outline:Lattice vibrations and phononsThe vibrating stringInterfaces between dissimilar strings: acousticmismatchDiscrete masses and the vibrational eigenspectrumGeneral thermal transport theory
Lecture 2: General Model for Transport
28 Jul 2011 | | Contributor(s):: Mark Lundstrom
Datta's model of a nanodevice is introduced as a general way of describing nanodevices as well, as bulk metals and semiconductors.
Lecture 3: Resistance-Ballistic to Diffusive
The resistance of a ballistic conductor and concepts, such as the quantumcontact resistance, are introduced and discussed. The results are then generalized to treat transport all the way from the ballistic to diffusive regimes.
Lecture 4: Thermoelectric Effects-Physical Approach
The effect of temperature gradients on current flow and how electrical currents produce heat currents are discussed.
Lessons from Nanoelectronics
20 Jul 2011 | | Contributor(s):: Supriyo Datta
Everyone is familiar with the amazing performance of a modern laptop, powered by a billion-plus nanotransistors, each having an active region that is barely a few hundred atoms long. What is not as appreciated is the deeper understanding of current flow, energy exchange and device operation that...
Lessons from Nanoelectronics (Q&A)
Q&A session from Lessons from Nanoelectronics.
2011 NCN Summer School: Welcome and Introduction
20 Jul 2011 | | Contributor(s):: Mark Lundstrom
Lecture 1: Introduction to Near-equilibrium Transport
A short overview of the topics to be discussed in the following nine lectures in this short course on near-equilibrium transport.