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Radoslav Borisov
https://nanohub.org/members/57617
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Solar Cells Lecture 4: What is Different about Thin-Film Solar Cells?
Online Presentations | 29 Aug 2011 | Contributor(s):: Muhammad A. Alam
Thin film solar cells promise acceptable efficiency at low cost. This tutorial examines the device physics of thin-film solar cells, which generally require a different type of analysis than crystalline solar cells.
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Solar Cells Lecture 5: Organic Photovoltaics
Online Presentations | 29 Aug 2011 | Contributor(s):: Muhammad A. Alam
Organic solar cells make use of low-cost organic polymers for photovoltaics. Although these solar cells may appear to be quite different from solar cells made with conventional, inorganic semiconductors (e.g. they make use of exciton generation rather than electron-hole generation) this tutorial...
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Spin Transport and Topological Insulators I
Online Presentations | 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.
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Thermal Transport Across Interfaces
Courses | 23 Aug 2011 | Contributor(s):: Timothy S Fisher
These lectures provide a theoretical development of the transport of thermal energy by conduction in nanomaterials, in which material interfaces typically dominate transport. The physical nature of energy transport by two carriers: electrons and phonons--will be explored.
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Spin Transport and Topological Insulators II
Online Presentations | 19 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.
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Lecture 10: Case study-Near-equilibrium Transport in Graphene
Online Presentations | 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.
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Solar Cell Fundamentals
Courses | 19 Aug 2011 | Contributor(s):: Mark Lundstrom, J. L. Gray, Muhammad A. Alam
A new version of the course has been posted here. The modern solar cell was invented at Bell Labs in 1954 and is currently receiving renewed attention as a potential contribution to addressing the world's energy challenge. This set of five tutorials is an introduction to solar...
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Solar Cells Lecture 1: Introduction to Photovoltaics
Online Presentations | 19 Aug 2011 | Contributor(s):: Mark Lundstrom
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.
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Solar Cells Lecture 2: Physics of Crystalline Solar Cells
Online Presentations | 19 Aug 2011 | Contributor(s):: Mark Lundstrom
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.
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Lecture 7: The Boltzmann Transport Equation
Online Presentations | 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
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Lecture 9: Introduction to Phonon Transport
Online Presentations | 17 Aug 2011 | Contributor(s):: Mark Lundstrom
This lecture is an introduction to phonon transport. Key similarities and differences between electron and phonon transport are discussed.
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Lecture 5: Thermoelectric Effects - Mathematics
Online Presentations | 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.
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Lecture 6: An Introduction to Scattering
Online Presentations | 16 Aug 2011 | Contributor(s):: Mark Lundstrom
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.
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Lecture 8: Measurements
Online Presentations | 16 Aug 2011 | Contributor(s):: Mark Lundstrom
A brief introduction to commonly-used techniques, such as van der Pauw and Hall effect measurements.
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Tutorial 2: Thermal Transport Across Interfaces - Electrons
Online Presentations | 16 Aug 2011 | Contributor(s):: Timothy S Fisher
Outline:Thermal boundary resistanceElectronic transportReal interfaces and measurementsCarbon nanotube interfaces
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Tutorial 1: Thermal Transport Across Interfaces - Phonons
Online Presentations | 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
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Lecture 2: General Model for Transport
Online Presentations | 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.
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Lecture 3: Resistance-Ballistic to Diffusive
Online Presentations | 28 Jul 2011 | Contributor(s):: Mark Lundstrom
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.
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Lecture 4: Thermoelectric Effects-Physical Approach
Online Presentations | 28 Jul 2011 | Contributor(s):: Mark Lundstrom
The effect of temperature gradients on current flow and how electrical currents produce heat currents are discussed.