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Epitaxial Strategies for High Power Optically Pumped Vertical External Cavity Surface Emitting Lasers and Metamorphic Antimonide Solar Cells
05 Dec 2016 | | Contributor(s):: Ganesh Balakrishnan
We present antimonide-based photovoltaic cells grown on GaAs and Silicon substrates for use as sub-cells in metamorphic multi-junction solar cells. These antimonide cells, based on GaSb, are designed to absorb near-infrared photons. The GaSb layer is grown on either GaAs or Silicon substrates.
A Crash Course in Nanophotonic Simulations
18 Jun 2015 | | Contributor(s):: Peter Bermel
This seminar will cover rapid, scalable computational methods used in simulating optical reflection,transmission, and absorption in complex structures. After a brief survey of the tools available, the S4 simulation tool will be demonstrated in detail.
Failures in Photovoltaic Modules
21 Apr 2015 | | Contributor(s):: Peter Bermel
In this talk, I will discuss some of the major sources of performance degradation for common glass-encapsulated PV modules, including crystalline silicon and thin films. The greatest reliability challenges have occurred in the latter, with recent studies showing that thin-film modules operating...
Design of Optoelectronically-active Polymers for Organic Photovoltaic Applications
08 Feb 2013 | | Contributor(s):: Bryan W. Boudouris
Organic photovoltaic (OPV) devices are of great interest due to their promise of providing flexible, lightweight, and inexpensive alternatives to their currently-used inorganic counterparts. However, large-scale implementation of these modules has been hampered due to their relatively low power...
Economic Factors on the Modern Photovoltaic Market
16 Sep 2011 | | Contributor(s):: Gregory T. Forcherio
Photovoltaic research is heavily driven by market demand and "green-energy" hopes of the future. Commercial and utility level thin film photovoltaic systems have almost reached grid parity worldwide, but the residential market, mainly comprised of crystalline and polycrystalline...
Optimum Morphology and Performance Gains of Organic Solar Cells
09 Sep 2011 | | Contributor(s):: Biswajit ray, Muhammad Alam
Morphology of light absorbing layer is known to dictate the power conversion efficiency of organic photovoltaic (OPV) cell. The innovation of bulk heterojunction (BHJ) led to significant improvement for exciton harvesting, but carrier recombination at the distributed interfaces and variability...
Solar Cells Lecture 4: What is Different about Thin-Film Solar Cells?
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.
Solar Cells Lecture 5: Organic Photovoltaics
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...
Solar Cells Lecture 1: Introduction to Photovoltaics
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.
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.
A Physical Model for Non-Ohmic Shunt Conduction and Metastability in Amorphous Silicon Solar Cells
16 Aug 2011 | | Contributor(s):: Sourabh Dongaonkar, Souvik Mahapatra, Karthik Yogendra, Muhammad Alam
In this talk we develop a coherent physics based understanding of the shunt leakage problem in a-Si:H cells, and discuss its implications on cell and module level.Sourabh Dongaonkar is with School of Electrical and Computer Engineering, Purdue University, West Lafayette, INKarthik Y and Souvik...
Solar Cells Lecture 3: Modeling and Simulation of Photovoltaic Devices and Systems
20 Jul 2011 | | Contributor(s):: J. L. Gray
Modeling and simulation play an important role in designing and optimizing PV systems. This tutorial is a broad overview of the topic including a look at detailed, numerical device simulation.
NanoDays - Artificial Photosynthesis with Biomimetic Nanomaterials: Self-Repairing Solar Cells
05 May 2011 | | Contributor(s):: Jong Hyun Choi
OPV: Synthesis and Nanostructure Control of All-conjugated Diblock Copolymers for the Application of Organic Electronic Devices
31 Jan 2011 | | Contributor(s):: Yue Zhang
This presentation was part of the "Organic Photovoltaics: Experiment andTheory" workshop at the 2010 Users' Meeting of the Molecular Foundry andthe National Center for Electron Microscopy, both DOE-funded ResearchCenters at Lawrence Berkeley National Laboratory.
OPV: Conjugated Polymer Design and Chemistry for Organic Photovoltaics
31 Jan 2011 | | Contributor(s):: Claire H Woo
This presentation was part of the "Organic Photovoltaics: Experiment and Theory" workshop at the 2010 Users' Meeting of the Molecular Foundry and the National Center for Electron Microscopy, both DOE-funded Research Centers at Lawrence Berkeley National Laboratory.
OPV: Morphology and Interfaces in Organic Photovoltaics
31 Jan 2011 | | Contributor(s):: Michael Chabinyc
OPV: Time Domain Ab Initio Studies of Organic-Inorganic Composites for Solar Cells
31 Jan 2011 | | Contributor(s):: Oleg Prezhdo
OPV: First Principles Studies of the Electronic Structure of Organic Solids and Interfaces
31 Jan 2011 | | Contributor(s):: Sahar Sharifzadeh
OPV: Large Scale Ab Initio Simulation for Charge Transport in Disordered Organic Systems
31 Jan 2011 | | Contributor(s):: Lin-Wang Wang
OPV: Untangling the Essence of Bulk Heterostructure Organic Solar Cells: Why the Complex Need not be Complicated
31 Jan 2011 | | Contributor(s):: Muhammad Alam