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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.
Diffusion-Reaction Modeling of Cu Migration in CdTe Solar Devices
22 Apr 2016 | | Contributor(s):: Da GUO, Tian Fang, Richard Akis, Dragica Vasileska
IWCE 2015 presentation. In this work, we report on development of one-dimensional (1D) finite-difference and two- dimensional (2D) finite-element diffusion-reaction simulators to investigate mechanisms behind Cu- related metastabilities observed in CdTe solar cells . The evolution of CdTe...
Thermionic Escape in Quantum Well Solar Cell
18 Dec 2015 | | Contributor(s):: Nicolas Cavassilas, Fabienne Michelini, Marc Bescond
This theoretical work analyzes the photogeneration and the escape of carrier in InGaN/GaN core-shell nanowires. Our electronic transport model considers quantum behaviors such as confinement, tunneling, electron-phonon scattering and electron-photon interactions. The large lattice mismatch...
Simulation of Organic Solar Cell with Graphene Transparent Electrode
13 Nov 2015 | | Contributor(s):: Paolo Paletti, giacomo ulisse, Giuseppe Iannaccone, Gianluca Fiori
IWCE 2015 presentation. We present a simulation study of the performance of organic solar cell (OSC) exploiting graphene as transparent electrode. The approach is based on a multi-scale/multi-physics simulation framework, which is able to provide relevant information regarding the design...
A Multi-Scale Modeling Approach to Study Transport in Silicon Heterojunction Solar Cells
03 Nov 2015 | | Contributor(s):: Pradyumna Muralidharan, Dragica Vasileska, Stephen M. Goodnick, Stuart Bowden
IWCE 2015 presentation. Abstract and more information to be added at a later date.
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...
[Illinois] AVS Meeting 2012: Understanding Atomic-Layer-Deposition Synthesis of Cu 2 ZnSnS 4 Solar Cells
04 Jun 2013 | | Contributor(s):: Sergey V. Baryshev
Cu2ZnSnS4 (CZTS) has recently attracted attention as a light absorber for photovoltaic applications because of its band gap (εg≈1.4 eV), the relative abundance and low cost of its constituent elements (which permits large-scale low-cost module production), and its demonstrated...
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...
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...
Opportunities of Lasers for Scalable Manufacturing of Solar Energy Devices
21 Aug 2012 | | Contributor(s):: Gary Cheng
Production costs, module conversion efficiencies, and adoption in commercial rooftops continue to be the most critical issues for solar energy technology.The industry continuously seeks technologies that offer scalable and high speed solar device production to replace costly conventional...
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