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  1. Billy J. "BJ" Stanbery - Solar Seminar Series

    High-rate processing and advanced emitter structures for CIGS PV module manufacturing Achieving both macroscopic homogeneity and nanoscale heterogeneity for non-stoichiometric multinary compounds is a critical challenge for the success of copper indium gallium selenide (CIGS) photovoltaic cells.  Co-evaporation yields world record performance, but is also a high-temperature vacuum process that is difficult to scale.  Here, we consider reactive transfer processing (RTP), which has...

  2. Solar Seminar - Kurt R Mikeska

    Crystalline Silicon Solar Cell Metallization Crystalline silicon solar cell technology has advanced by improvements to all aspects of cell design including metallization. Improvements to metal contacts have been synergistic with other cell improvements such as passivation, lightly doped emitters, and boron doped emitters. Recent improvements in metallization contacts have allowed the solar cell industry to move from highly doped emitters (HDE), designed to enable sufficiently low contact...

  3. Integrated Imaging Seminar - Prof. Peyman Milanfar

    Title: Data-adaptive Filtering and the State of the Art in Image Processing Abstract: Recent approaches to processing and restoration of images and video have brought together several powerful data-adaptive methods from different fields of work. Examples include Moving Least Square (from computer graphics), the Bilateral Filter and Anisotropic Diffusion (from computer vision), Boosting and Spectral Methods (from Machine Learning), Non-local Means (from Signal Processing), BregmanIterations...

  4. Integrated Imaging Seminar - Prof. Lawrence Carin

    Title: Coded Aperture Compressive Spectral and Temporal Imaging Abstract:Compressive sensing is a new technology that allows one to acquire data with high information content, based on measurements that are much fewer in number than would be expected by Nyquist theory. This is achieved by leveraging signal models that go beyond signal bandwidth, to exploit the fact that signals of interest typically reside in a low-dimensional subspace. This includes exploitation of concepts like sparsity,...

  5. Suresh V. Garimella - Solar Seminar Series

    Energy Storage – Options and Opportunities   I will briefly review the drivers for renewable and clean energy technologies, and the challenges in the widespread use of renewables.  In particular, I will focus on the need for inexpensive and reliable energy storage approaches if inherently intermittent and transient renewable sources are to gain broad acceptance.  As a specific example, I will tell a story from our group related to thermal energy storage in...

  6. Prof. Stephen A Campbell - Carbon-Based Nanoswitch Logic

    Abstract:The process of shrinking semiconductor devices employed for fifty years has almost reached its end.  Fundamental limitations of the field effect device prevent much additional reduction in the supply voltage.  This leads to unavoidable off-state leakage and very high operating power, an intolerable situation, especially for mobile applications. This is leading to radical changes in the roadmap, forecasting separate technologies for high performance, low operating...

  7. Yi Cui - Solar Seminar Series

    Abstract: Advanced photon management using nanostructures provides exciting opportunities for enhancing solar cell device performance. In this talk, I will present examples of photon management at the nanoscale for amorphous Si, crystalline Si and III-V solar cells while balancing electrical charge carrier collection. Nanocone solar cells are simple structures combing an efficient antireflection and light trapping across a broad band of spectra and over a wide range of incident angles. We...

  8. George Zhao Seminar

    Abstract: Porous materials have found many traditional applications, such as petroleum refining, ion exchange, gas separation and purification, and optoelectronics, benefiting from the highly ordered pore structure and huge specific surface area. Recent emerging applications, such as sustainable energy, water technology, and nanotechnology require advanced porous materials with well-defined structural, interfacial, compositional, and morphological properties. This new paradigm presents...

  9. Solar Seminar Series - Bryan W. Boudouris

    Design of Optoelectronically-active Polymers for Organic Photovoltaic Applications 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 conversion efficiencies even in the highest-performing devices (PCE ~10%). Because the charge generation,...

  10. All User Meeting Slides

    Below is a link for the slides from the 2013 All User Meetings. More InformationSafety SlidesDirector Slides

  11. Professor Roger T. Howe Seminar

    Title: Vacuum Nanosystemsfor Energy Conversion Abstract: Micro and nano-fabricated sensors (e.g., accelerometers and gyroscopes) and actuators (e.g., light valve chips for projection and cell-phone displays) have become commonplace in recent years. Some of these devices must operate in a hermetically sealed, lowpressure ambient, a need that motivated the development of low-cost, wafer-scale vacuum encapsulation technologies. In this talk, I’ll identify a  promising direction for...

  12. XPS Lite Workshop Introduction to CasaXPS

    Course Objectives: -Learn main physics principles of X-ray Photoelectron Spectroscopy (XPS) - Learn what analysis/treatment should be applied to raw XPS data - Learn CasaXPS software - Learn approaches for qualitative and quantitative analysis of XPS data using CasaXPS Case studies based on participant's XPS data Course Description: XPS is widely used to determine the chemical composition of a surface (element concentrations, chemical states, lateral and depth distributions,...

  13. Marcello Ferrera Seminar on Advanced Integrated Photonics

    Marcello Ferrera attained his master degree in micro-electronic engineering in 2005 at University of Palermo (Italy) defending his thesis entitled: "Growth of ferroelectric thin films of barium strontium titanate by pulsed laser deposition and their morphological characterization". This work was developed during a one year internship sponsored by (and performed at) INRS--EMT labs in Canada. During this period, he mastered fundamental techniques for the fabrication and the...

  14. Introduction to XPS workshop - What you should know about X-ray pohotoelectron spectroscopy

    Course Objectives: - Learn physics principles of X-ray Photoelectron Spectroscopy (XPS) -Learn about the analysis of surfaces with XPS and limitations of the technique - Learn approaches for qualitative and quantitative analysis of XPS data -Learn the types of problems that can be solved with XPS:examples - Advanced data analysis: coverage calculation, thin film thickness calculation, etc. Course Description: XPS is widely used to determine the chemical composition of a surface...

  15. Solar Seminar Series - Rakesh Agrawal

    Thin Film Solar Cells from Nanocrystal Inks of Quaternary Chalcogenides The creation of a suitable inorganic colloidal nanocrystal ink for use in a scalable coating process is a key step in the development of low-cost thin film solar cells. We have developed an innovative method of using copper indium gallium disulfide (CIGS) nanocrystals as the building block for the fabrication of bulk CIGSSe thin films. The CIGS nanocrystal ink solution is applied directly on various substrates to form...

  16. Jaime Marian Seminar

    Plastic localization in irradiated ferritic systems: new insights from modeling and simulation Low temperature irradiation of crystalline materials is known to result in hardening and loss of ductility, which limits the usefulness of candidate materials in harsh nuclear environments. In bcc metals, this mechanical property degradation is caused by the interaction of in-grown dislocations with irradiation defects, particularly small dislocation loops resulting from the microstructural...

  17. Dohun Kim Seminar

    Electronic Transport in BisSe3Thin Films in the Topological Insulator Regime The 3D topological insulators (TIs) have an insulating bulk but metallic surface states stemming from band inversion due to strong spin-orbit interaction, whose existence is guaranteed by the topology of the band structure of the insulator. Like graphene, the STI surface state generically has a Dirac electronic spectrum with massless electrons and a vanishing bandgap at a Dirac point. In this talk, I will discuss...

  18. Center fo Scient of Information talks and poster session

    David Tse, UC Berkeley Title:  Optimal Whole Genome Shotgun Assembly: From Simple Models to Complex Data Tuesday, December 04, 2012 1:30 pm - 2:30 pm EST LWSN 1142 Professor Tse will speak on using information theory approaches in DNA sequencing focused on two basic questions: what is the minimum read length and the minimum number of reads required for reliable reconstruction? What is an optimal assembly algorithm that achieves the minimum? He will describe the basis of...

  19. Dr. Tahira Reid Seminar

    Studies on Human Judgments and their Impacts on Engineering Design Decisions Engineers have the unique opportunity to provide design solutions to a variety of problems in our society. However, when it comes to problems that require an understanding of the social or psychological aspects of a solution, we are limited by the traditional engineering paradigm. Colleagues in the social sciences have developed a number of quantitative tools that have proven to be effective in assessing consumer...

  20. Steve Christensen Seminar

    Using an ICME approach for composite materials development in aerospace