Chair: Dr. Kris Verma - SVTI
J. Campbell Scott
The deployment of solar energy systems based on photovoltaic cells is accelerating as the cost approaches “grid parity.” The primary technology remains first-generation cells of crystalline silicon, but second-generation, thin-film technology is rapidly entering the market. Many corporations and academic institutions world-wide are exploring ways to improve solar cell performance and/or lower the cost relative to second generation technology. The approaches under investigation range from solution processing of thin-film structures, to nano-structured materials, to tandem, multi-junction cells in combination with solar concentrators. More efficient use of the solar spectrum may be enabled by multi-exciton generation, carrier multiplication, down-conversion of UV photons, and up-conversion of mid-IR photons. This talk will summarize progress in these advanced technologies, including examples of projects in the IBM Research Division.
About J. Campbell Scott
J. Campbell Scott received his BSc in physics from St. Andrews University in Scotland and his PhD from the University of Pennsylvania where he was a Thouron Fellow. He was an Assistant Professor of Physics at Cornell University before joining the IBM San Jose Research Laboratory (now the Almaden Research Center) as a Research Staff Member. At Almaden he has managed R&D groups in printing, display, and memory technologies.
Over the course of his research career he has applied a wide variety of experimental techniques to the understanding of electronic, magnetic, optical and thermal properties of both organic and inorganic materials. Among the classes of materials studied are: highly conducting charge transfer complexes, organic superconductors, conducting polymers, liquid crystals, molecularly doped polymers, photoconductors, photorefractive polymers, electroluminescent materials, thin magnetic metal films, and nanoparticles. Dr. Scott has experience in applying his knowledge of physics, materials science, chemistry and processing to the science and technology of laser printing, magnetic data storage, organic light-emitting diode displays, nonvolatile memory and molecular electronics. He has served as a consultant to a bio-assay start-up company. His current research program is directed at the fabrication, evaluation and optimization of nano-structured solar cells.
He has published more than 160 articles and holds 16 patents. Dr. Scott is a Fellow of the American Physical Society and a member of the Materials Research Society. For amusement and relaxation, he windsurfs, plays golf, squash and bridge, dances and listens to music.
We have developed methods for making high efficiency Cz-Si wafer based solar cells using Innovalight’s proprietary Silicon Ink technology. Our approach uses n-type Silicon Ink, a phosphorous doped silicon nanoparticle colloidal dispersion and industrial printing systems, to form high efficiency emitters on p-type silicon wafer absorbers. The cell fabrication approach utilizes the same tools and materials used in a standard screen printed solar cell manufacturing line with only one additional tool, a printing system, which is used to deposit and dry the n-type Silicon Ink. This simple process improves the efficiency of standard screen printed solar cells by about 1% absolute with minimal impact on manufacturing cost.
About Homer Antoniadis:
Dr. Homer Antoniadis is the CTO & VP of Engineering in Innovalight, Inc. where he is heading the development of high efficiency silicon-ink processed solar cells. His 20 year career includes Osram Opto Semiconductors, Hewlett-Packard Labs and Xerox and brings a diverse background of technical leadership and experience in photovoltaics and other areas of high-throughput, low-cost, optoelectronic applications. At Osram he led the product development efforts from R&D to production for a variety of OLED displays and solid state lighting systems.
Dr. Antoniadis has over 50 publications in crystalline and amorphous silicon photovoltaics, OLEDs, polymer materials and has 22 issued US patents. He earned his PhD and MS in Physics from Syracuse University and a BS in Physics from Ioannina University, Greece.
Crystalline photovoltaic solar cells have made considerable progress over the last few years, increasing in efficiency and decreasing in cost. The cells usually contain a planar junction, and possibly a roughened surface. A basic trade-off with this two-dimensional structure is the inherent coupling of the light absorbing thickness and the carrier collection distance, which limits the use of lower-cost, lower-quality semiconductors. If a material with a shorter diffusion length is used, the absorbing thickness must be decreased or many of the generated electron-hole pairs recombine, rather than being collected. “Nanowire” structures allow the absorbing distance and the carrier collection distance to be decoupled. A long absorbing distance can be used to absorb the maximum amount of light, while the distance that the minority carriers must travel to be collected can be short. In addition, a nanowire array inherently scatters incoming light many times, decreasing the amount of light reflected from the structure without additional complex processing. The nanowire array also allows flexibility in the final device structure, as well as the possibility of stacking multiple nanowire arrays of different semiconductors to collect different portions of the solar spectrum. This presentation will describe the basic idea of the nanowire solar cell, the benefits and limitations, and a few of the solar cell structures possible.
About Ted Kamins
Ted Kamins is a Consulting Professor in the Electrical Engineering Department at Stanford University, where is guiding research on epitaxial Si and Ge deposition and other advanced semiconductor processing. Ted received his degrees from the University of California, Berkeley. He then joined the Research and Development Laboratory of Fairchild Semiconductor, where he worked with epitaxial and polycrystalline silicon before moving to Hewlett-Packard Laboratories, where he worked on numerous semiconductor material and device topics. Most recently at Hewlett-Packard, he was a Principal Scientist in the Information and Quantum Systems Laboratory, where he conducted research on advanced nanostructured electronic and sensing materials and devices.
Ted is co-author with R. S. Muller of the textbook "Device Electronics for Integrated Circuits" and is author of the book "Polycrystalline Silicon for Integrated Circuits and Displays." He is a Fellow of the IEEE and a Fellow of the Electrochemical Society. He has taught at the University of California, Berkeley, and at Stanford University and has been an Associate Editor of the IEEE Transactions on Electron Devices.
Technology Session 1
Chair: Dr. KRS Murthy
Nelson L A Braga
The photovoltaic industry is undergoing a transformational evolution as it expands production capacity and deployments to meet the growing need for green alternative sources of electricity production. Two of the primary drivers for the industry are the reduction in the cost of the solar cells and modules, and the improvement of the performance, particularly the conversion efficiency. To meet these challenges, new materials, manufacturing technologies and cell designs are being investigated. To support this development, simulation provides key insights into the physics of solar cell operation, enabling engineers to fully explore the range of design alternatives. At the module and system level, behavioral models allow engineers to examine design trade-offs which impact system performance. This talk reviews the current status of simulation in the development of photovoltaic technologies, from solar cell design to system performance, and provides an outlook for future work.
SEMI PV Group
As favorable policies in key markets worldwide are put in place and the general public slowly embraces clean energy sources as alternatives to fossil fuels, the global PV industry continues to gain momentum as one of the most promising alternative energy sectors of the future. Challenges remain, however, with respect to strengthening the manufacturing supply chain, addressing the industry’s growing pains and finding meaningful ways of collaborating to drive down cost and accelerate deployment of solar energy.
SEMI, the global industry association representing the broader microelectronics supply chain, sees both the need and the opportunity that PV presents for its member companies and the PV industry at large. This presentation will describe the formation of SEMI’s PV Group, its mission and objectives as well as current and planned initiatives in areas such as
in the context of regional and global partnerships with governments, industry segments, and other organizations.
About Bettina Weiss
Bettina joined the SEMI organization in January 1996 in the SEMI Europe office in Brussels, Belgium as Standards Coordinator and transferred to SEMI Headquarters in the US in spring of 1997 where she worked in several Standards-related positions. From November 2003 to March 2008, she served as Director, International Standards as chief staff of the SEMI International Standards Program. Since April 1, 2008, she has been responsible for coordinating all initiatives and activities in SEMI’s photovoltaic segment PV Group globally, including public policy, market intelligence, industry collaboration and strategic partnerships.
Prior to joining SEMI, Bettina worked in marketing and sales positions at Metron Technology and Varian Semiconductors in Munich, Germany.
Technology Session 2
Chair: Pallab Chaterjee
This talk reviews the present status and possible future developments of photovoltaic (PV) materials and technology for terrestrial applications. After a brief introduction of the photovoltaic effect theoretical requirements for the optimal performance of materials for pn-junction solar cells are discussed. Most important are efficiency, long-term stability and, not to be neglected, lowest possible cost. The physical and technical limitations of this material are discussed. Practically all photovoltaic devices incorporate a pn-junction in a semiconductor across which the photovoltage is developed. These devices are also known as solar cells. This seminar will introduce you to current solar cell technologies that are based on nanotechnology. In particular, traditional silicon-based solar cells are described and compared with more current nanocrystalline solar cells. Four types of nanotechnology based solar cells will be discussed. These include: Nano-crystalline TiO2 Dye-Sensitized Solar-Cells, Quantum dot solar cells, Nanowire solar cells, and Hybrid cells. Who may commercialize these, by when, and what major problems stand in the way will also be discussed. In the future other materials and concepts can be expected to come into play. Some of these are: dye sensitized cells, organic solar cells and various concentrating systems including III/V-tandem cells. Theoretical nano-materials and nanotechnology-enabled high efficiency solar cell that have not yet been realized will be discussed.
About Jeongwon Park
Jeongwon Park received his Ph.D. from University of California, San Diego in the Materials Science and Engineering Program in 2008. Since 2008, he has been with Applied Materials where he currently is doing research on epitaxial growth in the Front End Product Group. He has been a guest researcher at NASA Ames Research Center, Lawrence Berkeley National Labs(LBNL), and Sun Microsystems, in addition to his work at UCSD, Hanyang University, Institute for Advanced Engineering, and Seoul National University in Korea. He is an adjunct faculty member in Electrical Engineering at Santa Clara University. He has been teaching “Fundamentals of Semiconductor Physics”, “Nanoelectronics”, and “Nanotechnology” for graduate students and engineering management students at Santa Clara University as an adjunct professor. He also taught as a guest lecturer in three courses at Santa Clara University.: Introduction to Nanotechnology, Nanomaterials, and Nanoscale Science and Technology. He has published more than twenty papers.
This presentation will cover industry application, technology, incentive and regional trends from 1974 to 2009 to focus on the continuing development of this still-young industry. Regional, technology and price forecasts through 2015 will be presented along with a discussion of industry direction.
About Paula Mints
Ms. Mints is the Principal Analyst for the PV Service Market Research Program, and an Associate Director located at Navigant Consulting, Inc.’s Palo Alto, CA, office. Ms. Mints also serves as executive editor of the Solar Outlook Bimonthly Newsletter and the Concentrating Solar Quarterly Newsletter. The PV Service Market Research program is an 35 year old, globally recognized market research practice.
Ms. Mints is widely recognized as an industry expert on photovoltaic (PV) technologies and markets. She provides NCI clients with objective, comprehensive PV industry analysis based on extensive primary research, including her forward-looking understanding of market and technology trends.
Products & Applications
Chair: Dr. William Kao
In his talk Michael Cung will discuss the following:
· Solar Project Development, from search for the project to find the right partner to pass the inspection and Interconnection.
· Solar Project Finance, from beginning to the funding process.
· Investors from Wall Street, Local Banks, Insurance Companies and Asia.
· Logistics side of Solar Project Development
· Factoring for Solar component
About Michael Cung
Michael Cung is CEO and a Co-Founder of King-Solarman LLC. He worked for 6 years as Real Estate Banker in Deutsche Bank, was a top originator and the President Club’s member for a few years, and worked with real estate developers, real estate investors, mortgage brokers, mortgage bankers in New York City and San Francisco Bay Area. He was an investment accountant in JP Morgan Asset Management and Citibank headquarter. He graduated from Baruch College in New York City, BBA in Accounting.
This talk will cover the following issues:
About Kevin Gao
Kevin Gao founded CA Solar LLC in Silicon Valley. He has nearly 20 Years of experience in sales & marketing, strategic M&A, manufacturing & operation management, local sourcing & global sourcing, engineering R&D in solar, semiconductor equipment and automotive industries. Prior to founding CA Solar LLC, Kevin was Director of Manufacturing at Electroglas, Inc. - a Nasdaq listed semiconductor equipment company located in San Jose, California - reported to Chairman, CEO, and COO of company. He was responsible for managing manufacturing operation team in US, Singapore and China. Previously he was Senior Manager at Foxsemicon Integrated Technology Inc, a Foxconn company, was responsible for business development, M&A, supply chain & logistics management for its US operation. Kevin also spent over 10 years in engineering R&D. He worked as a senior engineer at Lam Research Corporation, a leading semiconductor equipment company, developed its flagship wafer etch product that took over the leadership position from its biggest competitor Applied Materials. He also worked at Dana Corporation and Rockwell International Corporation in developing clutches and axles in automotive industries. Kevin holds Master's of Mechanical Engineering degree from University of Cincinnati; attended MBA program at California State University. Kevin Holds three US patents, and one patent in Europe and Brazil.