Optics for Solar Energy (SOLAR)

02 November 2015 – 05 November 2015 Soochow University Dushu Lake Campus, Suzhou, China

The progress in solar energy has been driven by the fields of optics, solid-state physics, thermal science, materials and chemistry. They play a key role in the development of present and future solar energy technologies. Optical elements are used for collecting, guiding, concentrating, coupling, trapping, transforming and absorbing the light in solar energy systems.

The Optics for Solar Energy (SOLAR) Conference focuses on optical science and its applications to solar energy conversion, mainly in the areas of solar thermal, concentrating photovoltaics and new-type solar cell such as perovskite solar cell, two dimensional semiconductor devices, organic solar cell, nano-structured semiconductor solar cell and so on, but not limited on the above mentioned novel type SOLAR technology. All these areas are experiencing rapid progress, which strongly relies on the advances in efficiency, cost, and reliability of their optical elements. Fundamental and applied concepts are addressed at the conference and they include the design, modeling, optimization, integration, experimental evaluation, manufacturability, reliability, and techno-economics of solar energy systems, as well as the use of novel materials in all aspects of such systems.

This conference has attracted professionals and scientists from many different scientific and industrial areas, creating a multidisciplinary arena to discuss technical challenges beyond the state-of-the-art. Optical scientists, physicists, engineers and industry managers are brought together to discuss the most novel developments in the field with the aim of improving the competitiveness of solar energy.

  1. Advances in concentrator optics
    1. Non-imaging optics for CPV and solar thermal applications
    2. Materials, coatings and manufacturing processes
  2. Novel CPV architectures
    1. thin- and micro-lens arrays, microsystems-enabled PV
    2. tracking-integrated concentrators
    3. spectral splitting
    4. fluorescent and holographic concentrators
    5. light-guide concentrators
  3. Concentrating solar power:
    1. advances in collector, receiver, absorber, and storage technologies
    2. plant integration
  4. Solar chemistry:
    1. novel processes for solar fuels and commodities
    2. advances in reactive materials
    3. advances in reactor technologies
    4. optical methods for reactive system characterization
  5. Light-guide systems for solar energy applications
    1. photovoltaics
    2. illumination
    3. thermal
    4. laser pumping
  6. Optical modelling of solar energy systems
    1. physical optics
    2. ray optics
    3. multi-scale modeling
  7. Characterization of solar concentrators and systems:
                a. optical tools
                b. solar simulators
                c. outdoor characterization
                d. atmospheric scattering measurements
  1. Degradation and soiling effects on solar concentrators
               a. degradation of reflector elements
               b. dust deposition, cleaning methods
  1. Field performance/benchmarking of CPV/CSP systems
  2. Reliability of concentrator optics
  3. Lifecycle and techno-economic analyses of CPV/solar thermal systems
  4. Standardization and qualification
           a. definition of standards
           b. definition of standardized qualification methods
  1. Public policy issues
Manuel Blanco, Commonwealth Sci and Indus Res OrgAustralia, Invited

Yi-Bing Cheng, Monash UniversityAustralia, Invited

Zhikuan Cheng, Nanjing University of TechnologyChina, Invited

Silke Christiansen, Germany, Invited

Yanjun Dai, Shanghai Jiao Tong UniversityChina, Invited

Xinjiang Feng, Suzhou Institute Nano-Tech and Nano-Bionics, Chinese Academy of SciencesChina, Invited

Baohua Jia, Swinburne University of TechnologyAustralia, Invited

Liang Li, Soochow UniversityChina, Invited

Meicheng Li, North China Electric Power UniversityChina, Invited

Xiaofeng Li, Soochow UniversityChina, Invited

Keith Lovegrove, IT PowerAustralia, Invited

Zhijun Ning, Shanghai Tech UniversityChina, Invited

Ioannis Papakonstantinou, University College LondonUnited Kingdom, Invited

David Pui, University of Minnesota MinneapolisUnited States, Invited

Guozhen Shen, Insititute of Semiconductor, CASChina, Invited

Hajime Shirai, Saitama UniversityJapan, Invited

Yong Shuai, Harbin Institute of TechnologyChina, Invited

Jianpu Wang, Nanjing University of TechnologyChina, Invited

Jichun Ye, NIMTE, the Chinese Acad Sci (CAS)China, Invited

Tierui Zhang, Chinese Acad of Sci Inst of Physics LibChina, Invited

Hongwei Zhu, Tsinghua UniversityChina, Invited
Program Chairs 
Reiner Buck, German Aerospace Center, Germany
Wojciech Lipinski, The Australian National University, Australia
Baoquan Sun, Soochow University, China

Committee Members
César Domínguez, Universidad Politecnica de Madrid, Spain
Abraham Kribus, Tel-Aviv University, Israel
Xiaofeng Li, Soochow University, China
Peter Nitz, Fraunhofer Inst Solar Energy Systems, Germany
Akiba Segal, Weizmann Institute of Science, Israel
Satoshi Wada, RIKEN, Japan
Jianpu Wang, Nanjing University of Technology, China
Roland Winston, University of California Merced, United States
Yong-Hang Zhang, Arizona State University, United States
Li Zhu, Tianjin University, China

Plenary Session

Sune Svanberg,Atomic Physics Division, Department of Physics, Lund University, Sweden and South China Normal University, Guangzhou, China

Laser Spectroscopy Applied to Environmental, Ecological and Medical Research
Laser spectroscopy provides many possibilities for multi-disciplinary applications in environmental monitoring, in the ecological field, and in medicine. The talk will give a large number of examples ranging from air pollution monitoring by lidar techniques, compact multiple scattering ceramic multi-pass cell gas measurements, remote insect monitoring and classification by elastic and fluorescence spectroscopy, to food safety applications and human sinusitis and otitis diagnostics.

Sune Svanberg became a professor and head of the Atomic Physics Division of Lund University, Sweden, in 1980, and remained in this position up till 2008. In Lund a vigorous program of laser spectroscopy, including basic atomic physics and applications to energy, environmental and medical research has been pursued.  In 1995 he was appointed director of the newly established Lund Laser Centre, which also gained the EC status of a European Large Scale Facility. He remained its director till 2010, and continues as Senior professor at the centre. Since 2011 he is also a part-time Distinguished professor at the South China Normal University, Guangzhou, focusing on environmental monitoring and biophotonics. Sune Svanberg has over 600 scientific papers. He received around 20 international and national awards, including 5 gold medals, and in addition 4 honorary doctor degrees and 4 honorary professorships. He is Fellow of 4 learned professional societies. He is a member of 6 scientific academies, including the Royal Swedish Academy of Sciences and the Royal Swedish Academy of Engineering Sciences. He served 10 years on the Nobel Committee for Physics, 2 years as its chairman.

Poster Previews

There are three poster preview sessions taking place before the Tuesday Poster Session. These sessions allow each poster presenter to have a few minutes to highlight their research to the entire Congress and give the attendees a quick,
concise look at the poster before interacting with authors.

Joint Poster Session:JTu5A

Poster presentations offer an effective way to communicate new research findings and provide a venue for lively and detailed discussion between presenters and interested viewers. Don't miss this opportunity to discuss current research one-on-one with the presenters.

Congress Banquet

Kick-off the congress and join your fellow attendees for the Congress Banquet. Come and taste the local cuisine. The reception is open to all full congress attendees. Congress attendees may purchase extra tickets for their guest.     

Stephen Forrest, University of Michigan, USA
OLEDs in Lighting: Technical Challenges and Opportunities
A potential limitation to using OLEDs for lighting is their low intensity emission per area, leading to high cost. We examine the fundamental limits to OLED brightness.  Limitations to be considered include: thermal effects, triplet and singlet annihilation, exciton-polariton annihilation and injection and outcoupling.  We consider the differences between single element and stacked devices in overcoming these fundamental problems.   We also discuss the possibility for the use of organics in lasing applications, following recent advances in exciton management.

Stephen R. Forrest is currently the Peter A. Franken Distinguished University Professor of Engineering; Paul G. Goebel Professor of Engineering in EE, MSE, Physics; and Distinguished University Innovator at the University of Michigan. He received his BA in physics from the University of California and his MSc/PhD from the University of Michigan. He was with Bell Labs until 1985, joined EE/MS Departments at USC and worked on optoelectronic integrated circuits, and organic semiconductors. In 1992, he moved to Princeton as director of National Center for Integrated Photonic Technology, Center for Photonics and Optoelectronic Materials, Chair of EE Department. From 2004-2009, he was appointed CSM Visiting Professor-EE at National University of Singapore.  In 2006, he rejoined University of Michigan as VP of Research. He is recognized for innovations in organic LEDs, organic thin films, photodetectors for optical communications systems and phosphorescent OLEDs. Professor Forrest has authored ~551 papers, 281 patents and is co-founder in several companies: Sensors Unlimited, Epitaxx, Inc., NanoFlex Power Corporation, Universal Display Corp., ASIP, Inc. He is on the board of many institutes including:  Board of Directors of Applied Materials and PD-LD, Inc., Board of Governors of Technion – Israel Institute of Technology, Vice Chairman of Board of University Musical Society.

Shanhui Fan, Stanford University, USA
Controlling Current, Voltage and Heat in a Solar Cell with Photonic Nanostructures
The use of photonic nanostructures offer many new opportunities for enhancing the performance of solar cells. In this talk, we will present the theoretical consideration for current and voltage enhancement through photonic engineering. We will also show that the use of the photonic structures may lead to the possibility of radiative cooling of solar absorbers.

Shanhui Fan is a Professor of Electrical Engineering, and the Director of the Edward L. Ginzton Laboratory, at the Stanford University. He received his Ph. D in 1997 in theoretical condensed matter physics from the Massachusetts Institute of Technology (MIT). His research interests are in fundamental studies of solid state and photonic structures and devices, especially photonic crystals, plasmonics, and meta-materials, and applications of these structures in energy and information technology. He has published over 330 refereed journal articles that were cited 37,000 times according to Google Scholar, has given over 250 invited talks, and was granted 48 US patents. Prof. Fan received a National Science Foundation Career Award (2002), a David and Lucile Packard Fellowship in Science and Engineering (2003), the National Academy of Sciences Award for Initiative in Research (2007), and the Adolph Lomb Medal from the Optical Society of America (2007). He is a Fellow of the IEEE, the American Physical Society, the Optical Society of America,  and the SPIE.

Wenqing Liu, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, China
Progress of Atmospheric Environmental Monitoring Technology in China
The formation, transport and evolution process of air pollution have obvious temporal and spatial correlation. Various on-line monitoring technologies based on optical detection and spectral retrieval play an irreplaceable role in air pollution monitoring with high sensitivity, high resolution, high selectivity, multi-component and real-time etc. advantages. The new development of monitoring technologies for air quality, emission sources, traffic emission and regional air pollution in China are introduced. By studying the interaction of light and environmental material, the database of the spectral characteristic and the spectrum quantitative analysis algorithm have been developed. Combined with the engineering technology, air pollution monitoring systems have been developed on DOAS, TDLAS, LIF, LIDAR techniques. Application demonstrations have been carried out in many Chinese Cities, e.g. Beijing, Shanghai, Guangzhou, Nanjing etc. And the requirements and suggestions about further research of atmospheric monitoring technologies are proposed.

Wenqing Liu, from Chinese Academy of Engineering, engages mainly in environment monitoring technology research and its related application. He pioneered technology innovation in the area of environment Optical monitoring, conducted a large quantity of scientific experiments and led their industrialization. He lead his team realized system integration of multiple three-dimensional monitoring technologies for atmospheric pollution, and guided its usage in the megacity pollution monitory, which made a noteworthy contribution to the environment optical monitoring research of China.

Tae-Yeon Seong, Korea University, South Korea
High Performance GaN-based Light-emitting Diodes Through Efficient Current Injection: Ohmic Contact Technology for LEDs
High-performance GaN-based LEDs are of technological importance for their applications in traffic signal, full color display, and general illumination. In particular, to realize the solid-state lighting application, the enhancement of output power and turn-on voltage of LEDs is essential. In this talk, we will present recent advances in ohmic-contact technology for GaN-based LEDs. A wide variety of ways of enhancing current injection efficiency through the formation of transparent and reflective ohmic contacts are presented.

Tae-Yeon Seong is a Professor of Materials Science and Engineering, and Chair of Department of Nanophotonics at Korea University. He received his DPhil from the University of Oxford in 1992. In 2005, he joined Korea University from Gwangju Institute of Science and Technology where he was Department chair (from 2003 to 2005) and Director (from 2003 to 2005) of Brain Korea 21 Centre for Advanced Materials Research. His research focuses on the area of wide band-gap materials and devices (emitters, detectors and electronics) using GaN and ZnO, and developing these materials for illumination applications. He has published over 400 peer-reviewed journal articles and holds over 200 patents. He is a Fellow of the Institute of Physics (UK) and SPIE, Associate Editor of Semiconductor Science and Technology, an Editorial Advisory Member of the Electrochemical Society Journals, and Editorial Board Member of Journal of Solid-State Lighting.

Wei Shan, JA Solar, China
Mass Producible PERC Cells With Over 20% Conversion Efficiency
Recent revitalization of passivated emitter and rear cell (PERC) concept in the silicon PV industry has resulted in solar energy conversion efficiency higher than 20% being reached on p-type solar grade single-crystalline silicon (mono-Si) wafers during the past few years, thanks to the technological advance in utilizing aluminum oxide for silicon surface passivation. The industry version of PERC cells can be mass produced nowadays on the existing conventional BSF cell manufacturing platform with moderate retrofitting using p-type Si wafers grown by Czochralski method without special quality requirement. Moreover, by applying the same PERC approach in combination with some light trapping technique to the cells using polycrystalline silicon (multi-Si) wafers produced by seeded directional solidification method, an averaged 20% conversion efficiency for multi-Si solar cells can also be practically achieved.

Wei Shan, chief technology officer of JA Solar, has more than 30 years of research and development experience over a great variety of semiconductor material systems that include silicon, germanium, II-VI and III-V compounds, wide-band-gap nitrides, dilute III-nitrides and related nanostructures such as quantum wells, wires, and dots, as well as optoelectronic and photovoltaic device applications based on these material systems. His publication includes over 160 peer-reviewed journal articles and prestigious conference papers, as well as book chapters. He has been with JA Solar since 2008.

Ranga Pitchumani, Advanced Materials and Technologies Laboratory,Department of Mechanical Engineering,Virginia Tech, USA
Challenges and Opportunities for Cost-Competitive Concentrating Solar Power
Concentrating solar power (CSP) technologies use mirrors to focus sun’s rays onto an absorber, where the photons are converted to heat that’s ultimately transferred to the working fluid of a turbine to generate electricity. The ability of CSP to incorporate simple and efficient thermal energy storage is a principal advantage of the technology. Widespread adoption of this technology calls for steep cost reductions, which is a primary challenge being addressed through several world-wide efforts. The talk will focus on the technical challenges and opportunities for innovation and cost reduction, for achieving cost-competitive concentrating solar power.

Ranga Pitchumani is the George R. Goodson Professor of Mechanical Engineering at Virginia Tech, where he directs the Advanced Materials and Technologies Laboratory with research in the areas of energy systems and sciences, materials manufacturing, composite materials, microsystems and uncertainty quantification. Dr. Pitchumani also served in an invitational role as the Chief Scientist for the U.S. Department of Energy (DOE) SunShot Initiative, where he was an advisor to SunShot, and directed the Systems Integration and the Concentrating Solar Power programs. At DOE, he set the science and technology vision for SunShot, established funding priorities, directed a team of technical, financial and support professionals and oversaw the solar R&D programs at the Industry, National Laboratories and Universities. Dr. Pitchumani is the author of over 200 refereed articles and book chapters, co-editor or editor of 8 book volumes, and inventor on 2 patents or disclosures. He is an Editor of Solar Energy, past Associate Editor of the ASME Journal of Heat Transfer, and serves on the Editorial Boards of the Journal of Thermoplastic Composite Materials, Journal of Composite Materials, and Frontiers in Heat and Mass Transfer. Dr. Pitchumani has received many awards including the Young Investigator Award from the Office of Naval Research. He is a Fellow of the American Society of Mechanical Engineers and an elected member of the Connecticut Academy of Science and Engineering. Dr. Pitchumani holds doctoral and master’s degrees from Carnegie Mellon University and a bachelor’s degree from the Indian Institute of Technology, Bombay, all in Mechanical Engineering.

Junhao Chu, Shanghai Institute of Technical Physics, CAS, and East China Normal University, Shanghai, China
Optical Transition and Manipulation for Solar Energy Technology
Optical Transition and Manipulation are most important issues for the devices and their applications of solar energy. In this talk, we present some key regulations for the design and preparation of solar cell and related solar energy devices, such as wider spectroscopy of absorption, higher absorption coefficient and longer optical absorption route, less recombination of photo-generated carriers, etc.. A novel development tendency of solar PV techniques has been also discussed.       

Junhao Chu is a Member of Chinese Academy of Sciences, a professor of semiconductor physics at Shanghai Institute of Technical Physics, CAS and the Dean of the School of Information Science and Technology of East China Normal University, the Chief Editor of Chinese Journal of Infrared and Millimeter Waves. He received his PhD degree at SITP, CAS in 1984, and was A v Humboldt Fellow at TU Muenchen, Germany 1986/88. He was the director of National Laboratory for Infrared Physics from 1993 to 2003. He has organized the Key Laboratory of Polar Materials and Devices, Ministry of Education at ECNU in 2008, and Shanghai Center of Photovoltaics in 2008.  His research fields are the narrow gap semiconductors, infrared physics, ferroelectrics, spin-electronics , and solar cells. In the areas some 500 papers, 3 monographs and 10 book chapters have been published, and more than 200 conference presentations including more than 50 invited talks have been presented. He received 3 National Natural Science Awards and 12 Ministry Science and Technology Awards in China. He is a Fellow of the SPIE. He received 3 honorary professorships. He has been co-director of Joint Institute of ECNU and Colorado State University for New Energy and Environment.

Ulrich Platt, Heidelberg University, Germany
Storage Requirements in an European Scenario of Electricity Generation from 100% Renewable Sources
We investigated the relationship of power plant mix and required energy storage capacity with a computer model based on global weather data. We focus on energy storage requirements of an electricity supply for Europe by wind and solar power (PV). The minimum required energy storage capacity for a 100% renewable (wind and PV) electricity supply occurs at »30% wind and »70% PV installed capacity. A transition of today’s European electricity supply to a 100% renewable scenario would rise the required energy storage capacity exponentially to about 150 TWh (3.8% of the annual electricity demand). However the installation of excess wind and PV power plant capacity is shown to drastically reduce the required energy storage. For instance 10% excess capacity cut the required storage capacity in half, higher excess capacities lead to further, significant reduction of storage requirements. Furthermore, storage can be separated into daily (short term) storage and seasonal (long term) storage. Seasonal storage capacity has to be about two orders of magnitude larger than storage for the daily cycle, however, the annual sum of stored energy is nearly equal for both types of storage. In summary, an electricity supply by only wind and PV power is shown to be perfectly feasible with respect to the required energy storage capacity and required land area for power plants, and offers competitive electricity generating cost.

Ulrich Platt was born on July 27, 1949 in Eberbach, Germany.  He received his diploma in Physics at the University of Heidelberg in 1974.By 1977, Professor Platt earned a promotion due to his work on: Mikrometeorologische Bestimmung der SO2-Abscheidung im Boden.  He worked as a scientist at the Institute for Atmospheric Chemistry of the Nuclear Research Centre Jülich until 1980. For the next several years Professor Platt worked as a visiting scientists at the SAPRC in the University of California/ Riverside.  In 1989, he was the chair (Ordinarius) at the University of Heidelberg in experimental physics.  By 1990, Professor Platt became the Director at the Institute for Environmental Physics of the University of Heidelberg, where he remains to this day. Throughout his stay as the Director at the Institute for Environmental Physics of the University of Heidelberg, he has received a number of scientific distinctions and awards.  He is an external scientific member of the Max-Planck-Society (MPG), a member of IGAC (International Global Atmospheric Chemistry) Scientific Steering Committee (SSC) (2001-2006), a member of SOLAS (Surface Ocean and Lower Atmosphere Studies) Scientific Steering Committee (2002-2007), as well as an assortment of other recognitions. 

OSA - The Optical Society

OSA - The Optical Society