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Eli Yablonovitch is an American physicist and engineer who, along with Sajeev John founded the field of photonic crystals in 1987. He and his team were the first to create a 3-dimensional structure that exhibited a full photonic bandgap, which has been named Yablonovite. In addition to pioneering photonic crystals, he was the first to recognize that a strained quantum-well laser has a significantly reduced threshold current compared to its unstrained counterpart. This is now employed in the majority of semiconductor lasers fabricated throughout the world. His seminal paper reporting inhibited spontaneous emission in photonic crystals is among the most highly cited papers in physics and engineering.
Photovoltaics (PV) is the conversion of light into electricity using semiconducting materials that exhibit the photovoltaic effect, a phenomenon studied in physics, photochemistry, and electrochemistry. The photovoltaic effect is commercially used for electricity generation and as photosensors.
In the 19th century, it was observed that the sunlight striking certain materials generates detectable electric current - the photoelectric effect. This discovery laid the foundation for solar cells. Solar cells have gone on to be used in many applications. They have historically been used in situations where electrical power from the grid was unavailable.
A solar cell, or photovoltaic cell, is an electronic device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon. It is a form of photoelectric cell, defined as a device whose electrical characteristics, such as current, voltage, or resistance, vary when exposed to light. Individual solar cell devices are often the electrical building blocks of photovoltaic modules, known colloquially as solar panels. The common single junction silicon solar cell can produce a maximum open-circuit voltage of approximately 0.5 volts to 0.6volts.
A solar cell panel, solar electric panel, photo-voltaic (PV) module or solar panel is an assembly of photovoltaic cells mounted in a framework for generating energy. Solar panels use sunlight as a source of energy to generate direct current electricity. A collection of PV modules is called a PV panel, and a system of PV panels is called an array. Arrays of a photovoltaic system supply solar electricity to electrical equipment.
James Donald Meindl was director of the Joseph M. Pettit Microelectronics Research Center and the Marcus Nanotechnology Research Center and Pettit Chair Professor of Microelectronics at the Georgia Institute of Technology in Atlanta, Georgia. He won the 2006 IEEE Medal of Honor "for pioneering contributions to microelectronics, including low power, biomedical, physical limits and on-chip interconnect networks.”
Martin Andrew Green is an Australian engineer and professor at the University of New South Wales who works on solar energy. He was awarded the 2021 Japan Prize for his achievements in the "Development of High-Efficiency Silicon Photovoltaic Devices". He is editor-in-chief of the academic journal Progress in Photovoltaics.
Allen M. Barnett was a research professor of electrical engineering at the University of Delaware. He was the principal investigator of the DARPA-funded Consortium for Very High Efficiency Solar cells. Barnett was the founder and CEO of solar-cell producer Astropower, Inc. He was also a Professor of Advanced Photovoltaics at the University of New South Wales (UNSW) School of Photovoltaic and Renewable Energy Engineering (SPREE) in Sydney Australia.
Hans K. Ziegler was a pioneer in the field of communication satellites and the use of photovoltaic solar cells as a power source for satellites.
Third-generation photovoltaic cells are solar cells that are potentially able to overcome the Shockley–Queisser limit of 31–41% power efficiency for single bandgap solar cells. This includes a range of alternatives to cells made of semiconducting p-n junctions and thin film cells. Common third-generation systems include multi-layer ("tandem") cells made of amorphous silicon or gallium arsenide, while more theoretical developments include frequency conversion,, hot-carrier effects and other multiple-carrier ejection techniques.
SunPower is an American provider of photovoltaic solar energy generation systems and battery energy storage products, primarily for residential customers. The company, headquartered in San Jose, California, was founded in 1985 by Richard Swanson, an electrical engineering professor from Stanford University. Cypress Semiconductor bought a majority interest in the company in 2002, growing it quickly until SunPower went public in 2005. TotalEnergies, a French energy and oil company purchased a controlling interest in SunPower for US$1.37 billion in 2011.
There are currently many research groups active in the field of photovoltaics in universities and research institutions around the world. This research can be categorized into three areas: making current technology solar cells cheaper and/or more efficient to effectively compete with other energy sources; developing new technologies based on new solar cell architectural designs; and developing new materials to serve as more efficient energy converters from light energy into electric current or light absorbers and charge carriers.
Antonio Luque López is a Spanish scientist and entrepreneur in the field of photovoltaic solar energy. In 1979 he founded the Institute of Solar Energy of the Technical University of Madrid (IES-UPM) and was its director till his retirement in 2017; he is currently its honorary president as well as professor emeritus in this university. He invented the bifacial solar cell in the late 1970s, today one of the mainstream solar cell technologies, and founded Isofoton in 1981 for its industrial production. He is, arguably, one of the fathers of the science and technology of concentrator photovoltaics and has been active in the research and development of high-efficiency photovoltaic conversion devices, inventing the intermediate band solar cell.
Solar energy – radiant light and heat from the sun. It has been harnessed by humans since ancient times using a range of ever-evolving technologies. Solar energy technologies include solar heating, solar photovoltaics, solar thermal electricity and solar architecture, which can make considerable contributions to solving some of the most urgent problems that the world now faces.
Swanson's law is the observation that the price of solar photovoltaic modules tends to drop 20 percent for every doubling of cumulative shipped volume. At present rates, costs go down 75% about every 10 years.
Mark S. Lundstrom is an American electrical engineering researcher, educator, and author. He is known for contributions to the theory, modeling, and understanding of semiconductor devices, especially nanoscale transistors, and as the creator of the nanoHUB, a major online resource for nanotechnology. Lundstrom is Don and Carol Scifres Distinguished Professor of Electrical and Computer Engineering and in 2020 served as Acting Dean of the College of Engineering at Purdue University, in West Lafayette, Indiana.
Intermediate band photovoltaics in solar cell research provides methods for exceeding the Shockley–Queisser limit on the efficiency of a cell. It introduces an intermediate band (IB) energy level in between the valence and conduction bands. Theoretically, introducing an IB allows two photons with energy less than the bandgap to excite an electron from the valence band to the conduction band. This increases the induced photocurrent and thereby efficiency.
Andres Cuevas is a professor of engineering at the Australian National University, Canberra. He was named a Fellow of the Institute of Electrical and Electronics Engineers (IEEE) in 2014 for contributions to the science and technological development of silicon solar cells.
A bifacial solar cell (BSC) is a photovoltaic solar cell that can produce electrical energy when illuminated on both its surfaces, front or rear. Instead, monofacial solar cells only produce electrical energy when photons impinge on their front side. Efficiency of bifacial solar cells, defined as the ratio of incident luminous power to generated electrical power, is measured independently for the front and rear surfaces under one or several suns. The bifaciality factor (%) is defined as the ratio of rear efficiency in relation to the front efficiency subject to the same irradiance.
Joseph Appelbaum is a professor (emeritus) in the Engineering Faculty at Tel Aviv University, and former holder of the Ludwig Jokel Chair of Electronics in the faculty. He is a life fellow of IEEE “for contributions to solar conversion systems”.
References
- 1 2 3 4 5 "Solar Energy Mini-Series: The Silicon Photovoltaic Roadmap". Stanford University. Archived from the original on October 19, 2021. Retrieved October 11, 2022.
- 1 2 "The father of solar in the U.S." Greentech Media. 2012. Archived from the original on November 13, 2012. Retrieved December 28, 2012.
- ↑ Wolfe, Philip (May 22, 2018). The Solar Generation . John Wiley & Sons & Institute of Electrical and Electronics Engineers (IEEE). p. 185. ISBN 9781119425588.
- 1 2 "SunPower History". SunPower. 2012. Archived from the original on December 31, 2013. Retrieved December 28, 2012.
- 1 2 "Sunny Uplands: Alternative energy will no longer be alternative". The Economist . November 21, 2012. Archived from the original on January 29, 2016. Retrieved December 28, 2012.
