Siemens has a 16-percent stake in the U.S. start-up and wants to develop the technology further. Production of the modules is scheduled to begin in mid-2012.
The record was measured under standardized test conditions in a joint project with the Spanish Instituto de Sistemas Fotovoltaicos de Concentración and the University of Madrid. Classic PV modules made of mono- or poly-crystalline silicon and without concentrating lenses currently achieve efficiency ratings of approximately 20 percent and 16 percent, respectively.
Concentrating PV modules have a glass covering with integrated lenses. The lenses focus the rays of sunlight on small surfaces, and for that reason, the photovoltaic panel does not consist entirely of semiconductor material. Instead, it is made of an inexpensive substrate to which small solar cells are attached. The high-performance concentrator modules from Semprius are based on very small solar cells and achieve a 1,000-fold concentration of the solar radiation.
They rely on a process that Semprius developed for inexpensively mounting tiny solar cells on the substrate: Instead of transferring them chip for chip, a special printing module applies up to 1,000 cells per step. The solar cells themselves are based on multiple layers of light-absorbing III-V semiconductors like gallium arsenide. This technology has already attained an efficiency rating of more than 40 percent in the laboratory.
Concentrating photovoltaic modules can only process direct sunlight and must therefore be set up to track the position of the sun. The technology is particularly suited to regions exposed to a large amount of sunlight. Compared with the solar thermal power plants likewise used in these areas, the high-performance concentrator PV modules also permit smaller units with lower outputs. As Semprius continues to develop the technology of the modules, Siemens is contributing tracking systems and inverters, among other things.
Siemens is also responsible for the design of complete solar power plants based on the new modules. Solutions for photovoltaic plants are part of the Siemens Environmental Portfolio, with which the company generated about €30 billion in sales in the fiscal year 2011.
Dr. Norbert Aschenbrenner | Siemens InnovationNews
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IHP presents the fastest silicon-based transistor in the world
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In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
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A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
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The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
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