Fraunhofer Energy Alliance
Fraunhofer Energy Alliance

Renewable Energy

PHOTOVOLTAICS

© iStock.com l Adam Smigielski I Solar Power Plant on Open Space

Photovoltaics

The expertise of the Fraunhofer Energy Alliance runs along the entire value chain of silicon photovoltaics. It spans the entire range from the crystallization, wafering and cell production through to the interconnection of modules. Experts at Fraunhofer develop optimized overall system designs and are leading in the inverter technology. For concentrating PV systems, highly efficient III-V multi-junction solar cells and optical systems are developed to bundle the sunlight. The portfolio also includes silicon thin-film cells and the usage of alternative material systems. In the up-and-coming sector of organic solar cells and dye-sensitized cells, research is conducted on the improvement of efficiency and long-term stability.

Competencies of the Fraunhofer Energy Alliance in the field of Photovoltaics

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PV Production Technology

The institutes of Fraunhofer Energy Research are working on innovative production technologies for solar cells with the aim of using solar energy more effectively. On the one hand, standard processes for the production of solar cells are being further developed. On the other hand, new technological concepts are systematically transferred from laboratory research to industrial application. To this end, we evaluate and develop manufacturing processes and process technology components, manufacture advanced industrial solar cell structures and characterize and optimize materials and solar cells. Aspects such as digitalization, recycling and sustainable production are important components of our concepts.

Projects

 

© Fraunhofer ISE

AVATAR

The outlined project represents an approach to digitizing the flatbed screen printing process and includes the optimization of production parameters using CFD simulation and artificial intelligence...

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© Fraunhofer ISE

NextTex

 A consortium led by Fraunhofer ISE has therefore developed a proof-of-concept for a future production line with a throughput of 15 000 to 20 000 wafers per hour as part of the "NextTec" project funded by the German Federal Ministry of Economics and Climate Action (BMWK). 

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Kumelle

The "Kumelle" project addresses the development of perovskite-silicon tandem solar cells, high solar cell efficiencies of over 30 % and copper metallization instead of expensive and increasingly scarce silver.

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Silicon Photovoltaics

Silicon is currently the most commonly used semiconductor material for the production of solar cells. The keys to this dominant market position are, on the one hand, a robust and cost-effective manufacturing process and, on the other, the high efficiency and high reliability of silicon-based PV modules. Efficiency in particular plays a decisive role in further reducing electricity generation costs and is therefore the focus of research activities. The experts of the Fraunhofer-Gesellschaft support companies in research and development along the entire value chain from silicon material to solar cell and module to system. The technological maturity of our projects covers the entire range from laboratory research to industry-oriented development. With new technologies and world record efficiencies from our research laboratories, we set scientific trends in photovoltaics and thus provide important impulses for new developments.

Projects

 

© Fraunhofer ISE

WaMTec

In the “WaMTec” project, companies and research institutes from four European countries are working on the further development of technologies for the manufacture of silicon wafers, solar cells and modules.

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RIESEN

In the »RIESEN« project, a highly efficient perovskite/perovskite/Si triple-junction solar cell is to be developed. For the Si subcell, the TOPCon record cells of Fraunhofer ISE will serve as a basis. 

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StroKoFo

The StroKoFo project focuses on an innovative process for forming or optimizing the metal-semiconductor contact of silicon solar cells (StroKoFo process), which is based on a different physical principle than the conventional firing process.

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Perovskite and Tandem Solar Cells

Organic and perovskite solar cells offer promising opportunities in terms of versatility and cost reduction. Researchers of the Fraunhofer-Gesellschaft are working on developing novel materials to increase the efficiency of these solar cells, to improve long-term stability and to reduce production costs. In addition to conventional single-junction solar cells, we are developing silicon-based multi-junction or tandem solar cells. These use two or more photovoltaic absorbers such as perovskites or III-V semiconductors with different band gaps in a vertical tandem stack. In this way, the solar spectrum can be used much more efficiently, so that efficiencies above the limit of 29.4% for single-junction solar cells made of silicon can be realized. Our experts are working on optimizing these tandem solar cells and transferring them to industrial production. In the future, this means: a higher energy yield per area, potential savings in materials, and better sustainability.

Projects

 

© Fraunhofer ISE

PrEsto

In the "Presto" project, various manufacturing processes for the production of perovskite solar cells are being evaluated.

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PeroTec

In the »PeroTec« Fraunhofer project, the technological prerequisites for applications in the square meter range should be established and patent-protected for the industrial use of novel perovskite materials.

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© Fraunhofer ISE/Torsten Rößler

HoTSun

Perovskite-silicon tandem solar cells enable higher efficiency levels than today’s silicon solar modules, but place high demands on module manufacturing.

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Thin-Film Photovoltaics

Compared to solar cells made of crystalline silicon, thin-film solar modules are not produced from individual wafers, but are applied as large-area layers. This could result in cost advantages for high-volume production, and flexible geometries can be realized. Thin film photovoltaics have a much smaller market share, but have advantages in certain applications. The modules cope better with shading and deliver higher yields in low light conditions. Researchers at Fraunhofer are working on exploiting the potential of thin-film modules by using improved materials and optimizing production on an industrial scale.

Projects

 

© Fraunhofer ISE

ALFAMA

ALFAMA is a European response to current "calls" from the satellite market for more and more energy from the solar wings for satellites while at the same time reducing weight and stowage volume.

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ADAPT

The "ADAPT" project is intended to bring Fraunhofer ISE researchers together with potential users in agriculture in order to determine practical requirements for the technology and, conversely, to enable farmers to gain initial experience with organic solar films.

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SuPerTandem

The SuPerTandem project aims to develop manufacturing technologies for 2-terminal tandem cells and monolithically connected modules on flexible films using low-cost perovskite absorber layers.

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Concentrator Photovoltaics

In areas with a lot of direct solar radiation, the use of concentrator photovoltaics (CPV) is a cost-effective technology. Very high efficiencies are achieved by concentrating sunlight through lenses on highly efficient multi-junction solar cells made of III-V compound semiconductors. The institutes of Fraunhofer Energy Research cover all aspects from the solar cell to the module to the optimization of the entire system. To this end, we apply our expertise in optics, assembly and joining technology as well as in theoretical modeling and module design. Thus, our portfolio addresses a wide range of companies developing PV systems with low to very high optical concentration. Our competencies also include the evaluation of specific requirements for the use of concentrator photovoltaics on site within and outside Europe.

Projects

 

© Fraunhofer ISE

micro-CPV

The objective of the "micro-CPV" joint project was to develop a concentrator photovoltaic (CPV) module based on these technologies, which enables high PV performance while at the same time exploits cost reduction potentials in production.

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© Fraunhofer ISE

QuintuMod

In the project „QuintuMod”, a reliable, cost-efficient and high efficient CPV module will be developed and optimized.

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HIPERION

The aim of the project is the industrialization of an innovative hybrid PV/CPV module.

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Module Technologies

With the help of module technology solar cells become a durable product for safe operation in PV power plants. The institutes of the Fraunhofer-Gesellschaft have a comprehensive laboratory infrastructure. Customers have access to a wide range of modern process and analysis platforms for the connection and lamination of solar cells, especially for material testing and product and process development. In addition, we provide support in the qualification of materials and offer comprehensive analyses of degradation and claims. Highest precision is also offered by our accredited calibration laboratory. In the sense of the one-stop shop, we offer services and product developments along the entire PV value chain from a single source.

Projects

 

© Fraunhofer ISE

CTS1000+ - More Energy per Cell Power

State-of-the-art methods are used to achieve maximum module performance from a given cell performance under laboratory conditions (Standard Testing Conditions STC).

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© Fraunhofer CSP

E2 – E-Quadrat

In the »E2 – E-Quadrat« project, a team from Fraunhofer CSP together with NOVO-TECH GmbH, developed and tested materials that are both highly reliable in the long term against all weather conditions and fully recyclable.

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PV Systems and Power Plants

When it comes to the use of modules in photovoltaic power plants, experts of the Fraunhofer-Gesellschaft analyze and advise on every phase of a project: from development, implementation and procurement to commissioning and ongoing operation. In this way, we ensure comprehensive quality assurance for PV power plant projects. Besides traditional use in power plants, integrated photovoltaics offers new fields of application for photovoltaics. In addition to building-integrated photovoltaics, which is increasingly in demand, promising markets are developing as a result of innovative technologies such as those used for integration in vehicles and traffic routes. Concepts such as agri-photovoltaics and floating photovoltaics with innovative land use concepts offer new perspectives with regard to renewable energy supply in Germany and around the world.

Projects

 

© Pohlen Solar GmbH

OptOM

In the "OptOM" project, Pohlen Solar GmbH, Centroplan GmbH, Mondas GmbH and the Fraunhofer Institute for Solar Energy Systems ISE are developing new methods for intelligent monitoring of PV power plants.

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© badenova, Albert Josef Schmidt

RV20plus

The "PV20plus"project supports operators of PV systems that are no longer eligible for EEG remuneration after 20 years in deciding on sustainable and profitable continued operation.

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STEWART

 As part of the STEWART project, an interdisciplinary and international team is working on the development of a scientifically sound and environmentally friendly concept for floating photovoltaic systems...

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