High-Concentration Systems (HCPV)

R&D Services

Our R&D services comprise designing, producing and characterizing concentrator modules and components, as well as analyzing complete systems:

Concentrator Modules

Production Processes

Modeling, Design and Simulation

Reliability and Long-Term Durability Testing

Characterizing CPV System Components

We develop high concentration photovoltaic systems that allow III-V multi-junction solar cells to be used for terrestrial applications. To do so, we analyze and assess optical components that concentrate sunlight by a factor of 300-1000 before it is converted into electrical energy using III-V multi-junction solar cells. Within the field of concentrator systems, we work to develop and refine the entire technology chain from solar cells, concentrator optics and module production through dedicated electronics to complete systems and monitoring. One key integral part in this technology is the development of concentrator modules, which is coordinated at Fraunhofer ISE in the Concentrator Technology Evaluation Center (Con-TEC). Research at Con-TEC primarily focusses on optimizing design, manufacturing processes and CPV module reliability. Our expertise in the field of thermal, optical and electrical simulation is offered to our clients, and we optimize and develop processes and innovative systems.

For more than two decades, we have been developing our lens based FLATCON® technology devised at Fraunhofer ISE. The module uses Frensel lenses produces with the silicone-on-glass (SoG) technology to concentrate the solar radiation. On this technology, our novel hybrid module EyeCon is based. It converts direct, diffuse and - with bi-facial PV cells - even the rear irradiance into electricity to increase the power output further. For cost reduction, we investigate micro-CPV modules.
Beside of modules with lenses as primary optics, we develop module concepts using mirror optics as concentrators to reach high geometrical concentrations. On system level, we are researching the co-generation of heat and electricity in concentrating systems with the goal of reaching system efficiencies of over 70%.

A variety of experimental methods are available for characterizing CPV components.

Within the field of high concentration PV systems, we develop concentrator modules and systems. We follow an holistic approach that includes optical, thermal, mechanical and electrical aspects and offer:

  • Integration and testing of innovative new cells in concentrator modules
  • Modules with solar cells from few hundred micrometres to few square centimetres
  • Experimental investigation of new concepts and components (e.g. integration of secondary optics) for CPV
  • Design optimization and analysis using finite element methods (FEM) and computational fluid dynamics (CFD)
  • Pilot and small production batches using automated manufacturing technologies (e.g. pick & place; bonded, adhesive and soldered joints, electrical interconnection)
  • Reliability and long-term stability testing
  • Lab and field measurements including power rating

Selected Research Projects

 

QuintuMod

Development of a low-cost and high efficient solar module using a solar cell with 5-pn junctions

 

micro-CPV

Development of a Highly Concentrating CPV Module Based on Modern Micro-Production Technology

 

CPVIndia

Research cooperation on innovative climate technology

 

HeKMod4

Highly efficient concentrator module with GaSb-based four-junction solar cell

 

HyCon

Solar Hydrogen Generation using a HyCon System

 

Current Publications - High-Concentration Systems (HCPV):

Jahr
Year
Titel/Autor:in
Title/Author
Publikationstyp
Publication Type
2022 Improving the Accuracy of Energy Yield Calculations of Tandem Solar Cell-based CPV-Modules
Steiner, M.; Mathur, P.; Sarkar, S.; Siefer, G.
Zeitschriftenaufsatz
Journal Article
2021 Technical Boundaries of Micro-CPV Module Components: How Small is Enough?
Wiesenfarth, M.; Iankov, D.; Martínez, J.F.; Nitz, P.; Steiner, M.; Dimroth, F.; Helmers, H.
Vortrag
Presentation
2021 Technical Boundaries of Micro-CPV Module Components: How Small is Enough
Wiesenfarth, M.; Martínez, J.F.; Steiner, M.; Iankov, D.; Nitz, P.; Dimroth, F.; Helmers, H.
Vortrag
Presentation
2020 Development and Outdoor Characterization of a Hybrid Bifacial HCPV Module
Martinez, J.; Steiner, M.; Wiesenfarth, M.; Fellmeth, T.; Dörsam, T.; Wiese, M.; Glunz, S.W.; Dimroth, F.
Zeitschriftenaufsatz
Journal Article
2019 FLATCON® CPV Module Technology: A New Design based on the Evaluation of 10 Years of Outdoor Measurement Data
Wiesenfarth, M.; Steiner, M.; Dörsam, T.; Siefer, G.; Dimroth, F.; Nitz, P.; Bett, A.W.
Konferenzbeitrag
Conference Paper
2019 Outdoor Experimental Characterization of Novel High-Efficiency High-Concentrator Photovoltaic (HCPV) modules Using Achromatic Doublet on Glass (ADG) Fresnel Lenses as Primary Optics
Vallerotto, G.; Wiesenfarth, M.; Victoria, M.; Steiner, M.; Anton, I.; Jost, N.; Askins, S.; Sala, G.
Konferenzbeitrag
Conference Paper
2019 Pushing Energy Yield with Concentrating Photovoltaics
Steiner, Marc; Wiesenfarth, Maike; Martínez Sánchez, Juan Francisco; Siefer, Gerald; Dimroth, Frank
Konferenzbeitrag
Conference Paper
2019 CPVIndia - Energy Yield Forecasting with PVsyst
Steiner, M.; Wekkeli, A.; Ojha, S.; Sardar, S.; Singh, V.; Singh Sawhney, H.; Singh Chandok, J.; Siefer, G.
Konferenzbeitrag
Conference Paper
2018 Operation & maintenance - the key for reliable performance in a CPV power plant
Wüllner, Johannes; Steiner, Marc; Wiesenfarth, Maike; Bett, Andreas
Konferenzbeitrag
Conference Paper
2018 Evaluation of 53 kW CPV system in India
Steiner, M.; Bösch, A.; Wekkeli, A.; Ojha, S.; Sardar, S.; Singh, J.; Singh, V.; Singh Chandok, J.; Siefer, G.
Vortrag
Presentation
2018 Trends in Solar Electricity
Bett, A.W.
Vortrag
Presentation
2018 4-terminal CPV module capable of converting global normal irradiance into electricity
Martínez, Juan F.; Steiner, Marc; Wiesenfarth, Maike; Dimroth, Frank
Konferenzbeitrag
Conference Paper
2018 Analysis of the performance of an on-axis mirror module design compared to a FLATCON module
Wiesenfarth, Maike; Gamisch, Sebastian; Jakob, Peter; Steiner, Marc; Bett, Andreas
Konferenzbeitrag
Conference Paper
2018 Challenges in the Design of Concentrator Photovoltaic (CPV) Modules to Achieve Highest Efficiencies
Wiesenfarth, M.; Anton, I.; Bett, A.W.
Zeitschriftenaufsatz
Journal Article
2018 Component cell-based restriction of spectral conditions and the impact on CPV module power rating
Steiner, Marc; Muller, Matt; Siefer, Gerald; Bett, Andreas W.
Zeitschriftenaufsatz
Journal Article
2017 Concentrating photovoltaic systems
Steiner, M.; Gerstmaier, T.; Bett, A.W.
Aufsatz in Buch
Book Article
2017 Uncertainty estimation of spectral matching ratio based power rating of CPV modules
Steiner, M.; Siefer, G.; Bett, A.W.
Konferenzbeitrag
Conference Paper
2016 43 % direct sunlight conversion efficiency using 4J cell with achromatic full glass lens
Steiner, M.; Siefer, G.; Schmidt, T.; Wiesenfarth, M.; Dimroth, F.; Bett, A.W.
Konferenzbeitrag
Conference Paper
2016 Rating of CPV modules: Results of module round robins
Steiner, Marc; Siefer, Gerald; Baudrit, Mathieu; Askins, Stephen; Domínguez, César; Antón, Ignacio; Roca, Francesco; Fucci, Raffaele; Cancro, Carmine; Romano, Antonio; Graditi, Giorgio; Pugliatti, Paola Maria; Stefano, Agnese di; Kenny, Robert; Norton, Matthew; Minuto, Alessandro; Morabito, Paolo; Muller, Matthew; Riley, Daniel; Pratt, Larry
Konferenzbeitrag
Conference Paper
2016 CPV-T Mirror Dish System Combined with Water Desalination Systems
Wiesenfarth, M.; Went, J.; Bösch, A.; Dilger, A.; Kec, T.; Kroll, A.; Koschikowsi, J.; Bett, A.W.
Konferenzbeitrag
Conference Paper
2016 Recent Development in Direct Generation of Hydrogen Using Multi-Junction Solar Cells
Ohlmann, J.; Martínez, Juan F.; Lackner, D.; Förster, P.; Steiner, M.; Fallisch, A.; Dimroth, F.
Konferenzbeitrag
Conference Paper
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