World record for concentrator photovoltaic technology

Mini-module comprised of four-junction solar cells reached 43.4 percent efficiency.

III-V and Concentrator Photovoltaics

In the research topic III-V and Concentrator Photovoltaics, our work focuses on the following fields of work:

 

III-V Epitaxy and Solar Cells

 

Concentrator Assemblies

 

Concentrator Optics

 

High-Concentration Systems (HCPV)

 

Low-Concentration Systems (LCPV)

 

Silicon Concentrator Solar Cells

 

Power-by-Light

In the area of III-V and Concentrator Photovoltaics, Fraunhofer ISE addresses the requirements of the photovoltaic market for both space and terrestrial applications. Our focus continues to be on developing new and customized solar cell architectures with even higher efficiencies. Our success is evidenced in our numerous record efficiencies, among them the current world record for a four-junction solar cell with 46 % efficiency.  We address cost reduction potential at all levels, including optimizations on the system level especially for concentrator photovoltaics. The main aspects considered here include:

  • customized concentrator optics,
  • production and bonding technologies on the industrial level,
  • characterization and modelling at the device and system level, and not least
  • reliability and sustainability during manufacturing and recycling


Silicon solar cells are the cell of choice for low concentrator systems. Silicon-based CPV systems equipped with tracking devices have the advantage of reduced silicon use and short energy payback time EPBT.  Fraunhofer ISE serves its clients in this field by developing suitable cells and systems.

The Power-by-Light technology presents solutions for wireless energy transmission. With this technology, light from a laser or LED is transmitted via a glass fiber optic or in the air to a destined target at which a solar cell converts the light into electricity. Our competence in III-V, concentrator and space technologies enable us to ideally customize the cell properties to match the light source. Up to now, conversion efficiencies of over 57 % have been realized. Lightning surveillance systems for wind generators is one of many potential applications for this promising technology.

As a complement to our research and development work in the research topic III-V and Concentrator Photovoltaics, we offer related testing and certification services to clients.

  • ConTec
    Concentrator Technology and Evaluation Center

Selected Research Topics

 

MehrSi

High-efficiency III-V Multi-Junction Solar Cells on Silicon

 

Virtual Lab CEA

Fraunhofer ISE for Ultra High Efficiency Photovoltaics

 

CPV-T system combined with desalination systems

 

HeKMod4

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

Frank Dimroth

Contact Press / Media

Dr. Frank Dimroth

III-V and Concentrator Photovoltaics

Fraunhofer ISE
Heidenhofstr. 2
79110 Freiburg

Phone +49 761 4588-5258

David Lackner

Contact Press / Media

Dr. David Lackner

III-V Epitaxy and Solar Cells

Fraunhofer ISE
Heidenhofstr. 2
79110 Freiburg

Phone +49 761 4588-5332

Maike Wiesenfarth

Contact Press / Media

Maike Wiesenfarth

Concentrator Assemblies, High-Concentration Systems (HCPV), Low-Concentration Systems (LCPV)

Fraunhofer ISE
Heidenhofstr. 2
79110 Freiburg

Phone +49 761 4588-5470

Peter Nitz

Contact Press / Media

Dr. Peter Nitz

Concentrator Optics

Fraunhofer ISE
Heidenhofstr. 2
79110 Freiburg

Phone +49 761 4588-5410

Florian Clement

Contact Press / Media

Dr. Florian Clement

Silicon Concentrator Solar Cells

Fraunhofer ISE
Heidenhofstr. 2
79110 Freiburg

Phone +49 761 4588-5050

Henning Helmers

Contact Press / Media

Dr. Henning Helmers

Power-by-Light

Fraunhofer ISE
Heidenhofstr. 2
79110 Freiburg

Phone +49 761 4588-5094

 

Publications in the research topic III-V and Concentrator Photovoltaics