Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Fraunhofer ISE Has Developed a New Generation of Reference Cells

08.09.2015

Optimized Structure Allows the Calibration of the Expanded Infrared Spectrum

Scientists at the Fraunhofer Institute for Solar Energy Systems ISE have developed a new version of reference cells for calibrating solar cells. At the institute’s calibration laboratory, a new cell type based on negative, conductive silicon material (n-type), was incorporated while the structure of the reference cell was optimized.


Fraunhofer ISE’s new reference cell was developed according to the international standards of the World PV Scale (WPVS).

© Fraunhofer ISE


Spectral response (Relative Spectral Response) of various reference cells in comparison with the new type (HOQ IR ext.).

© Fraunhofer ISE

For the calibration of different types of solar cells, the reference cell’s spectral response can be accurately adjusted using optical filters, thereby significantly reducing any measurement uncertainty.

The new version of the reference cells meets all international standards (World PV Scale and IEC 60904-2). The new cells will allow test laboratories and cell and module manufacturers in particular to significantly improve the quality of their measurements. The outdoor version of the cell also makes it possible to take exact measurements of solar insolation in the field.

The more accurately the irradiation can be measured, the more accurately the performance of PV systems can be determined. For many years, Fraunhofer ISE’s calibration laboratories – CalLab PV Cells and CalLab PV Modules – have been measuring various types of solar cells and PV modules for international customers pursuant to international norms.

Fraunhofer ISE also offers globally recognized services for yield forecasting and monitoring PV systems. Over the past 15 years, advances have been made in the development of reference cells for indoor and outdoor measurements, and technical consulting services for customers such as test laboratories and plant operators, has been expanded.

With their most recent development success, the Freiburg scientists have been able to further improve their already well-established reference cells, and bring to the market a new version of reference cells which meet the World PV Scale Standard (WPVS).

“For our new version of the WPVS reference cells, we’ve completely changed the interior structure,” says Stefan Brachmann of Fraunhofer ISE. “The reference cells were optimized with respect to linearity, stability, homogeneity, and durability.” For the first time, the Freiburg researchers incorporated a silicon solar cell made of n-type material, which allows for a significant expansion of the spectral response (see chart) in comparison to the p-type reference cells, which are still available.

The new reference cells are therefore particularly suited for the calibration of new solar cells and modules that are also n-type based and have better spectral response than the traditional p-type based reference cells. The thermal coupling of the cell and housing was also improved, reducing the temperature gradient between the solar cell and the housing of the reference cell.

In combination with optical filters, the new reference cells can be adjusted for the calibration of various solar cell technologies. The specific recommendation for use is available on the institute’s website https://www.ise.fraunhofer.de/en/service-units/callab-pv-cells-callab-pv-modules....

Teams in the areas of solar cell development and calibration worked together at Fraunhofer ISE to make the new version of the WPVS reference cells a reality. N-type solar cells are being both produced and calibrated under one roof. As the integration into housing will be carried out by long-standing suppliers, the entire manufacturing cycle of the reference cells can be traced.

This process increases the reliability and quality of the products. In addition to the calibration laboratories CalLab PV Cells and CalLab PV Modules, scientists at Fraunhofer ISE specializing in the development and characterization of solar cells, especially material and cell analysis, were also involved in realizing the new version of the WPVS reference cells.

Weitere Informationen:

http://www.ise.fraunhofer.de/en

Karin Schneider | Fraunhofer-Institut für Solare Energiesysteme ISE

More articles from Physics and Astronomy:

nachricht Physics boosts artificial intelligence methods
19.10.2017 | California Institute of Technology

nachricht NASA team finds noxious ice cloud on saturn's moon titan
19.10.2017 | NASA/Goddard Space Flight Center

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Electrode materials from the microwave oven

19.10.2017 | Materials Sciences

New material for digital memories of the future

19.10.2017 | Materials Sciences

Physics boosts artificial intelligence methods

19.10.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>