Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

ISFH achieves 20.2% record module efficiency for large-area PV modules with PERC solar cells

20.01.2016

The Institute for Solar Energy Research Hamelin increases the module efficiency for large-area solar modules with industrial silicon-based PERC solar cells to a record value of 20.2% with a power of 303.2W. Thereby, the ISFH surpasses the former module record efficiency of 19.5% for industrial-type modules with p-type silicon solar cells and screen-printed metallization.

The Institute for Solar Energy Research Hamelin (ISFH), an affiliated institute of the “Leibniz Universität Hannover”, increases the module efficiency for large-area solar modules with industrial silicon-based PERC solar cells to a record value of 20.2% with a power of 303.2W, which was confirmed in an independent measurement by the TÜV Rheinland.


Close-up of the high-efficient PV module. The bright stripes between and on top of the cells arise from light reflection by the high-reflective cell interconnectors and the space between solar cells.

ISFH

Thereby, the ISFH surpasses the former module record efficiency of 19.5% for industrial-type modules with p-type silicon solar cells and screen-printed metallization.

The results were achieved within the project “Prozessplattform und Verlustanalyse für klimastabile hocheffiziente Photovoltaikmodule mit kristallinen PERC-Si-Solarzellen” (PERC-2-Module) funded by the German Federal Ministry for Economic Affairs and Energy (BMWi).

The module consists of 120 halved solar cells that feature an average efficiency of 20.8%. By using the half-cell design the current of the cell strings is reduced resulting in a significant reduction of the series resistance losses. The distance between the cells is reduced to a practical minimum to increase the module efficiency.

The resultant module area without frame is 1.501 m2. In order to use light hitting the cell interconnects and the space between the solar cells for current generation, high-reflective and structured materials are utilized which guide the light onto the solar cells active surface.

“This record efficiency is the result of a closely joined development of the PERC solar cell technology on the one hand and of the high-efficient module processes at ISFH on the other hand”, explains Dr. Henning Schulte-Huxel, the head of the research project PERC-2-Module.

The p-type PERC solar cells were fabricated using an industrial screen printing process for front and rear side. These cells developed at ISFH are optimized for the operation in modules and show no potential-induced degradation.

This was confirmed in numerous internal tests of the solar cells using the conditions of 85% relative humidity, a temperature of 85°C, and an applied voltage of 1000V for 1000h. This stress surpassed the standard test by more than ten times.

About 80% of all commercially-produced solar cells consist of p-type crystalline silicon wafers in combination with a screen printed metallization. Since the material cost during module manufacturing and especially the system cost grow with the module area, the demonstrated optimization of the module efficiency is highly relevant for the reduction of the cost of electricity generated by photovoltaics.

Dr. Roland Goslich | idw - Informationsdienst Wissenschaft
Further information:
http://www.isfh.de/

More articles from Power and Electrical Engineering:

nachricht The role of Sodium for the Enhancement of Solar Cells
17.07.2018 | Max-Planck-Institut für Eisenforschung GmbH

nachricht Behavior-influencing policies are critical for mass market success of low carbon vehicles
17.07.2018 | International Institute for Applied Systems Analysis (IIASA)

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

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

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

Im Focus: Chemical reactions in the light of ultrashort X-ray pulses from free-electron lasers

Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.

Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

Microscopic trampoline may help create networks of quantum computers

17.07.2018 | Information Technology

In borophene, boundaries are no barrier

17.07.2018 | Materials Sciences

The role of Sodium for the Enhancement of Solar Cells

17.07.2018 | Power and Electrical Engineering

VideoLinks
Science & Research
Overview of more VideoLinks >>>