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.
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
Nano-scale process may speed arrival of cheaper hi-tech products
09.11.2018 | University of Edinburgh
Nuclear fusion: wrestling with burning questions on the control of 'burning plasmas'
25.10.2018 | Lehigh University
Max Planck researchers revel the nano-structure of molecular trains and the reason for smooth transport in cellular antennas.
Moving around, sensing the extracellular environment, and signaling to other cells are important for a cell to function properly. Responsible for those tasks...
Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.
Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...
Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
19.11.2018 | Event News
09.11.2018 | Event News
06.11.2018 | Event News
20.11.2018 | Life Sciences
20.11.2018 | Life Sciences
20.11.2018 | Physics and Astronomy