At the 37th IEEE Photovoltaic Specialist Conference, which took place in Seattle in June 2011, ISFH and Q-Cells already presented small n-type EWT solar cells with an efficiency of 21.6% and an area of (20 × 20) mm2. The cell process is based on monocrystalline Czochralski n-type silicon.
The novel n-type EWT solar cell with 21% efficiency. Foto: ISFH
The high efficiency EWT solar cell.
The boron-doped emitter is defined with laser structuring and is passivated optimally with an aluminumoxide-siliconnitride double layer. ISFH has now scaled up the solar cell production processes to large wafer formats. A novel back contact design with four busbars has been developed, which reduces the finger length to about 50 mm and makes it possible to realize on this large cell area a metalization with a solar cell resitivity contribution less than 0.5 Ohm·cm2.
The project team at ISFH with project manager Till Brendemühl and the R&D team at Q-Cells SE are particularly pleased with the performance of the best (156 × 156) mm2 area solar cell, which has an efficiency of 21.0%, a Jsc of 40.5 mA/cm2, a Voc of 667 mV, and a fill factor of 77.7%.
“This cell type still has the potential for further improvements. We are confident to reach even higher efficiencies” says physicist Fabian Kiefer, who is developing back-contacted solar cells as part of his PhD thesis.
“Our goal is to simplify the production process significantly, while keeping the efficiencies above 21.0% on large cell area” says Prof. Dr. Nils-Peter Harder, head of the group.
Dr. Roland Goslich | idw
The holy grail of nanowire production
20.02.2019 | Ecole Polytechnique Fédérale de Lausanne
Combining infrared radiation and air management to reduce energy use
19.02.2019 | Heraeus Noblelight GmbH
Up to now, OLEDs have been used exclusively as a novel lighting technology for use in luminaires and lamps. However, flexible organic technology can offer much more: as an active lighting surface, it can be combined with a wide variety of materials, not just to modify but to revolutionize the functionality and design of countless existing products. To exemplify this, the Fraunhofer FEP together with the company EMDE development of light GmbH will be presenting hybrid flexible OLEDs integrated into textile designs within the EU-funded project PI-SCALE for the first time at LOPEC (March 19-21, 2019 in Munich, Germany) as examples of some of the many possible applications.
The Fraunhofer FEP, a provider of research and development services in the field of organic electronics, has long been involved in the development of...
For the first time, an international team of scientists based in Regensburg, Germany, has recorded the orbitals of single molecules in different charge states in a novel type of microscopy. The research findings are published under the title “Mapping orbital changes upon electron transfer with tunneling microscopy on insulators” in the prestigious journal “Nature”.
The building blocks of matter surrounding us are atoms and molecules. The properties of that matter, however, are often not set by these building blocks...
Scientists at the University of Konstanz identify fierce competition between the human immune system and bacterial pathogens
Cell biologists from the University of Konstanz shed light on a recent evolutionary process in the human immune system and publish their findings in the...
Laser physicists have taken snapshots of carbon molecules C₆₀ showing how they transform in intense infrared light
When carbon molecules C₆₀ are exposed to an intense infrared light, they change their ball-like structure to a more elongated version. This has now been...
The so-called Abelian sandpile model has been studied by scientists for more than 30 years to better understand a physical phenomenon called self-organized...
11.02.2019 | Event News
30.01.2019 | Event News
16.01.2019 | Event News
21.02.2019 | Life Sciences
21.02.2019 | Earth Sciences
21.02.2019 | Life Sciences