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
Scientists print sensors on gummi candy: creating microelectrode arrays on soft materials
21.06.2018 | Technische Universität München
Electron sandwich doubles thermoelectric performance
20.06.2018 | Hokkaido University
In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.
Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...
Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
13.06.2018 | Event News
08.06.2018 | Event News
05.06.2018 | Event News
22.06.2018 | Materials Sciences
22.06.2018 | Earth Sciences
22.06.2018 | Life Sciences