Three HZB teams led by Prof. Christiane Becker, Prof. Bernd Stannowski and Prof. Steve Albrecht have jointly managed to increase the efficiency of perovskite silicon tandem solar cells fabricated .
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IMAGE: A conductive AFM tip is used to scan the sample surface of an a-Si:H/c-Si interface under ultra-high vacuum on the nm scale, revealing the transport channels of the charge carriers. view more
Credit: Martin Künsting /HZB
Silicon solar cells are now so cheap and efficient that they can generate electricity at prices of less than 2 cent/kWh. The most efficient silicon solar cells today are made with less than 10 nanometres thin selective amorphous silicon (a-Si:H) contact layers, which are responsible for separating the light-generated charges . Efficiencies of over 24% are achieved at HZB with such silicon heterojunction solar cells and are also part of a tandem solar cell that lead to a recently reported efficiency record of 29.15 % (A. Al-Ashouri, et al.
14 December 2020, 4:06 am EST By
Researchers are now close to reaching their long-term target of over 30% solar cell efficiency for the perovskite/silicon tandem solar cell category. At 29.15%, it surpassed the current solar cell efficiency world record of 28%.
According to a press statement from Helmholtz Zentrum Berlin (HZB), the HZB development team led by Bernd Stannowski and Steve Albrecht already received official certification for the recent value from the CalLab of the Fraunhofer Institute for Solar Energy Systems (ISE).
New tandem solar cell efficiency world record
Improving the solar cell efficiency of can highly increase the energy produced using the same surface area and similar amount of sunshine, which eventually led to a new world record for the perovskite/silicon tandem solar cell. This category is just one of numerous types of cell technologies currently available for converting solar energy into electricity, according to Science Alert.