Rooftop panel solar cells could reach 40 percent efficiency after a new discovery by a University of Sydney researcher and his German partners.
Low-cost solar cells suitable for rooftop panels could reach a record-breaking 40 percent efficiency following a breakthrough by a University of Sydney researcher and his German partners. Professor Tim Schmidt from the University’s School of Chemistry together with the Helmholtz Centre for Materials and Energy, and with support from the Australian Solar Institute, has developed a “turbo” for solar cells, called photochemical upconversion, which allows energy normally lost in solar cells to be turned into electricity.
The finding has been published in the Energy & Environmental Science journal. Professor Tim Schmidt said using the upconversion technique, a process that harvests the part of the solar spectrum currently unused by solar cells, eliminates the need for costly redevelopment of solar cells. “We are able to boost efficiency by forcing two energy-poor red photons in the cell to join and make one energy-rich yellow photon that can capture light, which is then turned into electricity,” Professor Schmidt said. “We now have a benchmark for the performance of an upconverting solar cell. We need to improve this several times, but the pathway is now clear.”
Australian Solar Institute Executive Director Mark Twidell said this is a great example of successful collaboration between leading Australian and German solar researchers. “Together, Australia and Germany can accelerate the pace of commercialisation of solar technologies and drive down the cost of solar electricity,” Mr Twidell said. “That’s why the Australian Solar Institute is supporting collaboration between the two countries through the Australia-Germany Collaborative Solar Research and Development Program.”