Transparent nanolayers for more solar power

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There is no cheaper way to make electricity today than in the day. Hydroelectric power plants are currently being built in solar-powered areas that will provide less than two cents a day. Solar cells are available on the market based on crystalline silicon which makes this possible with up to 23 percent handling. They therefore occupy a global market share of between 95 percent. With high performance above twenty-five percent, prices could fall. A global work team led by photovoltaics researchers from Forschungszentrum Jülich is currently planning to achieve this goal with anostructured, clear objects in front of solar cells and a solid design. Scientists talk about their many years of research success in the scientific journal Nature Energy.

Silicon solar cells have been relatively stable over the past few decades and have even reached the highest level of development. Thus, the detrimental effect of the recurrence is still occurring after sun exposure and the photovoltaic generation of the solar carrier. In this process, the negative and positive charge carriers that have already been manufactured blends and dissipates before being used in the flow of solar panels. This effect can be attributed to the important properties of a valuable building – passivation.

“Our redesigned components really provide this excitement,” says Malte Köhler, a former PhD student and first author from the Jülich Institute for Energy and Climate Research (IEK-5), who has just graduated from doctorate. And again, these are just some of the goal setting shareware that you can use.

“There is no other way so far that combines these three elements – passivation, clarity, performance – as well as artificial intelligence,” says Dr. Kain Ding, head of the Jülich working group. The first example of the Jülich TPC solar cell found a high efficiency of 23.99 percent (+ – 0.29 percent) in the laboratory. The value was also emphasized by the independent CalTeC laboratory of the Institute for Solar Energy Research in Hamelin (ISFH). This means that the Jülich TPC solar cell still stands at the bottom of the best crystalline silicon cells made in laboratories to this day. But similar initiatives have shown that the potential of more than 25 percent is possible with TPC technology.

“On top of that, we just used techniques in design that can be integrated quickly in production sequences,” Ding emphasizes this opportunity over other search methods. With this in mind, Jülich scientists are developing a way to develop their technology from the laboratory to a large stage in the production of solar cells without much work.

Several steps were needed to release the TPC cells from the solar cell. Instead of a thin layer of silicon dioxide, the researchers set up a small oil tank – a pyramid-shaped nanocrystals of silicon carbide – used at two different temperatures. Finally, a straight indian tank oxide followed. Ding and some of his colleagues softened chemical reactions, chemical vapor deposition (CVD) and crushing systems.

To that end, Jülich researchers from IEK 5 and the Jülich Ernst Ruska Center for Electron Microscopy have collaborated with a number of organizations in the Netherlands, China, Russia, and Ecuador. The collaborators include researchers from RWTH Aachen University, the University of Duisburg-Essen, the technical universities of Delft and Eindhoven, the Universidad San Francisco de Quito, the University and Advanced Institute of Thermophysics in Novosibirsk and Sun Yat-Sen University in Guangzhou. In other steps, the Kaining Ding research team plans to increase the power output of its TPC solar cells. “We hope that solar cell manufacturers will show great interest in our technology,” Ding says.

Resources provided by Forschungszentrum Juelich. Note: The interior can be adjusted in shape and length.

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