Perovskite and organic solar cells prove successful on a rocket flight in space

New solar cells for space

This is only possible thanks to a decisive advantage of the new solar cells: Production of silicon solar cells requires very high temperatures and elaborate processes. Perovskite cells and organic semiconductors, on the other hand, can be manufactured at room temperature from solution.

“These organic solutions are very easy to process,” explains the lead author Lennart Reb. “Thus the technologies open up new fields of application in which conventional solar cells were simply too unwieldy or too heavy – and that also applies far beyond the aerospace sector.”

Two different types of organic and perovskite solar cells were tested in space for the first time on a research flight as part of the MAPHEUS 8 program at the European Space and Sounding Rocket Range in Kiruna, Sweden. The rocket reached a height of nearly 240 kilometers.

“Our MAPHEUS program allows us rapidly to implement experiments in a zero-gravity environment, offering exciting research findings,” says Professor Andreas Meyer, co-author and Head of the DLR Institute of Materials Physics in Space. “This time it went particularly quick: it took us less than a year to progress from the initial idea to the maiden flight of the solar cells as part of the MAPHEUS 8 program.”

“Electrical measurements during the flight and the evaluation after recovery of the rocket showed that perovskite and organic solar cells can achieve their potential in terms of expected performance in orbit height,” reports Professor Müller-Buschbaum. “Our measurements are therefore of great scientific value.”

The solar cells also generated electrical energy under diffuse incidence of light. “Cells turned away from the sunlight, which received only sparse lighting exclusively from the earth during the flight, still supplied electricity,” says Reb.

Due to their much thinner thickness, the new solar cells could therefore also be used in much dimmer light, for example on missions to the outer solar system on which the sun is too weak for conventional space solar cells.

According to DLR material scientist Andreas Meyer, “it would not be the first time that innovations are first established as space technologies but go on to be used around the world in other sectors. One reason for this is probably the very strict requirements that space places on all technical components.”