Perovskite Solar Cells: Stable under Space Conditions

摘要

Metal halide perovskite solar cells (PSCs) are of interest for high altitude andspace applications due to their lightweight and versatile form factor. However,their resilience toward the particle spectrum encountered in space is still ofconcern. For space cells, the effect of these particles is condensed into anequivalent 1 MeV electron fluence. The effect of high doses of 1 MeV e-beamradiation up to an accumulated fluence to 10~(16) e~- cm~(-2) on methylammoniumlead iodide perovskite thin films and solar cells is probed. By using substrate andencapsulation materials that are stable under the high energy e-beam radiation,its net effect on the perovskite film and solar cells can be studied. The quartzsubstrate-based PSCs are stable under the high doses of 1 MeV e-beam irradiation.Time-resolved microwave conductivity analysis on pristine and irradiatedfilms indicates that there is a small reduction in the charge carrier diffusion lengthupon irradiation. Nevertheless, this diffusion length remains larger than theperovskite film thickness used in the solar cells, even for the highest accumulatedfluence of 10~(16) e~- cm~(-2). This demonstrates that PSCs are promising candidatesfor space applications.