Enhancing
Stability of Perovskite Solar Cells to Moisture by the Facile Hydrophobic
Passivation
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Abstract
In this study, a novel and facile
passivation process for a perovskite solar cell is reported. Poor
stability in ambient atmosphere, which is the most critical demerit
of a perovskite solar cell, is overcome by a simple passivation process
using a hydrophobic polymer layer. Teflon, the hydrophobic polymer,
is deposited on the top of a perovskite solar cell by a spin-coating
method. With the hydrophobic passivation, the perovskite solar cell
shows negligible degradation after a 30 day storage in ambient atmosphere.
Suppressed degradation of the perovskite film is proved in various
ways: X-ray diffraction, light absorption spectrum, and quartz crystal
microbalance. This simple but effective passivation process suggests
new kind of approach to enhance stability of perovskite solar cells
to moisture