Hysteretic
Behavior upon Light Soaking in Perovskite Solar Cells Prepared via
Modified Vapor-Assisted Solution Process
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Abstract
Recently, the organic–inorganic
hybrid perovskite solar cells exhibit rapidly rising efficiencies,
while anomalous hysteresis in perovskite solar cells remains unsolvable.
Herein, a high-quality perovskite thin film is prepared by a modified
vapor-assisted solution process, which is a simple but well-controllable
method proven to be capable of producing a thin film with full surface
coverage and grain size up to micrometers. The as-fabricated perovskite
solar cell has efficiency as high as 10.2%. The hysteresis effects
of both planar and mesoscopic TiO<sub>2</sub>-based perovskite solar
cells have been comprehensively studied upon illumination. The results
demonstrate that mesoporous-based perovskite cells combined with remarkable
grain size are subject to alleviating the hysteresis effects in comparison
to the planar cells. Likewise, mesoscopic TiO<sub>2</sub>-based perovskite
cells perform independently of illumination and bias conditions prior
to the measurements, whereas the planar cells display a reversible
behavior of illumination and applied bias-dependent I–V curves.
The present study would refer strip road for the stability study of
the perovskite solar cells