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In article 1600920, Aldo Di Carlo, Francesco Bonaccorso,

and co-workers propose the use of solution-processed

molybdenum disulfide (MoS2) flakes in lead-halide perovskite

solar cells. In this configuration, the MoS2 flakes enhance

the hole collection at the anode while protecting the perovskite

from degradation. This has a remarkable effect on the

lifetime stability of the cell, yielding power conversion efficiency,

after 550 hours of endurance test, which is 33% higher compared

to otherwise identical cells that do not exploit the MoS2.

An efficiency of 11.5% is also recorded in large area (>1 cm2)

cells. This design might boost the commercialization of

perovskite-based photovoltaics.

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