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2017 ; 7
(ä): 45543
Nephropedia Template TP
Sci Rep
2017[Mar]; 7
(ä): 45543
PMID28358041
show ga
Organic-inorganic perovskites have already shown a tremendous potential for
low-cost light-harvesting devices. Yet, the relatively low carrier mobilities in
bulk perovskites still prevent large-area devices with performances competing
with state-of-the-art technologies. Here, we tackle this fundamental challenge by
incorporating single-wall carbon nanotubes within a perovskite matrix by means of
a simple two-step method in ambient air. Using this nano-engineered hybrid film,
we demonstrate large-area photodetectors with responsivities up-to 13.8?A.W(-1)
and a broad spectral response from 300 to 800?nm, indicating that photocurrent
generation arises from the charge transfer from the perovskite matrix to the
embedded nanotube network. As the nanotubes facilitate the carrier extraction,
these photodetectors also show a fast response time of 10?ms. This is
significantly faster than most of previous reports on perovskite-based
photodetectors, including devices with much smaller photosensitive areas. This
approach is also well-suited for large-scale production of other perovskite-based
light-harvesting devices.