One-Dimensional Organic–Inorganic Hybrid Perovskite Incorporating Near-Infrared-Absorbing Cyanine Cations

Hybrid perovskite
crystals with organic and inorganic structural
components are able to combine desirable properties from both classes
of materials. Electronic interactions between the anionic inorganic
framework and functional organic cations (such as chromophores or
semiconductors) can give rise to unusual photophysical properties.
Cyanine dyes are a well known class of cationic organic dyes with
high extinction coefficients and tunable absorption maxima all over
the visible and near-infrared spectrum. Here we present the synthesis
and characterization of an original 1D hybrid perovskite composed
of NIR-absorbing cyanine cations and polyanionic lead halide chains.
This first demonstration of a cyanine-perovskite hybrid material is
paving the way to a new class of compounds with great potential for
applications in photonic devices.