  2D quantum confined hybrid materials are of great interest from a solid state
physics standpoint because of the rich multibody phenomena hosted, their
tunability and easy synthesis allowing to create material libraries. In
addition, from a technological standpoint, 2D hybrids are promising candidates
for efficient, tunable, low cost materials impacting a broad range of
optoelectronic devices. Different approaches and materials have therefore been
investigated, with the notable example of 2D metal halide hybrid perovskites.
Despite the remarkable properties of such materials, the presence of toxic
elements like lead are not desirable in applications and their ionic lattices
may represent a limiting factor for stability under operating conditions.
Alternative, non-ionic 2D materials made of non-toxic elements are therefore
desirable. In order to expand the library of possible hybrid quantum wells
materials, here we consider an alternative platform based on non-toxic,
self-assembled, metal-organic chalcogenides. While the optical properties have
been recently explored and some unique excitonic characters highlighted,
photo-generation of carriers and their transport in these lamellar
inorganic/organic nanostructures, critical optoelectronic aspects, remain
totally unexplored. We hereby report the first electrical investigation of the
air-stable [AgSePh] 2D coordination polymer in form of nanocrystal (NC) films
readily synthesized in situ and at low temperature, compatible with flexible
plastic substrates. The wavelength-dependent photo-response of the NC films
suggests possible use of this materials as near-UV photodetector. We therefore
built a lateral photo-detector, achieving a sensitivity of 0.8 A/W at 370 nm
thanks to a photoconduction mechanism, and a cutoff frequency of ~400 Hz, and
validated its reliability as air-stable UV detector on flexible substrates.
