1 research outputs found
Meltable Hybrid Antimony and Bismuth Iodide One-Dimensional Perovskites
Hybrid lead-halide perovskites have been studied extensively
for
their promising optoelectronic properties and prospective applications,
including photovoltaics, solid-state lighting, and radiation detection.
Research into these materials has also been aided by the simple and
low-temperature synthetic conditions involved in solution-state deposition/crystallization
or melt-processing techniques. However, concern over lead toxicity
has plagued the field since its infancy. One of the most promising
routes to mitigating toxicity in hybrid perovskite materials is substituting
isoelectronic Bi(III) for Pb(II). Various methods have been developed
to allow pnictide-based systems to capture properties of the Pb(II)
analogues, but the ability to melt extended hybrid pnictide-halide
materials has not been investigated. In this work, we prepare a series
of one-dimensional antimony- and bismuth-iodide hybrid materials employing
tetramethylpiperazinium (TMPZ)-related cations. We observe, for the
first time, the ability to melt extended hybrid pnictide-halide materials
for both the Sb(III) and Bi(III) systems. Additionally, we find that
Sb(III) analogues melt at lower temperatures and attribute this observation
to structural changes induced by the increased stereochemical activity
of the Sb(III) lone pair coupled with the reduction in effective dimensionality
due to steric interactions with the organic cations. Finally, we demonstrate
the ability to melt process phase pure thin films of (S-MeTMPZ)SbI5