Significance Halide perovskite (HaP) semiconductors are revolutionizing the field of photovoltaic (PV) solar energy conversion by showing remarkable performance of solar cells made with HaPs. “Ferroelectrics” is one frequently suggested reason because it may allow the spatial separation of the flow of electrons from where they were generated (holes). Unlike common, electrically insulating, ferroelectric materials, HaPs [especially tetragonal methylammonium lead triiodide (MAPbI 3 )] are semiconducting, and to find out whether they are ferroelectric requires an approach that is different from what is done customarily. Using such an approach, we prove that tetragonal MAPbI 3 is definitely ferroelectric. What still remains to be seen is whether this ferroelectric nature is important for how MAPbI 3 -based solar cells operate around room temperature.
No takes yet. Share an insight, caveat, or question.
Rakita et al. (2017) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: