A semiconducting molecular ferroelectric (2-(ammoniomethyl)pyridinium)SbI5 was designed. It shows an above-room-temperature Curie temperature (Tc=360 K), a large spontaneous polarization (Ps=4 μC cm−2) and small bandgap (2.03 eV) that are comparable to those of the well-known semiconducting ferroelectrics BiFeO3 (Eg=2.7 eV) and SbSI (Eg=2.0 eV). The implementation of ferroelectricity into hybrid semiconducting materials will move the applications of hybrid semiconducting molecular ferroelectrics in optoelectronic and photovoltaics devices forward.
- Peng-Fei Li
- Yuan-Yuan Tang
- Ren-Gen Xiong