Data-driven discovery of NbOI2 as a high performance layered piezoelectric

https://phys.org/news/2022-08-data-driven-discovery-nboi2-high-layered.html

"NbOX2 has an intrinsic ferroelectric polarization as its crystal structure is not symmetrical in the x-direction). Interestingly, the piezoelectric coefficients are the largest for NbOI2, while the ferroelectric polarization is largest for NbOCl2... best piezoelectric performance among 2,940 materials... piezoelectric performance independent of thickness... thickness-independence of piezoelectricity in NbOX2 is useful for practical applications where the control of the material thickness may be particularly challenging"