Dielectric Relaxation and Dielectric Switching Behaviors in (N,N‐Diisopropylethylamine) Tetrachloroantimonate(III)

Abstract

Dielectric switches have drawn renewed attention to the study of their many potential applications with the adjustable switch temperatures (Ts). Herein, a novel antimony‐based halide semiconductor, (N,N‐diisopropylethylamine) tetrachloroantimonate ((DIPEA)SbCl4, DIPEA+=N,N‐diisopropylethylamine), with dielectric relaxation behavior and dielectric switches has been successfully synthesized. This compound, consisting of coordinated anion []SbCl4∞- ${{\left[{{\rm S}{\rm b}{\rm C}{\rm l}}_{4}\right]}_{\infty }^{-}}$ chains and isolated DIPEA+ cations, undergoes an isostructural order‐disorder phase transition and shows a step‐like dielectric anomaly, which can function as a frequency‐tuned dielectric switch with highly adjustable switch temperature (Ts). Variable‐temperature single‐crystal structure analyses and first‐principles molecular dynamics simulations give information about the general mechanisms of molecular dynamics. This work enriches the dielectric switch family and proves that hybrid metal halides are promising candidates for switchable physical or chemical properties.

Temperature-tunable multiple dielectric switch in hybrid rare-earth perovskites regulated by hierarchical guest dynamics, lanthanide contraction and doping

“…[1][2][3][4][5][6][7][8][9][10] While mechanically activated dielectric switches, known as piezoelectrics, have played crucial roles in contemporary electrical and electronic devices, their temperaturedriven counterparts are less developed but have aroused a growing interest in recent years. [11][12][13][14][15][16][17][18][19][20][21][22][23][24] From the perspective of polarization mechanism, temperature-driven dielectric switching in crystalline molecule-based materials usually stems from the variation of a dipole unit from frozen to thermally activated, or an alteration of its rotational dynamics that is often accompanied by a structural phase transition. The switching temperatures (T s ) in most of these switches are restrictively fixed at the phase transition temperatures.…”

“…1–10 While mechanically activated dielectric switches, known as piezoelectrics, have played crucial roles in contemporary electrical and electronic devices, their temperature-driven counterparts are less developed but have aroused a growing interest in recent years. 11–24…”