Targeted regulation and optimization of multifunctional phase transition materials by novel void occupancy engineering

Abstract

As an innovative form of stimulus-response materials, organic-inorganic hybrid phase transition materials have become a wonderful contender in the field functional electronic equipment due to their versatile structure, intensive functions...

Structural phase transition drives outright photoluminescence quenching and dielectric duple bistable switching

“…In hybrid phase transition materials, there exists a discernible correlation between the void occupancy and the T p , which can be employed to better elucidate the relationship between the strength of intermolecular forces, spatial steric hindrance, and the phase transition temperature. 48 As depicted in Fig. 4c–e, the quantitative void occupancy values are determined to be 30.07% in (TEMA)PbBr 3 , 27.52% in (TECA)PbBr 3 , and 27.22% in (TEBA)PbBr 3 , aligning with the lower void occupancy and higher phase transition temperature.…”

Novel One-Dimensional Organic–Inorganic Hybrid Halide Perovskite Material with Coexistence of High Phase Transition Temperature and Corresponding Dielectric Response

“…21 All of these lead us to further think about the change of the void occupancy between them (void occupancy is the ratio of the void volume that can be used to contain organic cations between inorganic anions). 22 We speculate that an increase in the volume of organic cations leads to a decrease in the movement space of organic cations and an increase in the phase transition temperature. In order to verify conjecture, the void occupancy of the [Et 3 NCH 2 Cl][PbBr 3 ] and compound 1 was calculated by Multiwfn.…”

“…In such organic–inorganic hybrid systems, cations used for charge balance could influence the arrangement of chains, resulting in different distances between [PbBr 3 ] − chains . All of these lead us to further think about the change of the void occupancy between them (void occupancy is the ratio of the void volume that can be used to contain organic cations between inorganic anions) . We speculate that an increase in the volume of organic cations leads to a decrease in the movement space of organic cations and an increase in the phase transition temperature.…”

Reversible Phase Transition and Dielectric Response of Hybrid Lead-Free Antimony-Based Crystals

“…However, the phase transition temperature remained constant (Figure c,f). This result indicates that compounds CPEA-Br and FPEA-Br do not exhibit dielectric relaxation within the measured frequency range and can be applied to dielectric switching. − …”