Design, synthesis, and characterization of a new hybrid organic–inorganic perovskite with a high-T_c dielectric transition

Abstract

Phase change materials (PCM) have drawn increasing attention for their promising applications in thermal switch, data communication and energy storage. Because of the complexity of the interactions between molecules, it...

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

“…Figure a is a solid UV diffuse reflection of compound 1 . As can be seen from Figure a, there is a clear absorption between 200 and 400 nm, which is consistent with what has been reported in the references . The bandgap is roughly calculated using the transversal method.…”

“…The symmetric elements increase from LTP (E, C 2 , i, and σ h ) to HTP (E, 2C 6 , 2C 3 , C 2 , i, 2S 3 , 2S 6 , σ h ) during the phase transition. It is clear from Figures 2b, 2d 19 Both of them form a 1D chain structure, and the bond lengths and bond angles between atoms are basically similar. 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.…”

“…As can be seen from Figure 6a, there is a clear absorption between 200 and 400 nm, which is consistent with what has been reported in the references. 19 The bandgap is roughly calculated using the transversal method. The basic principle is that the band edge wavelength of the semiconductor (also known as the absorption threshold, λ g ) is determined by the bandgap width E g .…”

“…At 102 K, the crystal structure of compound 1, as illustrated in Figure 2a and the bond angles in Pb−Br−Pb are from 79.12°to 81.51°, which are similar to the reported literature. 19,20 The other bond lengths and angles are also listed in Table S2. The packing model of crystals in the LTP are shown in Figures 2c and 2e.…”

Dielectric and optical properties of a new organic–inorganic hybrid phase transition material

“…6,29,30 There have been quite a few studies using the [N(Et) 3 CH 2 Cl] + cation. For example, [N(Et) 3 CH 2 Cl] 2 PbBr 3 , a 1D perovskite with a phase-transition temperature of 394 K, was successfully synthesized by Cai et al 31 Tan et al successfully synthesized [N(Et) 3 CH 2 Cl][ClO 4 ] and [N(Et) 3 CH 2 Cl][BF 4 ] with phase-transition temperatures at 455 K and 432 K, respectively. Both were organic ionic plastic crystals, which have two continuous reversible transitions triggered by the order and disorder of anions and ammonium ions.…”