The construction of a two-dimensional organic–inorganic hybrid double perovskite ferroelastic with a high T_c and narrow band gap

Abstract

Two-dimensional (2D) hybrid double perovskites have attracted extensive research interest for their fascinating physical properties, such as ferroelectricity, X-ray detection, light response and so on. In addition, ferroelastic, as an...

Dehydration-activated structural phase transition in a two-dimensional hybrid double perovskite

“…28,30,31,33–36 The various possible combinations that are achievable make hetero-valent replacement schemes diverse compared to traditional single metal hybrid materials. 28,31,33,37 As ion-splitting double perovskites, two-dimensional double perovskites (A 4 B I B III X 8 ) possess multiple attractive physical properties, including X-ray detection, 38,39 ferroelectricity, 38,40 photoluminescence, 41,42 obvious light-response behavior, 30,43–45 and other characteristics, 46,47 which prompted us to explore the other physical properties of double perovskites. Among double perovskites, ones with solid-to-solid phase transition are extremely rare.…”

2D lead-free organic–inorganic hybrid exhibiting dielectric and structural phase transition at higher temperatures

“…[29][30][31][32][33][34][35][36] In particular, two-dimensional organic-inorganic hybrid perovskite materials have received much attention in recent years. [37][38][39][40][41][42][43][44][45][46] By tuning their molecular structures, [47][48][49][50][51][52][53] phase transition materials could exhibit an appropriate phase transition temperature and dielectric properties. For example, Luo et al 54 obtained (3-bromopropylaminium) 2 (formamidinium) Pb 2 Br 7 (BFPB) with a high T c value by performing a halogen substitution strategy to introduce a bromine atom on the n-propylamine cation.…”

“…29–36 In particular, two-dimensional organic–inorganic hybrid perovskite materials have received much attention in recent years. 37–46…”

Two host–guest grown ether supramolecules show switchable phase transition, dielectric and second-harmonic generation effect

“…1–15 The problems of how to rationally design molecules and then systematically construct functional materials have been overcome to a large extent in binary crystals, but there are few effective strategies for ternary crystals. 16–25 Simultaneously, the functional host–guest crown ether supramolecular phase transition materials have some achievements in experimental and practical applications, however, most reported complexes show phase transitions below room temperature, which limits their implications in modern functional materials. 1–13,26…”