High-Sensitivity Organic–Inorganic Hybrid Materials with Reversible Thermochromic Property and Dielectric Switching

Abstract

Among the stimuli-responsive materials, thermochromic materials have received tremendous scientific attention. However, traditional organic or inorganic thermochromic materials need a complex preparation process and possess a single performance. Herein, we report a new 1D organic−inorganic hybrid material, lead iodide hybrid, [PbI 4 •4-MAPY] (CP-1) (4-MAPY = pyridin-4-ylmethanamine), with line-sharing PbI 6 octahedral chains and excellent reversible thermochromic properties (transition between lemon yellow and carmine red). In addition, the results of experimental and theoretical calculations illustrate that [PbI 4 •4-MAPY] is an indirect band gap semiconductor, and the band structures are contributed by inorganic chains. Overall, this work might afford a strategy for the detection of new dielectric and thermochromic switchable materials.

Reversible thermochromism to tune the bandgap of organic–inorganic hybrid materials

“…Therefore, low-dimensional hybrid metal halides provide opportunities for the rapid development of high-performance thermochromism and the in-depth study of structure-property relationships. [19][20][21] In 2022, the Fu group carried out research on a lead iodide hybrid [PbI 4 -MAPY] 22 having a reversible thermochromic transition between tartrazine and carmine red; the forbidden bandwidth of the [PbI 4 ] 2À chain is narrowed from 2.72 to 2.33 eV in response to heat. It has been reported that the thermochromic behavior of hybrid structures is usually caused by lattice distortion, lattice expansion, or ion rearrangement.…”

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

“…12,[24][25][26][27][28] As a typical representative of phase transition materials, organic-inorganic hybrid compounds can form different crystal structures with various physical properties, because of the flexibility of their structural composition. [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.…”

“…As a typical representative of phase transition materials, organic–inorganic hybrid compounds can form different crystal structures with various physical properties, because of the flexibility of their structural composition. 29–36 In particular, two-dimensional organic–inorganic hybrid perovskite materials have received much attention in recent years. 37–46…”

Two‐Step Dielectric Responsive Organic‐Inorganic Hybrid Material with Mid‐Band Light Emission

“…As one of the representatives, hybrid organic-inorganic perovskite (HOIP) [5] and derivatives (such as ABX 3 (A = monovalent organic cation (A + ), B = divalent transition metals (M 2 + ), X = halogen ion (Cl, Br, I)) exhibit good chemical structure stability and excellent properties (such as, photovoltaic/electric, [6] light detection [7] and photoluminescence (PL), [8] etc). Thus, this kind material has been widely used in photovoltaic, [9] sensors, [10] light-emitting diodes (LEDs) [11] field.…”