High‐T_c 1D Phase‐Transition Semiconductor Photoluminescent Material with Broadband Emission

Abstract

One dimensional (1D) organic‐inorganic halide hybrid perovskites have the advantages of excellent organic cation modifiability and diversity of inorganic framework structures, which cannot be ignored in the development of multi‐functional phase‐transition materials in photoelectric and photovoltaic devices. Here, we have successfully modified and synthesized an organic‐inorganic hybrid perovskite photoelectric multifunctional phase‐transition material: [C7H13ONCH2F]⋅PbBr3 (1). The synergistic effect of the order double disorder transition of organic cations and the change of the degree of distortion of the inorganic framework leads to its high temperature reversible phase‐transition point of Tc=374 K/346 K and its ultra‐low loss high‐quality dielectric switch response. Through in‐depth research and calculation, compound 1 also has excellent semiconductor characteristics with a band gap of 3.06 eV and the photoluminescence characteristics of self‐trapped exciton (STE) broadband emission. Undoubtedly, this modification strategy provides a new choice for the research field of organic‐inorganic hybrid perovskite reversible phase‐transition photoelectric multifunctional materials with rich coupling properties.

High-Temperature Phase Transition with Switchable Dielectric Behavior and Significant Photoluminescence Changes in a Zero-Dimensional Hybrid SbBr6 Perovskite

“…The weak hydrogen bonding between organic cations and inorganic anions in hybrid materials provides a large degree of freedom for the ordered−disordered movement of cations. 17 22 exhibit interesting switchable phase transition properties. Imidazole analogues have also been reported to exhibit ordered− disordered phase transitions.…”

“…The types of inorganic anions and electronegativity of organic cations play important roles in the hybrid metal halide structure. The weak hydrogen bonding between organic cations and inorganic anions in hybrid materials provides a large degree of freedom for the ordered–disordered movement of cations . So far, many organic–inorganic hybrid phase transition materials based on different types of amines have been discovered.…”

Intermolecular Forces Regulating the Phase-Transition Temperatures in Organic–Inorganic Hybrid Materials

“…However, as a temperature-controlled dielectric switching material, a high T c is extremely important for applications in demanding high-temperature environments, such as aerospace, construction, and military industries. − Effectively regulating T c has always been a challenge in this field. Insights from past studies on the control of T c in ferroelectric materials, a specific type of dielectric material, have provided some inspiration.…”

Novel High-Tc, Broadband-Emission Multifunctional Hybrid Compound: (4,4-DCA)2CdCl4 with Sb Doping Enhances Fluorescence Emission

“…Therefore, low-dimensional hybrid structures are ideal candidates for investigating the property–structure relationship . Fluorine is one of the most reactive nonmetal elements, which has a van der Waals radius similar to that of hydrogen but a higher atomic mass (∼19 times) . Gao et al.…”

“…11 Therefore, low-dimensional hybrid structures are ideal candidates for investigating the property−structure relationship. 12 Fluorine is one of the most reactive nonmetal elements, 13 which has a van der Waals radius similar to that of hydrogen but a higher atomic mass (∼19 times). 9 Gao et al compared the effects of fluorination and deuterium sub-stitution on the phase-transition temperature and found that the rotational barrier in the fluorination compound [N-FMedabco]PbI 3 was approximately 20 kJ/mol higher than that of the parent [N-Medabco]PbI 3 , resulting in a remarkable increase in the transition temperature (110 K).…”