Matter, Journal Year: 2024, Volume and Issue: 7(10), P. 3317 - 3350
Published: Oct. 1, 2024
Language: Английский
Small, Journal Year: 2024, Volume and Issue: 20(29)
Published: Feb. 11, 2024
Abstract There is a noticeable gap in the literature regarding research on halogen‐substitution‐regulated ferroelectric semiconductors featuring multiple phase transitions. Here, new category of 1D perovskite ferroelectrics (DFP) 2 SbX 5 (DFP + = 3,3‐difluoropyrrolidium, X − I , Br abbreviated as I‐1 and Br‐2 ) with twophase transitions (PTs) reported. The first low‐temperature PT mmm F mm PT, while high‐temperature counterintuitive inverse temperature symmetry‐breaking PT. By substitution iodine bromine, Curie ( T c) significantly increases from 348 K to 374 . Their ferroelectricity pyroelectricity are improved P s value 1.3 4.0 µC cm −2 p e 0.2 0.48 −1 for ), their optical bandgaps increased 2.1 2.7 eV. A critical slowing down phenomenon observed dielectric measurement exhibits ferroelastic domain. Structural computational analyses elucidate that order‐disorder movement cations distortion chain [SbX ] 2− anions skeleton lead semiconductor properties determined by anions. findings contribute development materials PTs provide potential applications optoelectronic field.
Language: Английский
Citations
6
Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(15), P. 4611 - 4618
Published: Jan. 1, 2024
The first polar 2D lead-free hybrid perovskite (4BrPEA) 3 BiI 6 was synthesized by reducing the occupancy rate of Bi 3+ ions, and self-powered polarization-sensitive photodetector achieved a large photocurrent anisotropy factor 2.16.
Language: Английский
Citations
6
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(44)
Published: June 26, 2024
Abstract Crystalline metal halide perovskites (MHPs) have ushered in remarkable advancements across diverse fields, including materials, electronics, and photonics. While the advantages of crystallinity are well‐established, ability to transition a glassy state with unique properties presents unprecedented opportunities expand structure‐property relationship broaden application scope for 2D MHPs. Up until now, exploration amorphous analogs MHPs is confined high‐pressure conditions, limiting in‐depth studies practical applications. In this context, new type synthesized by incorporating halogen substituted organic cations, resulting combination low melting temperature inhibited crystallization. This can be effectively melt‐quenched into except (DMIEA) 3 Pb 2 I 7 (DMIEA = N , ‐dimethyl iodoethylammonium) counterpart. Analysis crystallization activation energy (DMIPA) 4 10 (DMIPA iodopropylammonium) reveals 60.7 ± 4.0 kJ mol −1 which indicates fast glass‐crystal transition. The atypical MHP showcases facile reversible switching between crystalline states opens up novel possibilities applications, such as nonvolatile memory, optical communication, neuromorphic computing.
Language: Английский
Citations
6
Science Advances, Journal Year: 2024, Volume and Issue: 10(34)
Published: Aug. 21, 2024
Chiral hybrid perovskites show promise for advanced spin-resolved optoelectronics due to their excellent polarization-sensitive properties. However, chiral developed date rely solely on the interaction between organic ligand cations exhibiting point chirality and an inorganic framework, leading a poorly ordered short-range system. Here, we report powerful method overcome this limitation using dynamic long-range organization of guided by incorporation dopants, which induces strong interactions dopants cations. The additional interplay with reorganizes morphological crystallographic properties perovskites, notably enhancing asymmetric behavior 2D more than 10-fold, along highest dissymmetry factor photocurrent (
Language: Английский
Citations
6
Matter, Journal Year: 2024, Volume and Issue: 7(10), P. 3317 - 3350
Published: Oct. 1, 2024
Language: Английский
Citations
6