Dielectric switching in correlation with the structural phase transitions in tetrapropylammonium perchlorate

Trzebiatowska, Monika; Kowalska, Dorota A.; Gusowski, Marek A.; Jach, Ewelina; Ciżman, A.

doi:10.1039/d2cp03665g

Cited by 3 publications

(1 citation statement)

References 33 publications

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“…During these changes ε′ values rise from 31.5 to 34.1 (III → II) and from 34.1 to 37.4 (II → I) for 1 MHz frequency. A step-like increase in the dielectric response associated with a first-order PT is a prerequisite for the functional property of dielectric switching. ,− Since we identified two such transitions with abrupt changes of ε′ in a narrow temperature range (∼20 K), this prompted us to explore the possibility of dielectric switching at three temperature points. To this end, we probed ε′ changes by cyclically adjusting the temperature from 250 to 270 K and then to 295 K at a rate of 2 K/min.…”

Section: Resultsmentioning

confidence: 99%

Three-State Dielectric Switching within a Narrow Temperature Range in Isopropylammonium Lead Iodide, a One-Dimensional Perovskite with Polar Phase

Fedoruk-Piskorska,

Zaręba,

Zelewski

et al. 2024

ACS Appl. Mater. Interfaces

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The phenomenon of dielectric switching has garnered considerable attention due to its potential applications in electronic and photonic devices. Typically, hybrid organic–inorganic perovskites, HOIPs, exhibit a binary (low–high) dielectric state transition, which, while useful, represents only the tip of the iceberg in terms of functional relevance. One way to boost the versatility of applications is the discovery of materials capable of nonbinary switching schemes, such as three-state dielectric switching. The ideal candidate for that task would exhibit a trio of attributes: two reversible, first-order phase transitions across three distinct crystal phases, minimal thermal hysteresis, and pronounced, step-like variations in dielectric permittivity, with a substantial change in its real part. Here, we demonstrate a one-dimensional lead halide perovskite with the formula (CH3)2C(H)NH3)PbI3, abbreviated as ISOPrPbI3, that fulfills these criteria and demonstrates three-state dielectric switching within a narrow temperature range of ca. 45 K. Studies on ISOPrPbI3 also revealed the polar nature of the low-temperature phase III below 266 K through pyrocurrent experiments, and the noncentrosymmetric character of the intermediate phase II and low-temperature phase III is confirmed via second harmonic generation measurements. Additionally, luminescence studies of ISOPrPbI3 have demonstrated combined broadband and narrow emission properties. The introduction of ISOPrPbI3 as a three-state dielectric switch not only addresses the limitations posed by the wide thermal gap between dielectric states in previous materials but also opens new avenues for the development of nonbinary dielectric switchable materials.

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Section: Resultsmentioning

confidence: 99%

Three-State Dielectric Switching within a Narrow Temperature Range in Isopropylammonium Lead Iodide, a One-Dimensional Perovskite with Polar Phase

Fedoruk-Piskorska,

Zaręba,

Zelewski

et al. 2024

ACS Appl. Mater. Interfaces

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Isostructural phase transition and dielectric reversibility in a cobalt thiocyanate complex incorporating an organic-inorganic hybrid compound: (C5H7N2)2[Co(NCS)]4

Abuduheni,

Yisimayili,

et al. 2024

Journal of Molecular Structure

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Synthesis, the Reversible Isostructural Phase Transition, and the Dielectric Properties of a Functional Material Based on an Aminobenzimidazole–Iron Thiocyanate Complex

Liu,

Abuduheni,

Yang

et al. 2024

IJMS

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By introducing disordered molecules into a crystal structure, the motion of the disordered molecules easily induces the formation of multidimensional frameworks in functional crystal materials, allowing for structural phase transitions and the realization of various dielectric properties within a certain temperature range. Here, we prepared a novel ionic complex [C7H8N3]3[Fe(NCS)6]·H2O (1) between 2-aminobenzimidazole and ferric isothiocyanate from ferric chloride hexahydrate, ammonium thiocyanate, and 2-aminobenzimidazole using the evaporation of the solvent method. The main components, the single-crystal structure, and the thermal and dielectric properties of the complex were characterized using infrared spectroscopy, elemental analysis, single-crystal X-ray diffraction, powder XRD, thermogravimetric analysis, differential scanning calorimetry, variable-temperature and variable-frequency dielectric constant tests, etc. The analysis results indicated that compound 1 belongs to the P21/n space group. Within the crystal structure, the [Fe(NCS)6]3− anion formed a two-dimensional hydrogen-bonded network with the organic cation through S···S interactions and hydrogen bonding. The disorder–order motion of the anions and cations within the crystal and the deformation of the crystal frameworks lead to a significant reversible isostructural phase transition and multiaxial dielectric anomalies of compound 1 at approximately 240 K.

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Dielectric switching in correlation with the structural phase transitions in tetrapropylammonium perchlorate

Abstract: The crystal of tetrapropylammonium perchlorate ([(CH3CH2CH2)4N]ClO4, TePrAClO4) compound undergoes two reversible phase transitions: at ca. T1 = 284 K and at ca. T2 = 445 K. The observed phase transition,...

Cited by 3 publications

References 33 publications

Three-State Dielectric Switching within a Narrow Temperature Range in Isopropylammonium Lead Iodide, a One-Dimensional Perovskite with Polar Phase

Three-State Dielectric Switching within a Narrow Temperature Range in Isopropylammonium Lead Iodide, a One-Dimensional Perovskite with Polar Phase

Isostructural phase transition and dielectric reversibility in a cobalt thiocyanate complex incorporating an organic-inorganic hybrid compound: (C5H7N2)2[Co(NCS)]4

Synthesis, the Reversible Isostructural Phase Transition, and the Dielectric Properties of a Functional Material Based on an Aminobenzimidazole–Iron Thiocyanate Complex

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