Discovery of amantadine formate: Toward achieving ultrahigh pyroelectric performances in organics

Zhou, Junyan; Jin, Shifeng; Chai, Congcong; Hao, Meiling; Zhong, Xin; Ying, Tianping; Guo, Jianhua; Chen, Xiaolong

doi:10.1016/j.xinn.2021.100204

Cited by 9 publications

(8 citation statements)

References 52 publications

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“…As demonstrated by the TGS-type proper ferroelectrics, dielectric constants often exhibit a sharp peak-like anomaly, and ε r values around T c are one or even two orders of magnitude higher than those far away from T c . As a result, their pyroelectric FOMs will be probably depressed or attenuated, as revealed by amantadine formate (AF) and Sr 0.5 Ba 0.5 Nb 2 O 6 (SBN); , it remains challenging to achieve high-value factors near their T c . In contrast, the unusual dielectric bistability of 1 , showing quite small variations of ε r and tanδ values, will result in the low-level thermal noise and high detecting rate as pyroelectric candidates for the special application of small-area (point) detectors and vidicons.…”

Section: Resultsmentioning

confidence: 99%

Giant Near-Room-Temperature Pyroelectric Figures-of-Merit Originating from Unusual Dielectric Bistability of Two-Dimensional Perovskite Ferroelectric Crystals

Tang

Han

et al. 2022

Chem. Mater.

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Pyroelectric materials with the capability of converting temperature changes into electrical signals have been widely used as essential elements for assembling integrated smart electronic detectors. Regarding the conversion efficiency of the voltage output, however, it is significant but quite challenging to exploit new candidates with large pyroelectricity figures-of-merit (FOMs) at room temperature. Herein, we have acquired giant near-room-temperature pyroelectric FOMs in the two-dimensional (2D) perovskite-type improper ferroelectric crystals of (BA)2(EA)2Pb3I10 (1, where BA = n-butylammonium and EA = ethylammonium), for which the room-temperature voltage FOM (F v = 1.06 × 10–2 cm2/μC) is about 10 times as large as that of the state-of-the-art inorganic oxides (often ∼0.1 × 10–2 cm2/μC), while the peak values near the T c are almost 2–3 orders of magnitude higher than those of the typical oxide counterparts. Such ultrahigh FOMs are mainly due to their large pyroelectric coefficients and unusual bistability of dielectric behavior, that is, an extremely small-amplitude dielectric variation caused by dipole reorientations during the ferroelectric-to-antiferroelectric phase transition at ∼315 K. This achievement of ultrahigh pyroelectric FOMs in improper ferroelectrics is in sharp contrast to the proper counterparts. Moreover, the low-cost and facile integration of crystal-based devices favors their great potential as smart pyroelectric detectors. As far as we know, the findings of giant pyroelectricity FOMs are unprecedented in 2D hybrid perovskites, which probably recall their broader prospects toward high-performance electronic device application.

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Section: Resultsmentioning

confidence: 99%

Giant Near-Room-Temperature Pyroelectric Figures-of-Merit Originating from Unusual Dielectric Bistability of Two-Dimensional Perovskite Ferroelectric Crystals

Tang

Han

et al. 2022

Chem. Mater.

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“…Analogously, for thermal energy harvesters, F E = p 2 /(ε 0 ε r ) represents the amount of electric power converted by the pyroelectrics with a given thermal energy. It is noted that all of the FOMs demand a high pyroelectric coefficient and a low dielectric constant simultaneously. , However, empirically, the positive correlation between the pyroelectric coefficient and the permittivity (generally, p /ε r 0.5 tends to be a constant) in the above-mentioned proper ferroelectrics imposes an insurmountable limit on the enhancement of FOMs. For example, PZT and PMN–PT have larger pyroelectric coefficients compared to that of the PVDF-based polymer, whose dielectric constant, nonetheless, is much higher as well.…”

Section: Introductionmentioning

confidence: 99%

Molecular Ferroelectric Crystals with Superior Pyroelectricity, Plasticity, and Recyclability

Fan,

Lu,

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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The pyroelectric effect is used in a wide range of applications such as infrared (IR) detection and thermal energy harvesting, which require the pyroelectric materials to simultaneously have a high pyroelectric coefficient and a low dielectric constant for high figures of merit. However, in conventional proper ferroelectrics, the positive correlation between the pyroelectric coefficient and the dielectric constant imposes an insurmountable challenge in upgrading the figures of merit. Here, we explored superior pyroelectricity in [(CH3)4N][FeCl4] (TMA-FC) and [(CH3)4N][FeCl3Br] (TMA-FCB) molecular ferroelectric plastic crystals, which could decouple this positive correlation due to the nature of improper polarization behavior. Therefore, TMA-FC and TMA-FCB derive a high pyroelectric coefficient and a low dielectric constant simultaneously, yielding record-high figures of merit around room temperature. Furthermore, the favorable plasticity enables ferroelectric crystals to attach surfaces with different shapes for device design and integration. More interestingly, the molecular ferroelectrics could be softened and reshaped at elevated temperatures without decay in pyroelectricity, making them recyclable for cost savings and e-waste reduction. Combined with the facile fabrication process, the findings of this work would open avenues for employing molecular ferroelectric plastic crystals in the manufacture of high-performance pyroelectric devices.

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“…Zhou et al. reported the first all‐organic pyroelectric material, amantadine formate, with high‐voltage detectivity F v 2 . Ma et al.…”

Section: Introductionmentioning

confidence: 99%

“…Zhou et al reported the first all-organic pyroelectric material, amantadine formate, with high-voltage detectivity F v . 2 Ma et al realized the coupling of photovoltaic and pyroelectric effects in BTO ferroelectric thin films, demonstrating their great potential for fast near-ultraviolet light sensing. 3 Ferroelectric materials have been studied and applied more widely because of their higher polarization strength and more significant pyroelectric effect.…”

Section: Introductionmentioning

confidence: 99%

Enhanced pyroelectric performance in potassium sodium niobate‐based ceramics via multisymmetries coexistence design

et al. 2022

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Achieving excellent pyroelectric performance remains a challenge for lead‐free piezoelectric ceramics. To meet the requirements of both an enhanced pyroelectric coefficient at room temperature and good thermal stability during the encapsulation of pyroelectric devices, (1–x)K0.48Na0.52NbO3–xBi0.5Ag0.5ZrO3–0.2%Fe2O3 (KNN–BAZ–Fe) lead‐free ferroelectric ceramics with high Curie temperatures were prepared to obtain improved pyroelectric performance via the coexistence of multiple symmetries. The variation of BAZ content led to the formation of rhombohedral–orthorhombic–tetragonal phase boundary and promoted grain growth, resulting in the best pyroelectric coefficient (p = 5.09 × 10−4 C m−2°C−1) and enhanced figures of merit (Fi = 0.2084 × 10−9 (m V−1), Fv = 0.0142 m2 C−1, Fd = 0.0947 × 10−4 Pa−1/2, and Fe = 17.66 J m−3 K−2) for infrared (IR) detection when x = 0.05. The room‐temperature pyroelectric coefficient obtained in this study is approximately four times that of the pure KNN ceramic and is the maximum value reported for niobate‐based piezoelectric ceramics. Moreover, compared with the poor thermal stability of barium titanate‐ and bismuth sodium titanate‐based ceramics because of their ultralow Curie temperature or thermal depolarization temperature, the ceramics investigated here exhibit much better thermal stability because of their high Curie temperature (TC > 300°C) and diffused phase‐transition behavior, making them more adaptable for practical applications. These results suggest that KNN–xBAZ–Fe ceramics are attractive candidates for applications in the field of IR sensors.

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Discovery of amantadine formate: Toward achieving ultrahigh pyroelectric performances in organics

Cited by 9 publications

References 52 publications

Giant Near-Room-Temperature Pyroelectric Figures-of-Merit Originating from Unusual Dielectric Bistability of Two-Dimensional Perovskite Ferroelectric Crystals

Giant Near-Room-Temperature Pyroelectric Figures-of-Merit Originating from Unusual Dielectric Bistability of Two-Dimensional Perovskite Ferroelectric Crystals

Molecular Ferroelectric Crystals with Superior Pyroelectricity, Plasticity, and Recyclability

Enhanced pyroelectric performance in potassium sodium niobate‐based ceramics via multisymmetries coexistence design

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