Structural phase transition and dielectric switching in an organic-inorganic hybrid rare-earth double perovskite-type compound: (DMP)2LaRb(NO3)6 (DMP = N,N-dimethylpyrrolidinium cation)

Ma, Jia‐Jun; Xu, Qi; Ye, Le; Wang, Qinwen; Gong, Zhi‐Xin; Shi, Chao; Ye, Heng‐Yun; Zhang, Wan-Ying

doi:10.1016/j.jre.2021.05.010

Cited by 22 publications

(22 citation statements)

References 37 publications

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“…The (CH 3 ) 4 N + cations occupy the tetrahedral site in the lattice centered on Wyckoff site 8c, with the associated carbon atoms partially occupied (1/3) on the general position. Similar disorder for the organic cations contained in the lattices of hybrid perovskites has been reported, due to limited interaction with atoms defining the void which allows for nearly free rotation. − ,− Provided the occupational disorder in the tetramethylammonium cations, no attempt to model the hydrogen atom positions was made.…”

Section: Results and Discussionmentioning

confidence: 76%

Synthesis of an Isostructural Series of 12-Coordinate Lanthanide Nitrate Hybrid Double Perovskites with Cubic Symmetry

et al. 2022

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In efforts to study the periodic chemical properties of the rare earth elements and their structural chemistry, a hybrid double perovskite phase A 2 B′BX 6 with the formula ((CH 3 ) 4 N) 2 KLn(NO 3 ) 6 (Ln = La−Lu, Y ex. Pm) was synthesized that crystallizes in the cubic space group, Fm3̅ m. This series was obtained via evaporative crystallization from a mixture of Ln(NO 3 ) 3 , KNO 3 , and (CH 3 ) 4 N•NO 3 in a 1:1:2 ratio from either H 2 O or 4.0 M HNO 3 . In this double perovskite structure, the B site containing the lanthanide ion is coordinated by six bidentate nitrate ligands, with the distal N�O oxygen atoms coordinating the potassium on the B′ site in an octahedral six-coordinate environment. The two remaining chargecompensating (CH 3 ) 4 N + cations occupy the interstitial voids in the lattice on the A site. This periodic series was characterized via single-crystal X-ray diffraction, powder X-ray diffraction, IR, and Raman spectroscopy. Emission spectra of the Eu complex indicate a phase transition to trigonal symmetry upon cooling. This series is unique as it represents a rare isostructural series spanning the entirety of the rare earth elements excluding promethium with homoleptic 12-coordinate rare earth metal ions.

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Section: Results and Discussionmentioning

confidence: 76%

Synthesis of an Isostructural Series of 12-Coordinate Lanthanide Nitrate Hybrid Double Perovskites with Cubic Symmetry

et al. 2022

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“…Ferroelectric-paraelectric phase transitions are usually accompanied by large dielectric anomalies near T c . [37,47,48] The temperature-dependent real part of dielectric constant (ε′) was measured on single-crystal samples along the a, b, and c-axis in the frequency range from 1 kHz to 1 MHz, and the largest anomaly was observed in the b-axis direction (Figure 3b). Upon heating, ε b ′ shows a large jump in the vicinity of T c = 414 K (the peak temperature).…”

Section: Resultsmentioning

confidence: 99%

Discovery of a 2D Hybrid Silver/Antimony‐Based Iodide Double Perovskite Photoferroelectric with Photostrictive Effect and Efficient X‐Ray Response

Wang

et al. 2022

Adv Funct Materials

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2D hybrid halide double perovskites (HHDPs) have been demonstrated to be a promising alternative to conventional lead-based halide perovskites as a new system of photoferroelectrics, due to their unique characteristics of environmental friendliness, favorable stability, and fascinating optoelectronic properties. Herein, for the first time, a 2D iodide double perovskite photoferroelectric is reported based on Ag/Sb ions, (4,4-DFPD) 4 AgSbI 8 (4,4-DFPD = 4,4-difluoropiperidinium), which possesses a high Curie temperature of 414 K (above BaTiO 3 ), a large spontaneous polarization of 9.6 µC cm −2 , ferroelectric photovoltaic effect, and photostrictive effect. Notably, to the best of the authors' knowledge, the discovery of photostriction in HHDP photoferroelectrics is unprecedented. Moreover, (4,4-DFPD) 4 AgSbI 8 exhibits an impressive X-ray responsivity, with a sensitivity as high as 704.8 µC Gy air −1 cm −2 at 100 V bias and a detection limit as low as 0.36 µGy air s −1 at 10 V bias, both of which outperform the current all HHDP photoferroelectrics. This work enriches the photoferroelectric family, and proves that Ag/Sb-based HHDP photoferroelectrics are a promising candidate for the next-generation optoelectronic devices.

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“…14 Rare-earth ions feature various coordination modes conducing to the construction of double perovskites and outstanding photoluminescent properties, such as narrow emission bands, high photoluminescence quantum yields and long luminescence lifetime. 15,16 Thus, hybrid rare-earth pseudohalide double perovskites are very suitable for the exploitation of 3D perovskite materials equipped with CPL. On the other hand, chiral materials generally possess piezoelectricity naturally (except point group 432) due to the chiral structure being noncentrosymmetric, as exemplified by the first piezoelectric material, a-quartz adopting chiral point group 32.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Achieving circularly polarized luminescence and large piezoelectric response in hybrid rare-earth double perovskite by a chirality induction strategy

et al. 2022

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Structural phase transition and dielectric switching in an organic-inorganic hybrid rare-earth double perovskite-type compound: (DMP)2LaRb(NO3)6 (DMP = N,N-dimethylpyrrolidinium cation)

Cited by 22 publications

References 37 publications

Synthesis of an Isostructural Series of 12-Coordinate Lanthanide Nitrate Hybrid Double Perovskites with Cubic Symmetry

Synthesis of an Isostructural Series of 12-Coordinate Lanthanide Nitrate Hybrid Double Perovskites with Cubic Symmetry

Discovery of a 2D Hybrid Silver/Antimony‐Based Iodide Double Perovskite Photoferroelectric with Photostrictive Effect and Efficient X‐Ray Response

Achieving circularly polarized luminescence and large piezoelectric response in hybrid rare-earth double perovskite by a chirality induction strategy

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