The crystal structures of the series of ordered double perovskites Ba(2-x)Sr(x)YIrO6 (0 ≤ x ≤ 2) were refined using a combination of high-resolution synchrotron X-ray and high-intensity neutron diffraction data. The materials displayed a sequence of structures Fm3̅m(a(0)a(0)a(0)) (x = 0.6)--> I4/m(a(0)a(0)c(-)) (x = 1.0)--> I2/m(a(-)a(-)c(0)) (x = 1.4)--> P2(1)/n(a(-)a(-)c(+)) associated with increased tilting of the corner-sharing octahedra induced by increasing amount of the smaller Sr cation present. A similar sequence of transitions was induced by heating selected samples. Magnetic susceptibility measurements between 2 and 300 K showed no evidence for long-range magnetic ordering, an observation that was supported by neutron diffraction measurements, and rather strong spin-orbit coupling results in a Jeff = 0 ground state.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.inorgchem.5b01905 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
[This retracts the article DOI: 10.1039/D0RA03793A.].
View Article and Find Full Text PDFSynthesis, Structure, and Electrophysical and Electrochemical Properties of Novel Composite LaMnO-LaFeO.
Molecules
December 2024
Department of Chemistry, Faculty of Natural Sciences, Kazakh National Women's Teacher Training University, Gogol 114/1, Almaty 050000, Kazakhstan.
This article presents the synthesis, electrophysical, and catalytic properties of a LaMnO-LaFeO nanocomposite material. The nanocomposite was synthesized via the sol-gel (Pechini) method. X-ray diffraction (XRD) analysis revealed a polycrystalline, biphasic perovskite structure combining both hexagonal and cubic symmetry.
View Article and Find Full Text PDFA Chain Entanglement Gelled SnO₂ Electron Transport Layer for Enhanced Perovskite Solar Cell Performance and Effective Lead Capture.
Adv Mater
January 2025
School of Chemistry and Chemical Engineering, Ministry of Education Key Laboratory of Special Functional Aggregated Materials, Shandong Key Laboratory of Advanced Organosilicon Materials and Technologies, Shandong University, Jinan, 250100, China.
SnO₂ is a widely used electron transport layer (ETL) material in perovskite solar cells (PSCs), and its design and optimization are essential for achieving efficient and stable PSCs. In this study, the in situ formation of a chain entanglement gel polymer electrolyte is reported in an aqueous phase, integrated with SnO₂ as the ETL. Based on the self-polymerization of 3-[[2-(methacryloyloxy)ethyl]dimethylammonium]propane-1-sulfonic acid (DAES) in an aqueous environment, combining the catalytic effect of LiCl (as a Lewis acid) with the salting-out effect, and the introduction of polyvinylpyrrolidone (PVP) as the other polymer chain, a chain entanglement gelled SnO (G-SnO) structure is successfully constructed with a wide range of functions.
View Article and Find Full Text PDFCrystal structure of -poly[bis-(,-di-methyl-hydroxyl-ammonium) [di-μ-bromido-di-bromido-stannate(II)]].
Acta Crystallogr E Crystallogr Commun
January 2025
Department of Chemistry, Taras Shevchenko National University of Kyiv, Volodymyrska str. 64/13, 01601 Kyiv, Ukraine.
The title compound, {(CHNO)[SnBr]} , is a layered hybrid perovskite crystallizing in the monoclinic space group 2/. The asymmetric unit consists of one HC-O-NH -CH cation (MeHA), one Sn atom located on a twofold rotation axis, and two Br atoms. The Sn atom has a distorted octa-hedral coordination environment formed by the bromido ligands.
View Article and Find Full Text PDFHybrid spin coating and evaporation techniques for fabricating double-layer stacked dual-color perovskite LEDs.
Sci Rep
January 2025
Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, 10608, Taiwan.
This work reports on the preparation process of a double-layer perovskite active layer. The first active layer film, CsKPEAPbIBr, was fabricated using a spin-coating method, while the second active layer, MAPbBr, was deposited using MAPbBr single crystals as the evaporation source. Additionally, doping the PEDOT: PSS hole transport layer with ETA and EDA can enhance the uniformity of the perovskite film and reduce voids, improving charge transport efficiency.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!