Download or read book Structure property Relationships in Noncentrosymmetric Layered Perovskites written by Andrew Ryan Sharits and published by . This book was released on 2016 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work focuses on understanding the structure property relationships in layered perovskites. Certain properties such as ferroelectricity and luminescence are highly dependent upon the crystal structure and can be affected by structural distortions. This makes understanding the crystal structure imperative as it can be adverse or beneficial to the physical property of interest. Perovskites and layered perovskites are prone to structural distortions. As such it is important to understand the forces that drive distortions and how to control them so advantageous properties can be achieved. Chapter 2 discusses the luminescence of Eu3+ in the family of doubly ordered double perovskites NaREMgWO6 (RE = La, Gd, Y). NaYMgWO6, a new member of the family, was found to crystallize in P21 space group and is isostructural with NaGdMgWO6. Emissions characteristic of Eu3+ ions (5D0 -> 7F4, 3, 2, 1,0) were observed, with the most intense transition being the 5D0 -> 7F2 transition near 615 nm. Substitution of Eu3+ onto a more compressed RE site results in a blue shift of the charge transfer excitation band and an increase in the intensity of 5D0 -> 7F2 transition. These hosts display comparable if not better luminescence than Y2O3:Eu3+, a commonly used commercial standard, demonstrating their promise as red phosphors. Chapter 3 and Chapter 4 focus on understanding octahedral tilting, phase transitions and ferroelectric properties in Ruddlesden Popper (RP) phases. Data mining using the ICSD was performed and showed that RP phases typically crystallize in 4 common tilt systems: I4/mmm (a0a0c0), P42/mnm (a0b-c0), Cmcm (a-a-c0) and Cmc21 (a-a-c+). A sorting chart was created using the perovskite tolerance factor and the difference in ionic radii of the A-site cations. This led to the compounds, Ln2SrSc2O7 (Ln= La, Pr, Nd, Sm, Eu, Gd) and Sr3Zr2O7, which fall on the sorting chart in a location that suggests they should be susceptible to a polar distortion. Using distortion mode Rietveld refinements to analyze x-ray and neutron diffraction data, these compounds were discovered to crystallize in the polar space group, Cmc21. Detailed analysis of the phase transitions and ferroelectric properties were explored in La2SrSc2O7 and Nd2SrSc2O7. Chapter 5 focuses on the crystal structures of the family of Dion-Jacobson (DJ) phases, ALnNb2O7 (A=Cs, Rb; Ln= La, Pr, Nd). X-ray diffraction of the structure showed subtle splitting suggesting a lower symmetry than the parent space group P4/mmm. Neutron diffraction of RbLnNb2O7 showed a doubling of the c-axis whereas in the CsLnNb2O7 this was not observed. Synchrotron diffraction showed peak splitting in ALaNb2O7 that had not been observed in the x-ray data. It was found that the RbLaNb2O7 and CsLaNb2O7 crystallized in the nonpolar Cmca and Cmmm space groups, respectively. RbLnNb2O7 (Ln = Pr, Nd) and CsPrNb2O7 were found to crystallize in the polar space groups Ima2 and Pmc21. The driving force behind the octahedral tilting will be discussed.
Download or read book Perovskites written by Richard J. D. Tilley and published by John Wiley & Sons. This book was released on 2016-03-03 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Uniquely describes both the crystallography and properties of perovskite related materials. Practical applications in solar cells, microelectronics and telecommunications Interdisciplinary topic drawing on materials science, chemistry, physics, and geology Contains problems and answers to enhance knowledge retention
Download or read book Structure Property Relationships in Non Linear Optical Crystals I written by Xin-Tao Wu and published by Springer. This book was released on 2012-05-30 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wen-Dan Cheng, Chen-Sheng Lin, Wei-Long Uhang, Hao Zhang: Structural Designs and Property Characterizations for Second-Harmonic Generation Materials.- Fang Kong, Chuan-Fu Sun, Bing-Ping Yang, Jiang-Gao Mao: Second-order Non-linear Optical Materials based on Metal Iodates, Selenites and Tellurites.- Guo-Fu Wang: Structure, growth, nonlinear optics and laser properties of RX3(BO3)4 (R=Y, Gd, La; X=Al, Sc).- Chaoyang Tu, Zhaojie Zhu, Zhenyu You, Jianfu Li, Yan Wang, Alain Brenier: The Recent Development of Borate SF-conversion Laser Crystal.- Ning Ye: Structure design and crystal growth of UV nonlinear borate materials.- Yi-Zhi Huang, Li-Ming Wu, Mao-Chun Hong: Cation Effect in Doped BBO and Halogen Anion Effect in Pb2B5O9X (X– = I–, Br–, Cl–).
Download or read book Structure property Relationships Synthesis and Characterization of Perovskite related Transition Metal Oxides written by Louis Whaley and published by . This book was released on 2007 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamental structural component of perovskite-related phases is the octahedrally coordinated transition metal ion, symbolized as BO6 . Corner-sharing networks of BO6 octahedra are present in perovskites and related Ruddlesden-Popper Phases, ABO3 and AO(ABO 3)n, respectively. Face-sharing octahedra arranged into columns are characteristic of hexagonal, perovskite-related phases, and the relationship will be described in detail in Chapter 1. Edge sharing octahedra are characteristic of Keggin- and Lindquist-type polyoxometallates, which at first glance, seem unconnected from perovskites. However, Chapter 1 will show the deep connections among all of the phases mentioned above, by starting with perovskite phases.
Download or read book Structure property Relationships in Hexagonal Perovskites for Microwave Dielectric Applications written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure property Relationships in Organic inorganic Halide Perovskite Solar Cells written by Sarthak Piyushkumar Jariwala and published by . This book was released on 2021 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure property Relationships of Some Mixed Transition Metal Perovskites written by and published by . This book was released on 2003 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of Structure property Relations in Layered Perovskites of the Aurivillius Family written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigations of Structure Property Relationships of Heterometallic Hybrids and ABO3 Perovskites written by Kathryn Lynn Wilberding and published by . This book was released on 2014 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Composition structure property Relationships in High Permittivity Oxide based Perovskites written by Ming Li and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure Property Relationships in Solid State Chemistry written by Daniel James Gallon and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Throughput Experimentation for the Study of Structure Property Relationships in Metal Halide Perovskites for Optoelectronic Applications written by Tonghui Wang and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of the Relationship Between the Structure and Properties of Some Stacked Perovskites written by Dean Samuel Keeble and published by . This book was released on 2009 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hybrid Organic Inorganic Perovskites Physical Properties And Applications In 4 Volumes written by and published by World Scientific. This book was released on 2022-01-07 with total page 867 pages. Available in PDF, EPUB and Kindle. Book excerpt: This four-volume handbook gives a state-of-the-art overview of hybrid organic inorganic perovskites, both two dimensional (2D) and three dimensional (3D), from synthesis and characterization and simulation to optoelectronic devices (such as solar cells and light emitting diodes), spintronics devices and catalysis application. The editors, coming from academia and national laboratory, are known for their didactic skills as well as their technical expertise. Coordinating the efforts of 30 expert authors in 21 chapters, they construct the story of hybrid perovskite structural and optical properties, electronic and spintronic response, laser action, and catalysis from varied viewpoints: materials science, chemical engineering, and energy engineering. The four volumes are arranged according to the focus material properties. Volume 1 is focused on the material physical properties including structure, deposition characteristic and the structure of the electronic bands and excitons of these compounds. Volume 2 covers the hybrid perovskite optical properties including the ultrafast optical response, photoluminescence and laser action. Volume 3 contains the spin response of these compounds including application such as spin valves, photogalvanic effect, and magnetic response of light emitting diodes and solar cell devices. Finally, and highly relevant to tomorrow's energy challenges, volume 4 is focused on the physics and device properties of the most relevant applications of the hybrid perovskites, namely photovoltaic solar cells. The text contains many high-quality colorful illustrations and examples, as well as thousands of up-to-date references to peer-reviewed articles, reports and websites for further reading. This comprehensive and well-written handbook is a must-have reference for universities, research groups and companies working with the hybrid organic inorganic perovskites.
Download or read book Structure property Relationships in Oxide Ion Conducting Hexagonal Perovskites written by Kirstie S. McCombie and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Composition structure property Relationship in Cs based Halide Perovskites Using Electronic Structure Calculations written by Anirban Naskar and published by . This book was released on 2019 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: The last three decades have witnessed significant progress in electronic materials due to the constant discovery of new materials for various applications. ABX3 (A = Cs; B = Ca, Sr, Ba; X =I, Br, Cl, or F) s-block halide perovskites are widely considered as a scintillator material and a replacement of lead-based solar device due to their excellent electronic properties. The performance of the device is linked to the atomic and electronic structure of the halide perovskites. Using ab-initio calculations, we studied the effect of chemical composition, atomic structure on the electronic properties (bandgap) of s-block halide perovskite for both bulk and surfaces. We found that the bulk and the surface bandgaps of the perovskites are closely related to the intrinsic properties such as atomic or ionic size, electronegativity, bond-dissociation energy of B and X. The bandgap changes on the surfaces compare to the bulk are explained in terms of the structural changes such as bond-distance and bond-angle. Defects are produced inevitably during the synthesis of these compounds and largely depends on the synthesis condition. It has been reported that the point defects such as antisite defects are detrimental to carrier transport as they create localized electronic (deep trap) defects on the band gap. Using ab-initio calculations, we also investigated the impact of antisite defect, XB on the electronic properties of ABX3 (A = Cs; B = Ca, Sr, or Ba; X =I, Br, Cl, or F) bulk perovskites. Our results reveal that the formation of defect state in the band gap due to antisite defect, XB strongly depends on the composition and the crystal structure. We observed that for a fixed composition of A and B the electronic defect forms at a higher energy level on the bandgap for bigger halogen atom compared to the halogen atom of smaller size. Further, the antisite defect creates localized states at two different locations in the band-gap for the orthorhombic structure. Whereas, for the same composition with the cubic crystal structure, the antisite defect creates a localized electronic state only at one location. Finally, we linked the location of these electronic defect states in the band gap to the intrinsic property of the constituent elements such as bond-dissociation energy and the atomic size, which can be a useful tool to understand and predict the position of localized electronic states produced by the point defects.
Download or read book Joint Polish German Crystallographic Meeting February 24 27 2020 Wroc aw Poland written by and published by Walter de Gruyter GmbH & Co KG. This book was released on 2020-02-24 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zeitschrift für Kristallographie. Supplement Volume 40 presents the complete Abstracts of all contributions to the Joint Polish-German Crystallographic Meeting in Wroclaw (Poland) 2020: - Plenary Talks - Microsymposia - Poster Session Supplement Series of Zeitschrift für Kristallographie publishes Abstracts of international conferences on the interdisciplinary field of crystallography.
