Oxygen Vacancy Ordering in Aluminous Bridgmanite in the Earth's Lower Mantle

Autor: Helen Grüninger, Zhaodong Liu, Renée Siegel, Tiziana Boffa Ballaran, Tomoo Katsura, Jürgen Senker, Daniel J. Frost

Publikováno v: Geophysical Research Letters, Vol 46, Iss 15, Pp 8731-8740 (2019)

Abstract Oxygen vacancies (OVs), that charge‐balance the replacement of octahedrally coordinated Si4+ by Al3+ in the mineral bridgmanite, will influence transport properties in the lower mantle but little is known about their stability and local st

Externí odkaz: https://doaj.org/article/90659ba8242a43a5b26927a619afad58

How Methylammonium Iodide Reactant Size Affects Morphology and Defect Properties of Mechanochemically Synthesized MAPbI 3 Powder

Autor: Nico Leupold, Philipp Ramming, Irene Bauer, Christina Witt, Jennifer Jungklaus, Ralf Moos, Helen Grüninger, Fabian Panzer

Publikováno v: European Journal of Inorganic Chemistry, 26, 1-7
European Journal of Inorganic Chemistry, 26, 8, pp. 1-7

Contains fulltext : 290494.pdf (Publisher’s version ) (Closed access) 03 februari 2023

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61d29330468ba61cb288284f60161d66
https://doi.org/10.1002/ejic.202200736

Microscopic (dis)order and dynamics of cations in mixed FA/MA lead halide perovskites

Autor: Ralf Moos, Gilles A. de Wijs, Menno Bokdam, Arno P. M. Kentgens, Nico Leupold, Paul Tinnemans, Fabian Panzer, Helen Grüninger

Publikováno v: Journal of Physical Chemistry C, 125, 1742-1753
Journal of Physical Chemistry C, 125, 3, pp. 1742-1753
Journal of physical chemistry C, 125, 1742-1753. American Chemical Society
The Journal of Physical Chemistry. C, Nanomaterials and Interfaces

Recent developments in the field of high efficiency perovskite solar cells are based on stabilization of the perovskite crystal structure of FAPbI3 while preserving its excellent optoelectronic properties. Compositional engineering of, for example, M

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e562335a64cbe898029964741a0969dc
https://doi.org/10.1021/acs.jpcc.0c10042

MA dynamics in mixed halide MAPbI3-xBrx perovskites

Autor: Helen Grüninger, Kostas Fykouras, Menno Bokdam, Nico Leupold, Gilles de Wijs, Fabian Panzer, Arno P. M. Kentgens

Publikováno v: Proceedings of the Online Conference on Atomic-level Characterisation of Hybrid Perovskites.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::896b220ab541ecbe5573a077d005383e
https://doi.org/10.29363/nanoge.hpatom.2022.018

Quantitative description of 1H SQ and DQ coherences for the hydroxyl disorder within hydrous ringwoodite

Autor: Jürgen Senker, Katherine Armstrong, Daniel J. Frost, Adrian Schmutzler, Helen Grüninger, Renée Siegel

Publikováno v: Physical Chemistry Chemical Physics. 20:15098-15105

Proton-containing point defects in solid materials are important for a variety of properties ranging from ionic transport over thermal conductivity up to compressibility. Ultrafast magic-angle spinning techniques nowadays offer high-resolution solid-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d143b91fee070c048b15beb77d9ae6fe
https://doi.org/10.1039/c8cp00863a