Results 41 to 50 of about 43,328 (293)

Materials Discovery of Stable and Nontoxic Halide Perovskite Materials for High-Efficiency Solar Cells

open access: yes, 2019
Two critical limitations of organic-inorganic lead halide perovskite materials for solar cells are their poor stability in humid environments and inclusion of toxic lead.
Jacobs, Ryan, Luo, Guangfu, Morgan, Dane
core   +2 more sources

Design of new Mott multiferroics via complete charge transfer: promising candidates for bulk photovoltaics

open access: yesScientific Reports, 2017
Optimal materials to induce bulk photovoltaic effects should lack inversion symmetry and have an optical gap matching the energies of visible radiation.
Hanghui Chen, Andrew Millis
doaj   +1 more source

Organic Molecule Assisted Growth of Perovskite Films Consisting of Square Grains by Surface-Confined Process

open access: yesNanomaterials, 2021
Organic–inorganic perovskite single crystals are promising in the field of optoelectronics due to their excellent optoelectronic properties. However, the ion transport of perovskite precursor is poor in confined spaces, which results in difficulty in the
Shao Xin Yan   +7 more
doaj   +1 more source

Phase formation, phonon behavior, and magnetic properties of novel ferromagnetic La3BAlMnO9 (B = Co or Ni) triple perovskites

open access: yes, 2010
In the quest for novel magnetoelectric materials, we have grown, stabilized and explored the properties of La3BAlMnO9 (B = Co or Mn) thin films. In this paper, we report the influence of the growth parameters that promote B/Al/Mn ordering in the pseudo ...
Goodenough J. B.   +5 more
core   +1 more source

Emergence of hidden phases of methylammonium lead-iodide (CH$_3$NH$_3$PbI$_3$) upon compression [PDF]

open access: yes, 2018
We perform a thorough structural search with the minima hopping method (MHM) to explore low-energy structures of methylammonium lead iodide. By combining the MHM with a forcefield, we efficiently screen vast portions of the configurational space with ...
Amsler, Maximilian   +5 more
core   +2 more sources

Theoretical Analysis of Power Conversion Efficiency of Lead-Free Double-Perovskite Cs2TiBr6 Solar Cells with Different Hole Transport Layers

open access: yesEng
In recent years, there has been significant investigation into the high efficiency of perovskite solar cells. These cells have the capacity to attain efficiencies above 14%.
Vivek Bhojak, Praveen Kumar Jain
doaj   +1 more source

Ab Initio Study on 3D Anisotropic Ferroelectric Switching Mechanism and Coercive Field in HfO2 and ZrO2

open access: yesAdvanced Functional Materials, EarlyView.
This study uncovers a new switching mechanism in HfO2 and ZrO2, where the absence of a non‐polar layer along the a‐direction induces interaction between polar layers. Consequently, the switching barriers for growth are lower than those for nucleation in this direction, leading to a size‐dependent coercive field that matches experimental observations ...
Kun Hee Ye   +6 more
wiley   +1 more source

Damping of antiferromagnetic spin waves by valence fluctuations in the double layer perovskite YBaFe2O5

open access: yes, 2007
Inelastic neutron scattering experiments show that spin dynamics in the charge ordered insulating ground state of the double-layer perovskite YBaFe2O5 is well described in terms of eg superexchange interactions. Above the Verwey transition at TV = 308 K,
F. R. Trouw   +5 more
core   +1 more source

Differentiating between perovskite and double perovskite nanocrystals

open access: yes, 2023
Perovskite structure takes the empirical formula ABX3, whereas Double perovskites, or elpasolites, are the crystal structures in which the B position in ABX3 is equally occupied by two different cations. The usual compositions of Double perovskite structure are (1-3) type double perovskites, which means that the two B cations have +1 and +3 oxidation ...
Mishra, Pritish   +3 more
openaire   +1 more source

Theory of half-metallic double perovskites. I. Double exchange mechanism [PDF]

open access: yesPhysical Review B, 2013
The double perovskite material \SFMO has the rare and desirable combination of a half-metallic ground state with 100% spin polarization and ferrimagnetic \Tc$\simeq 420$K, well above room temperature. In this two-part paper, we present a comprehensive theoretical study of the magnetic and electronic properties of half metallic double perovskites.
Meetei, O. Nganba   +5 more
openaire   +2 more sources

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