Results 21 to 30 of about 105,088 (326)

Surface Reconstruction of Perovskites for Water Oxidation: The Role of Initial Oxides’ Bulk Chemistry

open access: yesSmall Science, 2022
Developing highly active electrocatalysts for oxygen evolution reaction (OER) is crucial for the scalable production of renewable hydrogen fuels by water electrolysis.
Haiyan Li   +6 more
doaj   +1 more source

Exciton Fine Structure in Perovskite Nanocrystals [PDF]

open access: yesNano Letters, 2019
The bright emission observed in cesium lead halide perovskite nanocrystals (NCs) has recently been explained in terms of a bright exciton ground state [ Becker et al. Nature 2018 , 553 , 189 - 193 ], a claim that would make these materials the first known examples in which the exciton ground state is not an optically forbidden dark exciton.
Peter C. Sercel   +5 more
openaire   +3 more sources

The complex oxides with octahedral structures: Existence areas and phase transitions [PDF]

open access: yesJournal of Advanced Dielectrics, 2020
The experimental and calculated data on the existence of complex oxides in solid state with the octahedral structures of four families, namely perovskites, Bi-containing layered perovskite-like ones, tetragonal tungsten bronzes and pyrochlores, and about
G. A. Geguzina
doaj   +1 more source

Structural changes and band gap tunability with incorporation of n-butylammonium iodide in perovskite thin film

open access: yesHeliyon, 2020
The current work presents structural change and band gap tunability using hybrid organic-inorganic perovskite with the incorporation of long chain ammonium halide.
Leong Wei Xian Rebecca   +3 more
doaj   +1 more source

Quasi-2D lead halide perovskite gain materials toward electrical pumping laser

open access: yesNanophotonics, 2021
Quasi two-dimensional (2D) lead halide perovskite materials have shown outstanding performance in various photoelectric devices, including perovskite light-emitting diodes (LEDs) and perovskite optical pumping lasers.
Zhao Chenyang, Qin Chuanjiang
doaj   +1 more source

Theoretical determination of the Raman spectra of MgSiO3 perovskite and post-perovskite at high pressure [PDF]

open access: yes, 2006
We use the density functional perturbation theory to determine for the first time the pressure evolution of the Raman intensities for a mineral, the two high-pressure structures of MgSiO3 perovskite and post-perovskite.
Baroni   +38 more
core   +1 more source

Fabrication and Characterization of CH3NH3PbI3−x−yBrxCly Perovskite Solar Cells

open access: yesEnergies, 2016
Fabrication and characterization of CH3NH3PbI3−x−yBrxCly perovskite solar cells using mesoporous TiO2 as electron transporting layer and 2,2′,7,7′-tetrakis-(N,N-di-4-methoxyphenylamino)-9,9′-spirobifluorene as a hole-transporting layer (HTL) were ...
Atsushi Suzuki, Hiroshi Okada, Takeo Oku
doaj   +1 more source

Synthesis and electrochemical properties of LiyM1-xCaxMnO3 (M = Pr, Eu) solid solutions

open access: yesФізика і хімія твердого тіла, 2022
New Li-containing solid solutions LiyM1-xCaxMnO3 (M = Pr and Eu) were synthesized by electrochemical lithiation of the ceramics with perovskite structure.
V. Kordan   +3 more
doaj   +1 more source

Electron diffraction of tilted perovskites [PDF]

open access: yes, 2005
Simulations of electron diffraction patterns for each of the known perovskite tilt systems have been performed. The conditions for the appearance of superlattice reflections arising from rotations of the octahedra are modified to take into account ...
Reaney, I. M., Woodward, David I.
core   +2 more sources

Optimizing Cs2TiBr6-Based PSCs with Graphene Quantum Dots

open access: yesEngineering Proceedings, 2023
The overall efficiency and optimization of perovskite solar cells are significantly influenced by the selective layers in the cells. In this study, particular emphasis is placed on a perovskite solar cell architecture in which the charge transport layer ...
Riya Sen, Menka Yadav
doaj   +1 more source

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