Results 21 to 30 of about 107,798 (351)

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

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

Structural Characteristics, Stability, and Electronic Properties of 001 Surface with Point Defects of Zinc Stannate: A First-Principle Study

open access: yesInorganics, 2022
This work presents first-principles calculations on the surface and defect impact upon zinc stannate (ZS) materials with perovskite bulk structures. The structure and electronic properties of both a perfect 001 surface and surfaces with a point defect of
Jun Li   +9 more
doaj   +1 more source

Processing and characterization of lead-free ceramics on the base of sodium–potassium niobate [PDF]

open access: yesJournal of Advanced Dielectrics, 2018
Lead-free sodium–potassium niobate-based piezoelectric materials are most intensively studied in order to replace the widely used Pb-based ones. In this work, the effects of modification of compositions by donor and acceptor dopants in the A- and B-sites
E. D. Politova   +8 more
doaj   +1 more source

Perovskite-polymer composite cross-linker approach for highly-stable and efficient perovskite solar cells. [PDF]

open access: yes, 2019
Manipulation of grain boundaries in polycrystalline perovskite is an essential consideration for both the optoelectronic properties and environmental stability of solar cells as the solution-processing of perovskite films inevitably introduces many ...
Bae, Sang-Hoon   +13 more
core   +2 more sources

Gradient Engineered Light Absorption Layer for Enhanced Carrier Separation Efficiency in Perovskite Solar Cells

open access: yesNanoscale Research Letters, 2020
Carrier transport behavior in the perovskite light absorption layer significantly impacts the performance of perovskite solar cells (PSCs). In this work, reduced carrier recombination losses were achieved by the design of a band structure in perovskite ...
Gaozhu Wu   +11 more
doaj   +1 more source

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

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

Mathematical modeling of the perovskite and double perovskite crystal structures

open access: yesIzvestiya Vysshikh Uchebnykh Zavedenii. Materialy Elektronnoi Tekhniki = Materials of Electronics Engineering, 2022
The paper considers the problem of modeling materials with the crystal structure of perovskite and double perovskite. Due to the high complexity of obtaining micro- and nanoscale objects, data on the structure and properties of such materials are especially important.
openaire   +1 more source

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