Results 251 to 260 of about 5,632 (290)

Brinkman-Rice transition in layered perovskites

Physical Review B, 1993
We consider a one-band model effective Hamiltonian ${\mathit{H}}_{\mathit{e}\mathit{f}\mathit{f}}$ deriv ed previously from the three-band model H for ${\mathrm{CuO}}_{2}$ planes. The parameters of ${\mathit{H}}_{\mathit{e}\mathit{f}\mathit{f}}$ are given in terms of those of H by a simple prescription.
, Simón, , Aligia
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Introduction of Graphene Nanofibers into the Perovskite Layer of Perovskite Solar Cells

ChemSusChem, 2018
AbstractAlthough the application of graphene‐derived nanomaterials in the electron transport layer (ETL), hole transport layer (HTL), or top electrode of perovskite solar cells (PSCs) has been thoroughly studied, the effects of inserting such materials into the perovskite layer of PSCs is not well understood. In this study, pristine graphene nanofibers
Yun Li, Wallace Woon‐Fong Leung
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Multifunctional layered hybrid perovskites

Journal of Materials Chemistry C, 2021
Layered hybrid perovskites incorporating organic moieties with enhanced functionalities within the perovskite scaffold enable the development of advanced multifunctional materials.
openaire   +1 more source

Topochemical Modification of Layered Perovskites

MRS Proceedings, 2008
AbstractTopochemical reaction strategies based on two-step intercalation methods are studied. Reactions involving reductive followed by oxidative intercalation are quite effective in making new compounds; the synthesis and characterization of (A2Cl)LaNb2O7 (A = Rb, Cs) are presented.
Jong-Lak Choi, Elisha Josepha, Xiao Zhang, John Wiley   +3 more
openaire   +1 more source

Layered perovskites as ‘soft-ceramics’

Journal of the European Ceramic Society, 1999
Abstract The layered perovskite KCa 2 Nb 3 O 10 is shown to possess large elastic and fracture anisotropies which are explained on the basis of its structure. Its fracture toughness was measured relative to the in-basal and basal-normal directions. Combined with previously determined elastic moduli, the fracture energy release rates and associated ...
Geoff Fair, Michael Shemkunas, William T. Petuskey, Sankar Sambasivan   +3 more
openaire   +1 more source

Synergistically modifying electron transport layers and bottom buried perovskite layers of perovskite solar cells

Journal of Materials Chemistry C, 2023
The electron transport layer (ETL) and its adjacent interface are essentially important for perovskite solar cells (PSCs).
Xiangheng Liu, Zhengyan He, Honglei Yu, Shufang Zhang, Changlin Yao, Qi Zhang, Ping Chen   +6 more
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Perovskite layers make the grade

Science, 2018
Solar Cells Inverted planar perovskite solar cells offer opportunities for a simplified device structure compared with conventional mesoporous titanium oxide interlayers. However, their lower open-circuit voltages result in lower power conversion efficiencies.
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Diffuse scattering in the layered perovskites

Zeitschrift für Kristallographie, 2005
Abstract Single-crystal X-ray and neutron diffuse scattering techniques have been used to probe a variety of short-range displacive and magnetic orderings in the layered transition-metal perovskites which arise due to the intimate coupling of their structural, electronic and magnetic degrees of freedom.
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Noncuprate Layered Perovskite Superconductor

1997
All the high-T c oxide superconductors (HTSC) known to date are copper-based oxides (cuprates) in the layered perovskite crystal structures that contain a planar network of copper and oxygen (CuO2 planes). Without doubt such a planner network provides the essential environment for the occurrence of high T c.
Y. Maeno, S. Ikeda
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Multifunctional MgO Layer in Perovskite Solar Cells

ChemPhysChem, 2015
AbstractA multifunctional magnesium oxide (MgO) layer was successfully introduced into perovskite solar cells (PSCs) to enhance their performance. MgO was coated onto the surface of mesoporous TiO2 by the decomposition of magnesium acetate and, therefore, could block contact between the perovskite and TiO2. X‐ray photoelectron spectroscopy and infrared
Xudong, Guo, Haopeng, Dong, Wenzhe, Li, Nan, Li, Liduo, Wang   +4 more
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