Results 71 to 80 of about 7,426 (305)

Crystal structure of A-site deficient La0.2Sr0.2-xCaxTiO3 perovskite at ambient conditions and high temperatures : a neutron powder diffraction study

, 2015
The authors thank the Government of the United Arab Emirates for sponsoring this project, the EPSRC for Platform grant support and the Royal Society for a Wolfson Research Merit Award.The crystal structures of several solid solutions of the perovskite ...
Aljaberi, Ahmed Daghash, Irvine, John Thomas Sirr   +1 more
core   +1 more source

The influence of Pb vacancies on the properties of PZT-type ceramic transducers

Archives of Acoustics, 2000
This article is dedicated to prof. J. Ranachowski The result of investigations of the influence of lead vacancies on the crystalline structure of PZT-type ceramic piezoelectric materials is presented.
Z. SUROWIAK, L. KOZIELSKI, B. WODECKA-DUŚ, E.G. FESENKO, O.N. RAZUMOVSKAYA, L.A. REZNICHENKO, I.N. ZAKHARCHENKO   +6 more
doaj  

Magnetic properties of solid solutions between BiCrO3 and BiGaO3 with perovskite structures

Science and Technology of Advanced Materials, 2015
Magnetic properties of BiCr1−xGaxO3 perovskite-type solid solutions are reported, and a magnetic phase diagram is established. As-synthesized BiCrO3 and BiCr0.9Ga0.1O3 crystallize in a monoclinic (m) C2/c structure.
Alexei A Belik
doaj   +1 more source

Ultrasensitive Anti‐Stokes Luminescence Thermometry in Transition Metal Dichalcogenide Monolayers

Advanced Functional Materials, EarlyView.
We demonstrate a highly sensitive nanothermometer using anti‐Stokes photoluminescence, also known as photoluminescence upconversion (UPL), in monolayer tungsten disulfide. A strong resonantly enhanced UPL is observed, confirming the central role of optical phonons in the PL upconversion mechanism.
Sharada Nagarkar, Fahrettin Sarcan, Elanur Hut, Emiliano R. Martins, Stuart A. Cavill, Thomas F. Krauss, Yue Wang   +6 more
wiley   +1 more source

Crystalline structure and electrical properties of Dy_1-XCa_XMnO₃ solid solution

Boletín de la Sociedad Española de Cerámica y Vidrio, 2002
Solid solutions corresponding to the Dy1-xCaXMnO3 system, x=0.0 to 0.60 have been studied. The powders were prepared by solid state reaction of the corresponding oxides and carbonates. Sintered bodies were obtained by firing between 1250 and 1450ºC.
Durán, P., Peña, O., Gutierrez, D., Moure, C.   +3 more
doaj  

Designed Lewis Acid–Base Passivation for High Performance Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
ABSTRACT Silicon's high cost and long energy payback time remain major barriers to the global expansion of solar power. In contrast, metal–halide perovskites offer abundant, solution‐processable absorbers, and have achieved efficiencies of 25%–30%, positioning them as strong competitors to silicon.
Afna Manaf, Hiba Shahulhameed, Bhabani Sankar Swain, Shengzhong (Frank) Liu, Adel Najar   +4 more
wiley   +1 more source

Lead-Free Perovskite Semiconductors Based on Germanium–Tin Solid Solutions: Structural and Optoelectronic Properties [PDF]

, 2018
Solar cells and optoelectronics based on lead halide perovskites are generating considerable interest but face challenges with the use of toxic lead.
Robert L. Z. Hoye (1661407), Satyawan Nagane, Walker, Alison B., Ogale, Satishchandra, Alison B. Walker (2033368), Sadhanala, Aditya, Dibyajyoti Ghosh, Baodan Zhao, Baodan Zhao (1575955), Aditya Sadhanala (1329870), Zhao, Baodan, Nagane, Satyawan, Robert L. Z. Hoye, Hoye, Robert L.Z., Saiful Islam, M., Satishchandra Ogale, Dibyajyoti Ghosh (1664176), Satishchandra Ogale (1438018), Ghosh, Dibyajyoti, Shahab Ahmad (1261248), Shahab Ahmad, M. Saiful Islam, Alison B. Walker, Satyawan Nagane (1438012), Ahmad, Shahab, M. Saiful Islam (366233), Aditya Sadhanala   +26 more
core   +1 more source

Extremely Long Electron Lifetime in Spontaneously Passivated Polycrystalline Perovskite Layers via Illumination‐Assisted Trap Filling

Advanced Functional Materials, EarlyView.
ABSTRACT Perovskite solar cells (PSCs) are promising next‐generation photovoltaics. The high performance of PSCs is attributed to the long carrier lifetimes of perovskite photoabsorbers. However, the carrier lifetimes of polycrystalline perovskite layers, which serve as the photoabsorbers in practical PSCs, have remained limited to several tens of ...
Naoyuki Nishimura, Ryuzi Katoh, Takurou N. Murakami   +2 more
wiley   +1 more source

Ultrasmall High‐Entropy Materials: Nanoscale Effects, Synthesis, and Mechanistic Insights

Advanced Functional Materials, EarlyView.
This review article focuses on sub‐10 nm high‐entropy materials that combine nanoscale design with complex compositions for next‐generation applications. ABSTRACT Ultrasmall high‐entropy nanomaterials (USHENMs, <10 nm) merge multicomponent chemistry with size‐dependent effects, forming a distinct class of materials with unprecedented properties.
Yueyue He, Wenbo Wang, Simon Schweidler, Yanjiao Ma, Ben Breitung, Torsten Brezesinski   +5 more
wiley   +1 more source

Changes of the slab structure of constitution scandate SrLaScO4 at the isovalent substitution of strontium atoms

Доповiдi Нацiональної академiї наук України, 2019
The substitution conditions of scandium atoms in SrLaScO4 slab perovskite-like structure (SPS) of Sr1–xCaxLaScO4- type (0 ⩽ x ⩽ 0,3) have defined by X-ray powder diffraction methods.
Y.A.Titov, N.M. Belyavina, M.S.Slobodyanik, V.V.Chumak   +3 more
doaj   +1 more source